Issues

Journal & Issues

Volume 52 (2022): Issue 4 (December 2022)

Volume 52 (2022): Issue 3 (September 2022)

Volume 52 (2022): Issue 2 (June 2022)

Volume 52 (2022): Issue 1 (March 2022)

Volume 51 (2021): Issue 4 (December 2021)

Volume 51 (2021): Issue 3 (October 2021)

Volume 51 (2021): Issue 2 (June 2021)

Volume 51 (2021): Issue 1 (March 2021)

Volume 50 (2020): Issue 4 (December 2020)

Volume 50 (2020): Issue 3 (October 2020)

Volume 50 (2020): Issue 2 (June 2020)

Volume 50 (2020): Issue 1 (March 2020)

Volume 49 (2019): Issue 4 (December 2019)

Volume 49 (2019): Issue 3 (October 2019)

Volume 49 (2019): Issue 2 (June 2019)

Volume 49 (2019): Issue 1 (March 2019)

Volume 48 (2018): Issue 1 (December 2018)

Volume 47 (2018): Issue 1 (December 2018)

Volume 46 (2018): Issue 1 (June 2018)

Volume 45 (2018): Issue 1 (March 2018)

Volume 44 (2017): Issue 1 (December 2017)

Volume 43 (2017): Issue 1 (October 2017)

Volume 42 (2017): Issue 1 (June 2017)

Volume 41 (2017): Issue 1 (March 2017)

Volume 40 (2016): Issue 1 (December 2016)

Volume 39 (2016): Issue 1 (October 2016)

Volume 38 (2016): Issue 1 (October 2016)

Volume 37 (2016): Issue 1 (July 2016)

Volume 36 (2015): Issue 1 (December 2015)

Volume 35 (2015): Issue 1 (November 2015)

Volume 34 (2015): Issue 1 (September 2015)

Volume 33 (2015): Issue 1 (September 2015)

Volume 32 (2014): Issue 1 (December 2014)

Volume 31 (2014): Issue 1 (September 2014)

Volume 30 (2014): Issue 1 (June 2014)

Volume 29 (2014): Issue 1 (March 2014)

Volume 27 (2014): Issue 1 (February 2014)

Volume 26 (2013): Issue 1 (June 2013)

Volume 25 (2013): Issue 1 (March 2013)

Volume 24 (2012): Issue 1 (December 2012)

Volume 23 (2012): Issue 1 (September 2012)

Volume 22 (2012): Issue 1 (June 2012)

Volume 21 (2012): Issue 1 (March 2012)

Volume 20 (2012): Issue 1 (January 2012)

Volume 14-15 (2010): Issue 2010 (December 2010)

Volume 13 (2010): Issue 1 (January 2010)

Volume 11-12 (2009): Issue 1 (December 2009)

Volume 9-10 (2009): Issue 1 (January 2009)

Volume 8 (2008): Issue 1 (December 2008)

Volume 7 (2008): Issue 4 (December 2008)

Volume 6 (2008): Issue 3 (September 2008)

Volume 5 (2008): Issue 2 (June 2008)

Volume 4 (2008): Issue 1 (March 2008)

Volume 3 (2007): Issue 2007 (January 2007)

Journal Details
Format
Journal
eISSN
2083-4608
First Published
26 Feb 2008
Publication timeframe
4 times per year
Languages
English

Search

Volume 37 (2016): Issue 1 (July 2016)

Journal Details
Format
Journal
eISSN
2083-4608
First Published
26 Feb 2008
Publication timeframe
4 times per year
Languages
English

Search

15 Articles
Open Access

The Concept of Method for Determining the Minimum Level of Airport Business Continuity

Published Online: 27 Jul 2016
Page range: 5 - 22

Abstract

Abstract

The paper presents the problem of determining the minimum acceptable level of products and services of airport business continuity. Conducted a study of legal requirements and operational needs. Characterized components of BCMS (ISO 22301). Determined the relationship between measures of the reliability and capacity in the airport BCMS. On this basis, presented a concept of use the reliability gamma-percent resource measure and RCM methods in the airport BCMS.

Keywords

  • airport
  • minimum acceptable level of products and services of airport business continuity
  • reliability gamma-percent resource measure
  • crisis management
Open Access

Impact of Procedures and Technical Objects on Operation of Security Control at the Airport

Published Online: 27 Jul 2016
Page range: 23 - 50

Abstract

Abstract

The article presents an analysis of the functioning of the system of security control at the airport. Analysis was made to examine the possibility of disruption occurring in the system after the introduction of controls using additional devices to detect trace amounts of explosives ETD. The analysis has been subjected to the possibility of using different configuration of the technical system to perform ETD control. The analysis allows the assessment of the proposed system configuration based on functional availability indicator.

Keywords

  • security control
  • ETD
  • system approach
Open Access

Safety Problems of Small Water Supply Systems

Published Online: 27 Jul 2016
Page range: 51 - 72

Abstract

Abstract

The paper presents issues related to risks associated with the operation of small water supply systems on the background of water consumer safety assessment made on the basis of risk analysis. Definition of water consumer safety loss as a risk associated with the water consumption of poor quality or water lack was proposed. For this purpose, a three-parameter matrix is implemented with the parameters of the probability of a representative accident scenario, the losses of the water consumers and their protection. Risk management, together with the implementation of protective barriers of small water supply system against threats is a fundamental condition for the continued operation of the system.

Keywords

  • water supply infrastructure
  • consumers safety
  • risk analysis
Open Access

The Method of Identification the Failure Risk on Water Supply Networks

Published Online: 27 Jul 2016
Page range: 73 - 94

Abstract

Abstract

Daily exploitation of the water network, collecting of data concerning the failure of water pipes and knowledge of the repair team are the basis of the data used in the process of effectively removing and identifying failures. The paper proposes a methodology to identify the risk of failure of the water supply system that uses risk indexes according to the proposed three-stage scale of risk levels. An example of application methods for the actual operational data broken down by analysis and risk assessment for bus cables and a separate analysis for the distribution network.

Keywords

  • water supply network
  • failure
  • risk
Open Access

Data Management Techniques for Blade Vibration Analysis

Published Online: 27 Jul 2016
Page range: 95 - 132

Abstract

Abstract

Well-designed procedures are required to handle large amounts of data, generated by complex measurement systems used in engine tests. The paper presents selected methodologies and software tools for characterisation and monitoring of blade vibration. Common file formats and data structures as well as methods to process and visualise tip-timing data are discussed. Report Generation Framework (RGF) developed in Python is demonstrated as a flexible tool for processing and publishing blade vibration results.

Keywords

  • blade vibration
  • tip-timing
  • report generation
  • Python
  • Matlab
Open Access

Reinforcing Wooden Composite with Glass Fiber Fabric - Manufacturing Technology as a Factor Limiting Mechanical Properties and Reliability

Published Online: 27 Jul 2016
Page range: 133 - 152

Abstract

Abstract

This paper investigates the strength and reliability of the wooden composites reinforced with glass fiber for the skateboard application. Three different methods of glass-fiber reinforcement have been used to prepare totally 94 samples, including control trial. Two lamination methods have been utilized: vacuum and HPL (High Pressure Lamination). Conducted analysis allowed to determine preferred production technique.

Keywords

  • wood
  • composites
  • glass-fiber
  • reliability
Open Access

Reliability Electrical Power System of Hospital as Cold Standby System

Published Online: 27 Jul 2016
Page range: 153 - 168

Abstract

Abstract

The probabilistic model of a hospital electrical power system consisting of mains, an emergency power system and the automatic transfer switch with the generator starter are discussed in this paper. The reliability model is semi-Markov process describing two different units renewable cold standby system and switch. The embedded Semi-Markov processes concept is applied for description of the system evolution. Time to failure of the system is represented by a random variable denoting the first passage time of the process from the given state to the subset of states. The appropriate theorems of the Semi-Markov processes theory allow us to evaluate the reliability function and some reliability characteristics.

Keywords

  • semi-Markov model
  • renewable cold standby system
  • electrical power system
Open Access

Investigation of Lubrication Properties of Petroleum Fuel and Biohydrocarbon Blends

Published Online: 27 Jul 2016
Page range: 167 - 182

Abstract

Abstract

The paper covers issues regarding lubricity of petroleum fuels used in piston and turbine engines, containing hydrocarbon biocomponents. Basing on available literature it can be said that the most prospective fuel components are biohydrocarbons. The paper describes effect of biohydrocarbons included in aviation fuel and diesel fuel on lubricity of such blends. The analysis covers two processes for obtaining biohydrocarbons, the HVO and the Fischer-Tropsch process. Due to problems with actual products acquiring, biohydrocarbons models representing chemically the actual ones from specific process. Lubricity testing was carried out according to standard test methods.

Keywords

  • lubricity
  • petroleum fuels
  • biohydrocarbons
Open Access

Issues on Vulnerability of Passenger Transportation System

Published Online: 27 Jul 2016
Page range: 183 - 202

Abstract

Abstract

In the presented paper, authors focus on the issues connected with passenger transportation system vulnerability assessment. Following this, in the article the main transportation system vulnerability definitions are discussed. Later, there is presented the comprehensive literature review connected with assessment methods used in the analysed research area. This gives the possibility to define the public transportation system’s vulnerability assessment as an element of process controlling performed by a carrier. Article ends with some conclusions and directions for future research.

Keywords

  • transportation system
  • vulnerability
  • process
Open Access

Simulation Models in Testing Reliability of Transport Process

Published Online: 27 Jul 2016
Page range: 203 - 230

Abstract

Abstract

The paper touches the problem of applying simulation models to assess the reliability of services in transport networks. Investigation of the transport processes in terms of their reliability is a complex decision-making task. The paper describes a method for assessing the reliability of transport process on the base of the criterion of minimizing the normalized lost time of vehicles. The time is wasted in a result of conflict situations occurring in the transport network during the transport process. The study includes stochastic distributions of system input. It enables studying the quality parameters of the transport network equipment, including service providers working under different workload and all kinds of disturbances. The method uses simulation models. Simulation studies were performed with Java Modelling Tools.

Keywords

  • reliability of transport processes
  • simulation models
  • transport processes
Open Access

Selected Aspects of the Security of the Process Data Transmission in the Distributed Control System

Published Online: 27 Jul 2016
Page range: 231 - 252

Abstract

Abstract

Communication between the process stations of the distributed control system is carried out. By the supervision and therapeutic systems of the stations communication process diagnosis is performed. Supervision and therapeutic systems are responsible for the security of transmitted data. The security is considered in this article mainly in the aspect of resistance to external destructive factors on the data transmission process. It is assumed that the transmission security can be provided by mechanisms protecting the integrity of the transmitted data. Correctness of the data is controlled by using one-way hash function calculated on the basis of the transmitted value variable and also is attached to the transmitted data. This allows to maintain the integrity of the transmitted process data. A solutions using one-way hash function to protection of the transmission before changing message contents (caused by eg. intruder interference) are proposed in the article.

Keywords

  • transmission security
  • integrity
  • distributed control system
Open Access

Reliability Analysis of Radioamateur Communication

Published Online: 27 Jul 2016
Page range: 253 - 276

Abstract

Abstract

The following article describes diagnostic and reliability aspects of amateur radio communications. The intention of precise measuring of quality and accuracy of every contact was present in ham radio from very beginning. The reports were sent and they are still used today, in many variants. In time, the tools to measure ionosphere state and propagation conditions emerged. They are fundamental for communication, especially long distance ones. The article concentrates on description of digital amateur mode, JT9. This mode is very effective, enables worldwide reach and requires simple tools.

Keywords

  • radio amateur
  • communication reliability
  • mode JT9
Open Access

Modelling and Simulation Characteristics of Starting System

Published Online: 27 Jul 2016
Page range: 277 - 296

Abstract

Abstract

The main purpose of the work was to develop the analytical simulation model for the starting system and to verify it on the real object. The reliability analysis of the starting system connected with operating use of mechanical and electric elements has been carried out in the developed model. It was a novelty in the conducted examination to use the LabView software for the registration of electric signals (current and voltage) and mechanical ones (rotational speed and torque).

Keywords

  • starting system
  • modelling
  • reliability
Open Access

Influence of Changes in Electrical and Electronic Equipment on the Increase of Reliability in Vehicles

Published Online: 27 Jul 2016
Page range: 297 - 318

Abstract

Abstract

The article presents considerations for improving the reliability of means of transport after introducing significant structural changes in the installation of vehicles and functioning of the embedded electrical equipment. The consequence of introducing electrical and electronic equipment to vehicles is an increased demand for energy. Uncontrolled consumption of electricity can lead to significant decline in availability. Therefore, the necessity arises of energy management through an additional function of some electrical equipment and implementation of modern design and technology according to the requirements of safety and environmental protection.

Keywords

  • electrical and electronic equipment of vehicles
  • reliability
  • environmental protection
Open Access

The Concept of a Method Ensuring Aeronautical Data Quality

Published Online: 27 Jul 2016
Page range: 319 - 340

Abstract

Abstract

The paper presents the concept of a method ensuring quality of aeronautical data. European Union (among others UE 73/2010) as well as international (among others ICAO Annex 15) regulations introduce a number of requirements regarding the quality and safety of aeronautical data. Those directives set up a complementary regulations system. However with their objective and scope they determine mainly the specifications and requirements that are to be implemented and compatible. Mentioned regulations also refer to selected international standards (e.g. ISO 19157), focused on quality and safety of geographic data and information. Nevertheless within the scope of considered regulations and norms no algorithms and methods of ensuring required quality in the process of aeronautical data collection and processing were determined. Taking into account the identified needs, authors proposed the application of statistical method for process quality management – six-sigma.

Keywords

  • aeronautical data
  • quality
  • safety
  • six-sigma
15 Articles
Open Access

The Concept of Method for Determining the Minimum Level of Airport Business Continuity

Published Online: 27 Jul 2016
Page range: 5 - 22

Abstract

Abstract

The paper presents the problem of determining the minimum acceptable level of products and services of airport business continuity. Conducted a study of legal requirements and operational needs. Characterized components of BCMS (ISO 22301). Determined the relationship between measures of the reliability and capacity in the airport BCMS. On this basis, presented a concept of use the reliability gamma-percent resource measure and RCM methods in the airport BCMS.

Keywords

  • airport
  • minimum acceptable level of products and services of airport business continuity
  • reliability gamma-percent resource measure
  • crisis management
Open Access

Impact of Procedures and Technical Objects on Operation of Security Control at the Airport

Published Online: 27 Jul 2016
Page range: 23 - 50

Abstract

Abstract

The article presents an analysis of the functioning of the system of security control at the airport. Analysis was made to examine the possibility of disruption occurring in the system after the introduction of controls using additional devices to detect trace amounts of explosives ETD. The analysis has been subjected to the possibility of using different configuration of the technical system to perform ETD control. The analysis allows the assessment of the proposed system configuration based on functional availability indicator.

Keywords

  • security control
  • ETD
  • system approach
Open Access

Safety Problems of Small Water Supply Systems

Published Online: 27 Jul 2016
Page range: 51 - 72

Abstract

Abstract

The paper presents issues related to risks associated with the operation of small water supply systems on the background of water consumer safety assessment made on the basis of risk analysis. Definition of water consumer safety loss as a risk associated with the water consumption of poor quality or water lack was proposed. For this purpose, a three-parameter matrix is implemented with the parameters of the probability of a representative accident scenario, the losses of the water consumers and their protection. Risk management, together with the implementation of protective barriers of small water supply system against threats is a fundamental condition for the continued operation of the system.

Keywords

  • water supply infrastructure
  • consumers safety
  • risk analysis
Open Access

The Method of Identification the Failure Risk on Water Supply Networks

Published Online: 27 Jul 2016
Page range: 73 - 94

Abstract

Abstract

Daily exploitation of the water network, collecting of data concerning the failure of water pipes and knowledge of the repair team are the basis of the data used in the process of effectively removing and identifying failures. The paper proposes a methodology to identify the risk of failure of the water supply system that uses risk indexes according to the proposed three-stage scale of risk levels. An example of application methods for the actual operational data broken down by analysis and risk assessment for bus cables and a separate analysis for the distribution network.

Keywords

  • water supply network
  • failure
  • risk
Open Access

Data Management Techniques for Blade Vibration Analysis

Published Online: 27 Jul 2016
Page range: 95 - 132

Abstract

Abstract

Well-designed procedures are required to handle large amounts of data, generated by complex measurement systems used in engine tests. The paper presents selected methodologies and software tools for characterisation and monitoring of blade vibration. Common file formats and data structures as well as methods to process and visualise tip-timing data are discussed. Report Generation Framework (RGF) developed in Python is demonstrated as a flexible tool for processing and publishing blade vibration results.

Keywords

  • blade vibration
  • tip-timing
  • report generation
  • Python
  • Matlab
Open Access

Reinforcing Wooden Composite with Glass Fiber Fabric - Manufacturing Technology as a Factor Limiting Mechanical Properties and Reliability

Published Online: 27 Jul 2016
Page range: 133 - 152

Abstract

Abstract

This paper investigates the strength and reliability of the wooden composites reinforced with glass fiber for the skateboard application. Three different methods of glass-fiber reinforcement have been used to prepare totally 94 samples, including control trial. Two lamination methods have been utilized: vacuum and HPL (High Pressure Lamination). Conducted analysis allowed to determine preferred production technique.

Keywords

  • wood
  • composites
  • glass-fiber
  • reliability
Open Access

Reliability Electrical Power System of Hospital as Cold Standby System

Published Online: 27 Jul 2016
Page range: 153 - 168

Abstract

Abstract

The probabilistic model of a hospital electrical power system consisting of mains, an emergency power system and the automatic transfer switch with the generator starter are discussed in this paper. The reliability model is semi-Markov process describing two different units renewable cold standby system and switch. The embedded Semi-Markov processes concept is applied for description of the system evolution. Time to failure of the system is represented by a random variable denoting the first passage time of the process from the given state to the subset of states. The appropriate theorems of the Semi-Markov processes theory allow us to evaluate the reliability function and some reliability characteristics.

Keywords

  • semi-Markov model
  • renewable cold standby system
  • electrical power system
Open Access

Investigation of Lubrication Properties of Petroleum Fuel and Biohydrocarbon Blends

Published Online: 27 Jul 2016
Page range: 167 - 182

Abstract

Abstract

The paper covers issues regarding lubricity of petroleum fuels used in piston and turbine engines, containing hydrocarbon biocomponents. Basing on available literature it can be said that the most prospective fuel components are biohydrocarbons. The paper describes effect of biohydrocarbons included in aviation fuel and diesel fuel on lubricity of such blends. The analysis covers two processes for obtaining biohydrocarbons, the HVO and the Fischer-Tropsch process. Due to problems with actual products acquiring, biohydrocarbons models representing chemically the actual ones from specific process. Lubricity testing was carried out according to standard test methods.

Keywords

  • lubricity
  • petroleum fuels
  • biohydrocarbons
Open Access

Issues on Vulnerability of Passenger Transportation System

Published Online: 27 Jul 2016
Page range: 183 - 202

Abstract

Abstract

In the presented paper, authors focus on the issues connected with passenger transportation system vulnerability assessment. Following this, in the article the main transportation system vulnerability definitions are discussed. Later, there is presented the comprehensive literature review connected with assessment methods used in the analysed research area. This gives the possibility to define the public transportation system’s vulnerability assessment as an element of process controlling performed by a carrier. Article ends with some conclusions and directions for future research.

Keywords

  • transportation system
  • vulnerability
  • process
Open Access

Simulation Models in Testing Reliability of Transport Process

Published Online: 27 Jul 2016
Page range: 203 - 230

Abstract

Abstract

The paper touches the problem of applying simulation models to assess the reliability of services in transport networks. Investigation of the transport processes in terms of their reliability is a complex decision-making task. The paper describes a method for assessing the reliability of transport process on the base of the criterion of minimizing the normalized lost time of vehicles. The time is wasted in a result of conflict situations occurring in the transport network during the transport process. The study includes stochastic distributions of system input. It enables studying the quality parameters of the transport network equipment, including service providers working under different workload and all kinds of disturbances. The method uses simulation models. Simulation studies were performed with Java Modelling Tools.

Keywords

  • reliability of transport processes
  • simulation models
  • transport processes
Open Access

Selected Aspects of the Security of the Process Data Transmission in the Distributed Control System

Published Online: 27 Jul 2016
Page range: 231 - 252

Abstract

Abstract

Communication between the process stations of the distributed control system is carried out. By the supervision and therapeutic systems of the stations communication process diagnosis is performed. Supervision and therapeutic systems are responsible for the security of transmitted data. The security is considered in this article mainly in the aspect of resistance to external destructive factors on the data transmission process. It is assumed that the transmission security can be provided by mechanisms protecting the integrity of the transmitted data. Correctness of the data is controlled by using one-way hash function calculated on the basis of the transmitted value variable and also is attached to the transmitted data. This allows to maintain the integrity of the transmitted process data. A solutions using one-way hash function to protection of the transmission before changing message contents (caused by eg. intruder interference) are proposed in the article.

Keywords

  • transmission security
  • integrity
  • distributed control system
Open Access

Reliability Analysis of Radioamateur Communication

Published Online: 27 Jul 2016
Page range: 253 - 276

Abstract

Abstract

The following article describes diagnostic and reliability aspects of amateur radio communications. The intention of precise measuring of quality and accuracy of every contact was present in ham radio from very beginning. The reports were sent and they are still used today, in many variants. In time, the tools to measure ionosphere state and propagation conditions emerged. They are fundamental for communication, especially long distance ones. The article concentrates on description of digital amateur mode, JT9. This mode is very effective, enables worldwide reach and requires simple tools.

Keywords

  • radio amateur
  • communication reliability
  • mode JT9
Open Access

Modelling and Simulation Characteristics of Starting System

Published Online: 27 Jul 2016
Page range: 277 - 296

Abstract

Abstract

The main purpose of the work was to develop the analytical simulation model for the starting system and to verify it on the real object. The reliability analysis of the starting system connected with operating use of mechanical and electric elements has been carried out in the developed model. It was a novelty in the conducted examination to use the LabView software for the registration of electric signals (current and voltage) and mechanical ones (rotational speed and torque).

Keywords

  • starting system
  • modelling
  • reliability
Open Access

Influence of Changes in Electrical and Electronic Equipment on the Increase of Reliability in Vehicles

Published Online: 27 Jul 2016
Page range: 297 - 318

Abstract

Abstract

The article presents considerations for improving the reliability of means of transport after introducing significant structural changes in the installation of vehicles and functioning of the embedded electrical equipment. The consequence of introducing electrical and electronic equipment to vehicles is an increased demand for energy. Uncontrolled consumption of electricity can lead to significant decline in availability. Therefore, the necessity arises of energy management through an additional function of some electrical equipment and implementation of modern design and technology according to the requirements of safety and environmental protection.

Keywords

  • electrical and electronic equipment of vehicles
  • reliability
  • environmental protection
Open Access

The Concept of a Method Ensuring Aeronautical Data Quality

Published Online: 27 Jul 2016
Page range: 319 - 340

Abstract

Abstract

The paper presents the concept of a method ensuring quality of aeronautical data. European Union (among others UE 73/2010) as well as international (among others ICAO Annex 15) regulations introduce a number of requirements regarding the quality and safety of aeronautical data. Those directives set up a complementary regulations system. However with their objective and scope they determine mainly the specifications and requirements that are to be implemented and compatible. Mentioned regulations also refer to selected international standards (e.g. ISO 19157), focused on quality and safety of geographic data and information. Nevertheless within the scope of considered regulations and norms no algorithms and methods of ensuring required quality in the process of aeronautical data collection and processing were determined. Taking into account the identified needs, authors proposed the application of statistical method for process quality management – six-sigma.

Keywords

  • aeronautical data
  • quality
  • safety
  • six-sigma

Plan your remote conference with Sciendo