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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 51 (2021): Issue 2 (June 2021)

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

Search

12 Articles
Open Access

Federated Learning for Spanish Ports as an Aid to Digitization

Published Online: 17 Jul 2021
Page range: 1 - 17

Abstract

Abstract

The Spanish Port System is immersed in the process of digital transformation towards the concept of Ports 4.0. This entails new regulatory and connectivity requirements, making it necessary to implement the new technologies offered by the market towards digitalization. The digitalization of the individual processes in a first step helps the exchange of digital information between the members of the port community. The next step will mean that the information flow between the participants of a port community is done in a reliable, efficient, paperless way, and thanks to technologies. However, for the Spanish port sector, data exchange has a competitive disadvantage. That is why Federated Learning is proposed. This approach allows several organizations in the port sector to collaborate in the development of models, but without the need to directly share sensitive port data among themselves. Instead of gathering data on a single server, the data remains locked on your server, and the algorithms and predictive models travel between them. The goal of this approach is to benefit from a large set of data, which contributes to increased Machine Learning performance while respecting data ownership and privacy. Through an Inter-institution or “Cross-silo FL” model, different institutions contribute to the training with their local datasets in which different companies collaborate in training a learning machine for the discovery of patterns in private datasets of high sensitivity and high content. This environment is characterized by a smaller number of participants than the mobile case, with typically better bandwidth and less intermittency.

Keywords

  • machine learning
  • federated learning
  • data digitalization
Open Access

Preliminary System Safety Hazard Analysis of a Transport Helicopter SHM System

Published Online: 17 Jul 2021
Page range: 19 - 31

Abstract

Abstract

The purpose of this paper is to provide the Mi-8/17 helicopter Structural Health Monitoring (SHM) System Preliminary System Safety Hazard Analysis (PSSHA). The PSSHA identifies and classifies potential hazards, and the actions necessary to reduce or eliminate the risks resulting from the installation and operation of SHM System on board of the helicopter. The overall objective of the PSSHA is to establish that the potential Mi 8/17 helicopter modification does not introduce unacceptable hazard conditions to both the helicopter and personnel. The MIL-STD-882 risk assessment methodology is applied to assess hazards and risk acceptance levels for both hardware and software elements of the SHM system.

Keywords

  • PSSHA
  • Structural Health Monitoring System
  • hazard
  • risk
Open Access

Small UAV SHM System Functional Hazard Analysis

Published Online: 17 Jul 2021
Page range: 33 - 41

Abstract

Abstract

The safety assessment process tailored to Remotely Piloted Aircraft Systems (RPAS) applications has been discussed briefly. The modified Hazard Reference System for STANAG 4703 Category UAV including Non Safety Effect (NSE) severity category has been proposed. The Functional Hazard Analysis (FHA) for small Unmanned Aerial Vehicle (UAV) Structural Health Monitoring (SHM) system has been conducted.

Keywords

  • UAV
  • Structural Health Monitoring system
  • functional hazard analysis
Open Access

Aviation Criminal Law Regulations of the Tokyo Convention and the Penal Code to Counteract Terrorist Acts

Published Online: 17 Jul 2021
Page range: 43 - 62

Abstract

Abstract

The aim of the study is to present issues related to acts of terror and attempts to counteract them, whose subject matter of which is governed by a number of legal acts of various territorial scope, primarily by regulations contained in the Tokyo Convention, which is a source of public international law, and Polish normative acts, such as the Aviation Law together with legal and penal regulations. The paper presents considerations aimed at indicating the proper interpretation of the provisions regulating the obligation to undertake investigative and explanatory actions as part of pre-trial proceedings conducted by the prosecutor, the issues of jurisdiction and competence of the courts adjudicating in criminal cases, and the issues concerning the institution of extradition and its legal basis.

Keywords

  • act of terrorism
  • institution of extradition
  • international and territorial legal acts related to terrorism
  • jurisdiction of adjudicating courts of law
Open Access

Diagnostics of Turbine Blades, Based on Estimation of Frequency Response Function

Published Online: 17 Jul 2021
Page range: 63 - 78

Abstract

Abstract

The aim of the study is to propose a diagnostics method based on blade’s vibration model in frequency domain. Amplitude spectrum A(ω) and phase spectrum φ(ω) have been experimentally identified which define transfer function G(jω) = P(ω) + jQ(ω) and their real P(ω) and imaginary Q(ω) parts. Transfer function G(jω) and resulting frequency, amplitude, phase characteristics and real P(ω) and imaginary Q(ω) parts are parts of blade’s diagnostics model. Changes in those characteristics are directly related to changes in the technical condition of the blades. It has been noticed that small changes in the technical condition cause large changes in frequency characteristics, which proves their usefulness in the diagnosis process.

Keywords

  • modal analysis
  • blade vibration
  • frequency response
  • resonance
  • Bode plot
  • vibration mode
  • operating deflection shape
  • factor
  • vibration spectrum
  • transfer function
  • frequency response function
Open Access

The Impact of Standard Deviation of Wind on the Bomb Flight in Atmospheric Turbulence

Published Online: 17 Jul 2021
Page range: 79 - 91

Abstract

Abstract

The paper provides the simulation results of a small-diameter guided training bomb released during atmospheric turbulence. The simulation utilized a guided bombed devised at ITWL. Aerodynamic characteristics of the bomb were obtained from wind tunnel tests and from calculations made by the PRODAS programme. The simulation programme was developed based on a mathematical model describing a spatial motion of an aerial bomb moving in atmospheric turbulence. To describe a turbulence component, the model of stochastic processes proposed by Shinozuki was used. The manuscript includes examples of diagrams of basic parameters showing the bomb flight in a disturbed atmosphere. The analysis of the impact of the standard deviation of the wind on the change in the parameters of bomb flight was performed. The relationships between the parameters of bomb flight and the possibility to hit the target were provided.

Keywords

  • bomb
  • numerical simulation
  • turbulence of the atmosphere
Open Access

Efficiency Analyse of Airport Commercial Area

Published Online: 17 Jul 2021
Page range: 93 - 101

Abstract

Abstract

The article is focused on analysis of financial cost effectiveness and the utilization of business premises in the terminal building of Bratislava Airport. Our analysis is based on a comparison of sales, profitability, and number of customers of individual newsagents of the GGT a. s. company, which operates three such newsagent stands at the examined airport. Each of the newsagents are located in a different part of the airport terminal, namely Schengen, non-Schengen and check-in area. The examined shops will serve as a practical example of the usability of these areas, and our goal is to find out which of these parts of the Bratislava Airport terminal building is most used by passengers and airport visitors. The data was collected for the period from 1st January 2018 to 31st December 2018, covering one full calendar year, which is a sufficient period for our analysis.

Keywords

  • airport
  • usability
  • efficiency
  • finance
  • cost
Open Access

Use of Electric Motors in the Context of Glider Aviation

Published Online: 17 Jul 2021
Page range: 103 - 115

Abstract

Abstract

In sailplane aviation, I attach great importance to the achieved aerodynamic parameters due to the main idea of sailplane flights, which is the flight of a sailplane without external energy supply for staying in the air and only in favourable weather conditions, e.g. increasing thermal movements of the air. Only during take-off, external devices, such as a winch or a towing plane, can be used. Therefore, the use of a propulsion installed in sailplanes and operating only during take-off is a very convenient solution. This is a step towards facilitating the access to flying for a wider group of people due to the reduction of costs related to the take-off processes, and also increases the level of safety of sailplane flights by enabling the use of propulsion at critical moments of the flight. The study presents the current trends in the development of gliding, in particular motor gliders. Additionally, as a result of research works, the energy storage system was shown, which is the weakest element of the system, and at the same time the one with the greatest development potential.

Keywords

  • transport
  • glider
  • electric motor
  • Li-POL cell
Open Access

Measures Taken by the European Union Agency for Aviation Safety to Ensure Aviation Safety

Published Online: 17 Jul 2021
Page range: 117 - 125

Abstract

Abstract

The author will discuss the subject of aviation safety. The measures taken by EASA to maintain the high standard of aviation safety will be identified. At the same time, the paper will present the genesis of the establishment of the European Union Agency for Aviation Safety.

Keywords

  • EASA
  • aviation safety
  • civil aviation
Open Access

Reaction Wheel Control System for Cubesat Nanosatellite

Published Online: 17 Jul 2021
Page range: 127 - 137

Abstract

Abstract

Nanosatellites, although originally developed for educational purposes, are increasingly being used for commercial sense. Continuous increase in the application and use means that they require continuous improvement of performance to cope with new challenges. An important issue is the control of the position of the satellite sufficiently accurate and fast to enable it to efficiently carry out its mission. This paper includes a project consisting of a modelled test system and a presented method of control with simulation. Then, the obtained results and resulting conclusions are discussed.

Keywords

  • nanosatellite
  • reaction wheels
  • control system
Open Access

The Impact of Technological Changes of PVC Light Partitions and Glazing on the Risk Connected with the Organization of International Transport

Published Online: 17 Jul 2021
Page range: 139 - 151

Abstract

Abstract

The Author of the article proves that in practice the suitable result concerning the balanced development and the effective use of resources should be controlled simultaneously. The setting of the parameters of thermal isolation for constructional products such as light partitions and glazing (windows and doors) with respect to technological development of products is not enough. Production, the product and its transport makes the whole arrangement of processes that influence the entirety resulting from ecology, transport and the effective use of resources. The only way to meet the demands of the strategy described in the EU documents is to implement such product design that assumes for example the optimal transport possibilities.

Keywords

  • transport
  • technology
  • production
  • PVC
  • thermal isolation coefficient
Open Access

Checking Aircraft Engines Adjustment

Published Online: 17 Jul 2021
Page range: 153 - 162

Abstract

Abstract

The paper presents a new approach to the process of regulating the basic parameters of a turbine jet engine. It presents a system for monitoring these parameters developed and put into operation and the creation of the so-called phase mapping of the engine speed increment. Its modular structure is described, which allows it to be adapted quite quickly to other types of aircraft engine units. Individual modules are based on mathematical descriptions from the theory of aircraft engines. The phase mapping of the engine speed indicates a dynamic change of this parameter. On this basis, the characteristic ranges and individual points of engine operation are presented. The following are examples of characteristics and their interpretation.

Keywords

  • turbojet engine
  • aircraft engine
  • aircraft engine adjustment
  • engine speed
  • phase portrait
12 Articles
Open Access

Federated Learning for Spanish Ports as an Aid to Digitization

Published Online: 17 Jul 2021
Page range: 1 - 17

Abstract

Abstract

The Spanish Port System is immersed in the process of digital transformation towards the concept of Ports 4.0. This entails new regulatory and connectivity requirements, making it necessary to implement the new technologies offered by the market towards digitalization. The digitalization of the individual processes in a first step helps the exchange of digital information between the members of the port community. The next step will mean that the information flow between the participants of a port community is done in a reliable, efficient, paperless way, and thanks to technologies. However, for the Spanish port sector, data exchange has a competitive disadvantage. That is why Federated Learning is proposed. This approach allows several organizations in the port sector to collaborate in the development of models, but without the need to directly share sensitive port data among themselves. Instead of gathering data on a single server, the data remains locked on your server, and the algorithms and predictive models travel between them. The goal of this approach is to benefit from a large set of data, which contributes to increased Machine Learning performance while respecting data ownership and privacy. Through an Inter-institution or “Cross-silo FL” model, different institutions contribute to the training with their local datasets in which different companies collaborate in training a learning machine for the discovery of patterns in private datasets of high sensitivity and high content. This environment is characterized by a smaller number of participants than the mobile case, with typically better bandwidth and less intermittency.

Keywords

  • machine learning
  • federated learning
  • data digitalization
Open Access

Preliminary System Safety Hazard Analysis of a Transport Helicopter SHM System

Published Online: 17 Jul 2021
Page range: 19 - 31

Abstract

Abstract

The purpose of this paper is to provide the Mi-8/17 helicopter Structural Health Monitoring (SHM) System Preliminary System Safety Hazard Analysis (PSSHA). The PSSHA identifies and classifies potential hazards, and the actions necessary to reduce or eliminate the risks resulting from the installation and operation of SHM System on board of the helicopter. The overall objective of the PSSHA is to establish that the potential Mi 8/17 helicopter modification does not introduce unacceptable hazard conditions to both the helicopter and personnel. The MIL-STD-882 risk assessment methodology is applied to assess hazards and risk acceptance levels for both hardware and software elements of the SHM system.

Keywords

  • PSSHA
  • Structural Health Monitoring System
  • hazard
  • risk
Open Access

Small UAV SHM System Functional Hazard Analysis

Published Online: 17 Jul 2021
Page range: 33 - 41

Abstract

Abstract

The safety assessment process tailored to Remotely Piloted Aircraft Systems (RPAS) applications has been discussed briefly. The modified Hazard Reference System for STANAG 4703 Category UAV including Non Safety Effect (NSE) severity category has been proposed. The Functional Hazard Analysis (FHA) for small Unmanned Aerial Vehicle (UAV) Structural Health Monitoring (SHM) system has been conducted.

Keywords

  • UAV
  • Structural Health Monitoring system
  • functional hazard analysis
Open Access

Aviation Criminal Law Regulations of the Tokyo Convention and the Penal Code to Counteract Terrorist Acts

Published Online: 17 Jul 2021
Page range: 43 - 62

Abstract

Abstract

The aim of the study is to present issues related to acts of terror and attempts to counteract them, whose subject matter of which is governed by a number of legal acts of various territorial scope, primarily by regulations contained in the Tokyo Convention, which is a source of public international law, and Polish normative acts, such as the Aviation Law together with legal and penal regulations. The paper presents considerations aimed at indicating the proper interpretation of the provisions regulating the obligation to undertake investigative and explanatory actions as part of pre-trial proceedings conducted by the prosecutor, the issues of jurisdiction and competence of the courts adjudicating in criminal cases, and the issues concerning the institution of extradition and its legal basis.

Keywords

  • act of terrorism
  • institution of extradition
  • international and territorial legal acts related to terrorism
  • jurisdiction of adjudicating courts of law
Open Access

Diagnostics of Turbine Blades, Based on Estimation of Frequency Response Function

Published Online: 17 Jul 2021
Page range: 63 - 78

Abstract

Abstract

The aim of the study is to propose a diagnostics method based on blade’s vibration model in frequency domain. Amplitude spectrum A(ω) and phase spectrum φ(ω) have been experimentally identified which define transfer function G(jω) = P(ω) + jQ(ω) and their real P(ω) and imaginary Q(ω) parts. Transfer function G(jω) and resulting frequency, amplitude, phase characteristics and real P(ω) and imaginary Q(ω) parts are parts of blade’s diagnostics model. Changes in those characteristics are directly related to changes in the technical condition of the blades. It has been noticed that small changes in the technical condition cause large changes in frequency characteristics, which proves their usefulness in the diagnosis process.

Keywords

  • modal analysis
  • blade vibration
  • frequency response
  • resonance
  • Bode plot
  • vibration mode
  • operating deflection shape
  • factor
  • vibration spectrum
  • transfer function
  • frequency response function
Open Access

The Impact of Standard Deviation of Wind on the Bomb Flight in Atmospheric Turbulence

Published Online: 17 Jul 2021
Page range: 79 - 91

Abstract

Abstract

The paper provides the simulation results of a small-diameter guided training bomb released during atmospheric turbulence. The simulation utilized a guided bombed devised at ITWL. Aerodynamic characteristics of the bomb were obtained from wind tunnel tests and from calculations made by the PRODAS programme. The simulation programme was developed based on a mathematical model describing a spatial motion of an aerial bomb moving in atmospheric turbulence. To describe a turbulence component, the model of stochastic processes proposed by Shinozuki was used. The manuscript includes examples of diagrams of basic parameters showing the bomb flight in a disturbed atmosphere. The analysis of the impact of the standard deviation of the wind on the change in the parameters of bomb flight was performed. The relationships between the parameters of bomb flight and the possibility to hit the target were provided.

Keywords

  • bomb
  • numerical simulation
  • turbulence of the atmosphere
Open Access

Efficiency Analyse of Airport Commercial Area

Published Online: 17 Jul 2021
Page range: 93 - 101

Abstract

Abstract

The article is focused on analysis of financial cost effectiveness and the utilization of business premises in the terminal building of Bratislava Airport. Our analysis is based on a comparison of sales, profitability, and number of customers of individual newsagents of the GGT a. s. company, which operates three such newsagent stands at the examined airport. Each of the newsagents are located in a different part of the airport terminal, namely Schengen, non-Schengen and check-in area. The examined shops will serve as a practical example of the usability of these areas, and our goal is to find out which of these parts of the Bratislava Airport terminal building is most used by passengers and airport visitors. The data was collected for the period from 1st January 2018 to 31st December 2018, covering one full calendar year, which is a sufficient period for our analysis.

Keywords

  • airport
  • usability
  • efficiency
  • finance
  • cost
Open Access

Use of Electric Motors in the Context of Glider Aviation

Published Online: 17 Jul 2021
Page range: 103 - 115

Abstract

Abstract

In sailplane aviation, I attach great importance to the achieved aerodynamic parameters due to the main idea of sailplane flights, which is the flight of a sailplane without external energy supply for staying in the air and only in favourable weather conditions, e.g. increasing thermal movements of the air. Only during take-off, external devices, such as a winch or a towing plane, can be used. Therefore, the use of a propulsion installed in sailplanes and operating only during take-off is a very convenient solution. This is a step towards facilitating the access to flying for a wider group of people due to the reduction of costs related to the take-off processes, and also increases the level of safety of sailplane flights by enabling the use of propulsion at critical moments of the flight. The study presents the current trends in the development of gliding, in particular motor gliders. Additionally, as a result of research works, the energy storage system was shown, which is the weakest element of the system, and at the same time the one with the greatest development potential.

Keywords

  • transport
  • glider
  • electric motor
  • Li-POL cell
Open Access

Measures Taken by the European Union Agency for Aviation Safety to Ensure Aviation Safety

Published Online: 17 Jul 2021
Page range: 117 - 125

Abstract

Abstract

The author will discuss the subject of aviation safety. The measures taken by EASA to maintain the high standard of aviation safety will be identified. At the same time, the paper will present the genesis of the establishment of the European Union Agency for Aviation Safety.

Keywords

  • EASA
  • aviation safety
  • civil aviation
Open Access

Reaction Wheel Control System for Cubesat Nanosatellite

Published Online: 17 Jul 2021
Page range: 127 - 137

Abstract

Abstract

Nanosatellites, although originally developed for educational purposes, are increasingly being used for commercial sense. Continuous increase in the application and use means that they require continuous improvement of performance to cope with new challenges. An important issue is the control of the position of the satellite sufficiently accurate and fast to enable it to efficiently carry out its mission. This paper includes a project consisting of a modelled test system and a presented method of control with simulation. Then, the obtained results and resulting conclusions are discussed.

Keywords

  • nanosatellite
  • reaction wheels
  • control system
Open Access

The Impact of Technological Changes of PVC Light Partitions and Glazing on the Risk Connected with the Organization of International Transport

Published Online: 17 Jul 2021
Page range: 139 - 151

Abstract

Abstract

The Author of the article proves that in practice the suitable result concerning the balanced development and the effective use of resources should be controlled simultaneously. The setting of the parameters of thermal isolation for constructional products such as light partitions and glazing (windows and doors) with respect to technological development of products is not enough. Production, the product and its transport makes the whole arrangement of processes that influence the entirety resulting from ecology, transport and the effective use of resources. The only way to meet the demands of the strategy described in the EU documents is to implement such product design that assumes for example the optimal transport possibilities.

Keywords

  • transport
  • technology
  • production
  • PVC
  • thermal isolation coefficient
Open Access

Checking Aircraft Engines Adjustment

Published Online: 17 Jul 2021
Page range: 153 - 162

Abstract

Abstract

The paper presents a new approach to the process of regulating the basic parameters of a turbine jet engine. It presents a system for monitoring these parameters developed and put into operation and the creation of the so-called phase mapping of the engine speed increment. Its modular structure is described, which allows it to be adapted quite quickly to other types of aircraft engine units. Individual modules are based on mathematical descriptions from the theory of aircraft engines. The phase mapping of the engine speed indicates a dynamic change of this parameter. On this basis, the characteristic ranges and individual points of engine operation are presented. The following are examples of characteristics and their interpretation.

Keywords

  • turbojet engine
  • aircraft engine
  • aircraft engine adjustment
  • engine speed
  • phase portrait

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