Magazine et Edition

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Volume 3 (2007): Edition 2007 (January 2007)

Détails du magazine
Format
Magazine
eISSN
2083-4608
Première publication
26 Feb 2008
Période de publication
4 fois par an
Langues
Anglais

Chercher

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

Détails du magazine
Format
Magazine
eISSN
2083-4608
Première publication
26 Feb 2008
Période de publication
4 fois par an
Langues
Anglais

Chercher

9 Articles
Accès libre

The Impact of the Reliability of Teleinformation Systems on the Quality of Transmitted Information

Publié en ligne: 30 Nov 2016
Pages: 5 - 20

Résumé

Abstract

The work describes the impact the reliability of the information quality IQ for information and communication systems. One of the components of IQ is the reliability properties such as relativity, accuracy, timeliness, completeness, consistency, adequacy, accessibility, credibility, congruence. Each of these components of IQ is independent and to properly estimate the value of IQ, use one of the methods of modeling uncertainty. In this article, we used a hybrid method that has been developed jointly by one of the authors. This method is based on the mathematical theory of evidence know as Dempstera-Shafera (DS) theory and serial links of dependent hybrid named IQ (hyb).

Mots clés

  • modeling
  • reliability
  • information quality
  • information and communications technology
Accès libre

Reliability of IP Tunnels in Military Networks

Publié en ligne: 30 Nov 2016
Pages: 21 - 40

Résumé

Abstract

The military networks, contrary to commercial ones, require standards which provide the highest level of security and reliability. The process to assuring redundancy of the main connections through applying various protocols and transmission media causes problem with time needed to re-establish virtual tunnels between different locations in case of damaged link. This article compares reliability of different IP (Internet Protocol) tunnels, which were implemented on military network devices.

Mots clés

  • reliability
  • IP
  • tunneling
Accès libre

Bring Your Own Device - Providing Reliable Model of Data Access

Publié en ligne: 30 Nov 2016
Pages: 41 - 56

Résumé

Abstract

The article presents a model of Bring Your Own Device (BYOD) as a model network, which provides the user reliable access to network resources. BYOD is a model dynamically developing, which can be applied in many areas. Research network has been launched in order to carry out the test, in which as a service of BYOD model Work Folders service was used. This service allows the user to synchronize files between the device and the server. An access to the network is completed through the wireless communication by the 802.11n standard. Obtained results are shown and analyzed in this article.

Mots clés

  • availability
  • reliability
  • BYOD
  • data transfer
Accès libre

Network Reliability with Use of Various Transmission Media

Publié en ligne: 30 Nov 2016
Pages: 57 - 78

Résumé

Abstract

The article refers to the impact of damage and dynamic variables on operation of routing protocols and consequently to the whole network (Technical Object - TO) determining its reliability and effectiveness. On this purpose, there was introduced the characteristic of the routing protocols and both an internal and an exterior gateway. Then, it was built the network architecture based on the TCP/IP stack. In the stack, there were created three autonomous systems and one of them was the backbone of the network. What is more, reliability tests, which have been performed, consisted of a resistance to physical damage to the network and dynamically changing parameters of the network as well as performance test.

Mots clés

  • reliability
  • routing
  • network protocols
Accès libre

Influence of Malfunctions of Selected Bus Subsystems on Bus Transportation Safety

Publié en ligne: 30 Nov 2016
Pages: 79 - 96

Résumé

Abstract

This article introduces division of transport systems into land transport systems (road and rail) as well as land and water transport systems (inland and sea), depending on the type of environment in which these systems carry out their tasks. Such systems comprise the class of social engineering systems of the Man – Technological Object – Environment (M – TO – E) type. Such systems are influenced by forcing factors, leading to changes in their condition. Such factors may be divided into operational, external and anthropotechnical and they cause the degradation of the system on various levels, including a decrease of the degree of its safety. The article attempts to evaluate the safety of the operation of transport systems on the basis of the evaluation of the safety of the transport process carried out over a defined time interval Δt. The evaluation of the safety of the implemented transport process was prepared on the basis of a set of calculated index values determined depending on the type of transport.

Mots clés

  • safety
  • undesirable event
  • transport system
Accès libre

Sediment as a Problem in Fame Storage

Publié en ligne: 30 Nov 2016
Pages: 97 - 118

Résumé

Abstract

This article characterizes circumstances associated with the formation of sediment in FAME and factors intensifying this process. It describes the formation of sediment due to oxidation of FAME and the precipitation of sediment in low temperatures of storage which relates to the raw material nature and incomplete production process of FAME. It indicates more causes of sediment’s formation originating from the incompatibility of construction materials used in logistics and microbiological contamination.

Mots clés

  • FAME
  • fuel
  • storage
  • sediment
Accès libre

Analysis of Dynamic Response of Tramway on Tracks with Varying Level of Maintenance

Publié en ligne: 30 Nov 2016
Pages: 119 - 140

Résumé

Abstract

The paper presents feature of geometric track irregularities occurring on tram infrastructure with varying levels of maintenance and their influence on vehicle’s dynamic response. Measurements of vehicle’s model masses accelerations were conducted during rides on chosen track sections projecting real geometry. Frequency characteristics of vibration accelerations obtained from simulation and spectra of measured track irregularities were shown and compared to find the relationship between them.

Mots clés

  • tramway infrastructure
  • exploitation
  • tramway tracks geometry
Accès libre

The Lubricity and Rheological Properties of Magnetorheological Fluids

Publié en ligne: 30 Nov 2016
Pages: 141 - 158

Résumé

Abstract

The article presents results of tribological research carried on four ball tester and dynamic rheometer for different magnetorheological fluids. The wear test was conducted with and without magnetic field. The dynamic rheology measurement was done at wide range of velocity. The inteligent fluids differed from each other by an amount of solid phase and kind of base liquid.

Mots clés

  • lubricity
  • wear
  • magnetorheological fluids
  • inteligent fluids
Accès libre

The Risk of Striking Accidents During LPG Ships Passage in Ports in Respect to Technical Failures based on Real Time Simulations in Szczecin-Świnoujście Waterway

Publié en ligne: 30 Nov 2016
Pages: 159 - 180

Résumé

Abstract

The method of risk assessment based on ship systems technical failures during the passage in the region of Świnoujście of the large LPG (liquefied petroleum gas) tanker is presented. The statistical reliability indicators and the simulation model of ships manoeuvring. The researches carried out within this paper let to determine the safety level and necessary tug escort service during the passage of the ship with the hazardous cargo in the port area.

Mots clés

  • ships technical failures
  • navigational accidents
  • LPG tanker
  • accidents in ports
9 Articles
Accès libre

The Impact of the Reliability of Teleinformation Systems on the Quality of Transmitted Information

Publié en ligne: 30 Nov 2016
Pages: 5 - 20

Résumé

Abstract

The work describes the impact the reliability of the information quality IQ for information and communication systems. One of the components of IQ is the reliability properties such as relativity, accuracy, timeliness, completeness, consistency, adequacy, accessibility, credibility, congruence. Each of these components of IQ is independent and to properly estimate the value of IQ, use one of the methods of modeling uncertainty. In this article, we used a hybrid method that has been developed jointly by one of the authors. This method is based on the mathematical theory of evidence know as Dempstera-Shafera (DS) theory and serial links of dependent hybrid named IQ (hyb).

Mots clés

  • modeling
  • reliability
  • information quality
  • information and communications technology
Accès libre

Reliability of IP Tunnels in Military Networks

Publié en ligne: 30 Nov 2016
Pages: 21 - 40

Résumé

Abstract

The military networks, contrary to commercial ones, require standards which provide the highest level of security and reliability. The process to assuring redundancy of the main connections through applying various protocols and transmission media causes problem with time needed to re-establish virtual tunnels between different locations in case of damaged link. This article compares reliability of different IP (Internet Protocol) tunnels, which were implemented on military network devices.

Mots clés

  • reliability
  • IP
  • tunneling
Accès libre

Bring Your Own Device - Providing Reliable Model of Data Access

Publié en ligne: 30 Nov 2016
Pages: 41 - 56

Résumé

Abstract

The article presents a model of Bring Your Own Device (BYOD) as a model network, which provides the user reliable access to network resources. BYOD is a model dynamically developing, which can be applied in many areas. Research network has been launched in order to carry out the test, in which as a service of BYOD model Work Folders service was used. This service allows the user to synchronize files between the device and the server. An access to the network is completed through the wireless communication by the 802.11n standard. Obtained results are shown and analyzed in this article.

Mots clés

  • availability
  • reliability
  • BYOD
  • data transfer
Accès libre

Network Reliability with Use of Various Transmission Media

Publié en ligne: 30 Nov 2016
Pages: 57 - 78

Résumé

Abstract

The article refers to the impact of damage and dynamic variables on operation of routing protocols and consequently to the whole network (Technical Object - TO) determining its reliability and effectiveness. On this purpose, there was introduced the characteristic of the routing protocols and both an internal and an exterior gateway. Then, it was built the network architecture based on the TCP/IP stack. In the stack, there were created three autonomous systems and one of them was the backbone of the network. What is more, reliability tests, which have been performed, consisted of a resistance to physical damage to the network and dynamically changing parameters of the network as well as performance test.

Mots clés

  • reliability
  • routing
  • network protocols
Accès libre

Influence of Malfunctions of Selected Bus Subsystems on Bus Transportation Safety

Publié en ligne: 30 Nov 2016
Pages: 79 - 96

Résumé

Abstract

This article introduces division of transport systems into land transport systems (road and rail) as well as land and water transport systems (inland and sea), depending on the type of environment in which these systems carry out their tasks. Such systems comprise the class of social engineering systems of the Man – Technological Object – Environment (M – TO – E) type. Such systems are influenced by forcing factors, leading to changes in their condition. Such factors may be divided into operational, external and anthropotechnical and they cause the degradation of the system on various levels, including a decrease of the degree of its safety. The article attempts to evaluate the safety of the operation of transport systems on the basis of the evaluation of the safety of the transport process carried out over a defined time interval Δt. The evaluation of the safety of the implemented transport process was prepared on the basis of a set of calculated index values determined depending on the type of transport.

Mots clés

  • safety
  • undesirable event
  • transport system
Accès libre

Sediment as a Problem in Fame Storage

Publié en ligne: 30 Nov 2016
Pages: 97 - 118

Résumé

Abstract

This article characterizes circumstances associated with the formation of sediment in FAME and factors intensifying this process. It describes the formation of sediment due to oxidation of FAME and the precipitation of sediment in low temperatures of storage which relates to the raw material nature and incomplete production process of FAME. It indicates more causes of sediment’s formation originating from the incompatibility of construction materials used in logistics and microbiological contamination.

Mots clés

  • FAME
  • fuel
  • storage
  • sediment
Accès libre

Analysis of Dynamic Response of Tramway on Tracks with Varying Level of Maintenance

Publié en ligne: 30 Nov 2016
Pages: 119 - 140

Résumé

Abstract

The paper presents feature of geometric track irregularities occurring on tram infrastructure with varying levels of maintenance and their influence on vehicle’s dynamic response. Measurements of vehicle’s model masses accelerations were conducted during rides on chosen track sections projecting real geometry. Frequency characteristics of vibration accelerations obtained from simulation and spectra of measured track irregularities were shown and compared to find the relationship between them.

Mots clés

  • tramway infrastructure
  • exploitation
  • tramway tracks geometry
Accès libre

The Lubricity and Rheological Properties of Magnetorheological Fluids

Publié en ligne: 30 Nov 2016
Pages: 141 - 158

Résumé

Abstract

The article presents results of tribological research carried on four ball tester and dynamic rheometer for different magnetorheological fluids. The wear test was conducted with and without magnetic field. The dynamic rheology measurement was done at wide range of velocity. The inteligent fluids differed from each other by an amount of solid phase and kind of base liquid.

Mots clés

  • lubricity
  • wear
  • magnetorheological fluids
  • inteligent fluids
Accès libre

The Risk of Striking Accidents During LPG Ships Passage in Ports in Respect to Technical Failures based on Real Time Simulations in Szczecin-Świnoujście Waterway

Publié en ligne: 30 Nov 2016
Pages: 159 - 180

Résumé

Abstract

The method of risk assessment based on ship systems technical failures during the passage in the region of Świnoujście of the large LPG (liquefied petroleum gas) tanker is presented. The statistical reliability indicators and the simulation model of ships manoeuvring. The researches carried out within this paper let to determine the safety level and necessary tug escort service during the passage of the ship with the hazardous cargo in the port area.

Mots clés

  • ships technical failures
  • navigational accidents
  • LPG tanker
  • accidents in ports

Planifiez votre conférence à distance avec Sciendo