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Volume 27 (2021): Edizione 3 (September 2021)

Volume 27 (2021): Edizione 2 (June 2021)

Volume 27 (2021): Edizione 1 (March 2021)

Volume 26 (2020): Edizione 4 (December 2020)

Volume 26 (2020): Edizione 3 (September 2020)

Volume 26 (2020): Edizione 2 (June 2020)

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Volume 25 (2019): Edizione 25 (December 2019)

Volume 24 (2019): Edizione 24 (September 2019)

Volume 23 (2019): Edizione 23 (June 2019)

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Volume 20 (2018): Edizione 20 (September 2018)

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Dettagli della rivista
Formato
Rivista
eISSN
2353-7779
Pubblicato per la prima volta
30 Mar 2018
Periodo di pubblicazione
4 volte all'anno
Lingue
Inglese

Cerca

Volume 23 (2019): Edizione 23 (June 2019)

Dettagli della rivista
Formato
Rivista
eISSN
2353-7779
Pubblicato per la prima volta
30 Mar 2018
Periodo di pubblicazione
4 volte all'anno
Lingue
Inglese

Cerca

8 Articoli
access type Accesso libero

Multi-criteria decision analysis for simplified evaluation of clean energy technologies

Pubblicato online: 27 Jul 2019
Pagine: 3 - 11

Astratto

Abstract

Technology assessment (TA) is not a new concept. High value energy technology identification needs to be followed by a decision process in which all shareholders contribute. A case study on Combined and Heat Power (CHP) technologies considered is presented to illustrate the applicability of fuzzy analytical hierarchy assessment approach (FAHP). The goal of this paper is to identify and evaluate the best variant of CHP technologies using multi-criteria that are technical feasibly and cost effective reflecting performance parameters. The results depict that technology A2 with an overall ranking of 0.438 is the best alternative compared to others. Taking into consideration decision parameters for the section, A1 is found to be relatively most important with a rating of 0.434 with its reliability and cost effectiveness. The presented fuzzy-based methodology is general expected to be used by a diverse target groups in energy sectors.

Parole chiave

  • Clean energy technology
  • Multi-criteria analysis
access type Accesso libero

Problems of use of FMEA method in industrial enterprise

Pubblicato online: 27 Jul 2019
Pagine: 12 - 17

Astratto

Abstract

Presented paper concentrate on problems connected with FMEA method usage in industrial enterprise. There is in the paper a description of the basic rules of FMEA method and competition between FMEA analysis and gap analysis. The analysis of defects has been done to find recommendations how to eliminate or restrain them. On the basis of conducted research we found that selection of staff to the team is very important factor in the FMEA analysis undertaking process. The staff should have appropriate level of knowledge about FMEA method methodology and other tools which are indispensable in the process of implementing this method within the company.

Parole chiave

  • FMEA
  • Failure Mode and Effect
  • Analysis
  • Quality planning
  • quality improvement
  • quality methods
access type Accesso libero

Implementation of Six Sigma methodology using DMAIC to achieve processes improvement in railway transport

Pubblicato online: 27 Jul 2019
Pagine: 18 - 21

Astratto

Abstract

The provision of quality transport services is a prerequisite for the creation of an efficient organization that can meet the expectations and requirements of both the enterprise itself and its customers. From the railway enterprise's point of view, it is necessary to pay attention to the increasingly demanding requirements of its customers in railway passenger transport. This article focuses on identifying defects in rail transport processes that negatively affect ordinary operations. One of the most serious bottlenecks affecting railway transport reliability is the train delay, which fundamentally affects the perception of railway transport. At the same time, it emphasizes the need to apply individual tools according to the DMAIC cycle in order to achieve continuous improvement. The aim of the implemented Six Sigma methodology in railway enterprise is disciplined application of statistical problem-solving tools to recognize the gaps in the transport process and set out individual steps for their gradual removal.

Parole chiave

  • Six Sigma methodology
  • DMAIC cycle
  • railway transport
  • train delays
  • transport services
access type Accesso libero

Analysis of the implementation of the identification system for directly marked parts - DataMatrix code

Pubblicato online: 27 Jul 2019
Pagine: 22 - 26

Astratto

Abstract

A photocode in Polish is a common name for a two-dimensional code, which is characterized by higher information capacity than a traditional barcode. The paper analyses the use of the two-dimensional coding system - DataMatrix to identify and classify the material stream in the production process. The analysis showed the effectiveness of the implementation of the coding system in the context of increased availability, machine use and increased product quality. The improvement in the production process is confirmed by an increase in the OEE index. As part of further improvement measures, the coding system should be implemented throughout the enterprise, its compatibility with existing systems should be ensured and applied to all products.

Parole chiave

  • One-dimensional code
  • Two-dimensional code
  • DataMatrix code
  • Production engineering
access type Accesso libero

Mechanical and mathematical research of local deformations of a steel roller shell with a variable geometry of contact surface

Pubblicato online: 27 Jul 2019
Pagine: 27 - 35

Astratto

Abstract

The article is devoted to solving the fundamental and applied problem of nonlinear structural mechanics of machines by introducing into the drum two additional stop cylinders with supporting rollers at the end and adjustable length, providing a given elliptical or circular shape of a flexible shell with a smoothly variable geometry in the area of its contact with compacted pavement material. Compaction of soil, gravel and asphalt concrete in the sphere of road is not only an integral part of the technological process of the roadbed, road foundation and surface construction, but it is actually the main operation to ensure their strength, stability and durability. The quality, cost and speed of road construction, the possibility of using fundamentally new technologies, structures and materials is largely determined by the availability of modern road machinery.

Parole chiave

  • Road roller
  • shell
  • force
  • stress
access type Accesso libero

Electric aircraft - present and future

Pubblicato online: 27 Jul 2019
Pagine: 36 - 40

Astratto

Abstract

In this paper, an outlook about the present of electrical aviation is given. The relatively small energy density of current battery technologies is adequate to build usable electric car, but not suitable for electric aircraft. Because of the very limited amount of energy available on-board, a couple of percent in efficiency can give significant increase in range and flight time, hence the development of more efficient propulsion system and E-motor is as important as the development of battery technologies. Current research results at the University of Dunaujvaros show, that building E-motors from amorphous materials is possible, and can easily increase the efficiency of high speed E-motors.

Parole chiave

  • electric aircraft
  • hybrid aircraft
  • amorphous material
  • electric motor development
access type Accesso libero

The impact of composition dependent and process-related properties in the laser cutting of metallic glassy tapes

Pubblicato online: 27 Jul 2019
Pagine: 41 - 46

Astratto

Abstract

A short survey is reported on the advantageous and disadvantageous properties of soft magnetic glassy tapes to build stator and rotor elements for the increase of motor efficiency. The relative high saturation magnetization and the relative permeability of these alloy groups seem to be promising in this application field. On the other hand, the sample thickness (30 µm) displays limitations in terms of a filling factor. High hardness of tapes hinders the effectivity of mechanical shaping. Laser cutting can be successful as shaping method, presuming that the extension (thickness) of heat affected zone (HAZ) can be successfully reduced below 50µm, avoiding the brittleness evolution.

Parole chiave

  • laser cutting of metallic glassy tapes
  • brittleness evolution
  • thickness of tapes against filling factor
access type Accesso libero

The delocalization of production to Poland

Pubblicato online: 27 Jul 2019
Pagine: 47 - 52

Astratto

Abstract

This paper presents some aspects of the process of services, products and manufacturing transfer, with the associated production resources, from other locations and plants to Poland.

The study was carried out on the basis of an analysis of publications about delocalization as well as by means of desk research, where there were used the accessible primary and secondary data such as branch reports, statistical data available in reports, data bases, and information accessible on Polish and European websites. The article is also the result of the author's experience of participation in the relocation of a number of international companies, regarding various industries. Delocalization in Poland was presented both from the point of view of Conceptualizing delocalization (literature review, theoretical position) and Implementation of production.

The delocalization mainly takes advantage of labor forces. On the other hand, it may also concern innovative activities and develop high-tech for regions affected by economic restructuring. The social policies for the risk mitigation of the delocalization of production are also being developed and implemented. This work clarifying the conditions of delocalization in Poland and highlight the important roles played by innovation and institutions for achieving sustainability.

Parole chiave

  • production delocalization
  • relocation
  • globalization
  • Polish economy
8 Articoli
access type Accesso libero

Multi-criteria decision analysis for simplified evaluation of clean energy technologies

Pubblicato online: 27 Jul 2019
Pagine: 3 - 11

Astratto

Abstract

Technology assessment (TA) is not a new concept. High value energy technology identification needs to be followed by a decision process in which all shareholders contribute. A case study on Combined and Heat Power (CHP) technologies considered is presented to illustrate the applicability of fuzzy analytical hierarchy assessment approach (FAHP). The goal of this paper is to identify and evaluate the best variant of CHP technologies using multi-criteria that are technical feasibly and cost effective reflecting performance parameters. The results depict that technology A2 with an overall ranking of 0.438 is the best alternative compared to others. Taking into consideration decision parameters for the section, A1 is found to be relatively most important with a rating of 0.434 with its reliability and cost effectiveness. The presented fuzzy-based methodology is general expected to be used by a diverse target groups in energy sectors.

Parole chiave

  • Clean energy technology
  • Multi-criteria analysis
access type Accesso libero

Problems of use of FMEA method in industrial enterprise

Pubblicato online: 27 Jul 2019
Pagine: 12 - 17

Astratto

Abstract

Presented paper concentrate on problems connected with FMEA method usage in industrial enterprise. There is in the paper a description of the basic rules of FMEA method and competition between FMEA analysis and gap analysis. The analysis of defects has been done to find recommendations how to eliminate or restrain them. On the basis of conducted research we found that selection of staff to the team is very important factor in the FMEA analysis undertaking process. The staff should have appropriate level of knowledge about FMEA method methodology and other tools which are indispensable in the process of implementing this method within the company.

Parole chiave

  • FMEA
  • Failure Mode and Effect
  • Analysis
  • Quality planning
  • quality improvement
  • quality methods
access type Accesso libero

Implementation of Six Sigma methodology using DMAIC to achieve processes improvement in railway transport

Pubblicato online: 27 Jul 2019
Pagine: 18 - 21

Astratto

Abstract

The provision of quality transport services is a prerequisite for the creation of an efficient organization that can meet the expectations and requirements of both the enterprise itself and its customers. From the railway enterprise's point of view, it is necessary to pay attention to the increasingly demanding requirements of its customers in railway passenger transport. This article focuses on identifying defects in rail transport processes that negatively affect ordinary operations. One of the most serious bottlenecks affecting railway transport reliability is the train delay, which fundamentally affects the perception of railway transport. At the same time, it emphasizes the need to apply individual tools according to the DMAIC cycle in order to achieve continuous improvement. The aim of the implemented Six Sigma methodology in railway enterprise is disciplined application of statistical problem-solving tools to recognize the gaps in the transport process and set out individual steps for their gradual removal.

Parole chiave

  • Six Sigma methodology
  • DMAIC cycle
  • railway transport
  • train delays
  • transport services
access type Accesso libero

Analysis of the implementation of the identification system for directly marked parts - DataMatrix code

Pubblicato online: 27 Jul 2019
Pagine: 22 - 26

Astratto

Abstract

A photocode in Polish is a common name for a two-dimensional code, which is characterized by higher information capacity than a traditional barcode. The paper analyses the use of the two-dimensional coding system - DataMatrix to identify and classify the material stream in the production process. The analysis showed the effectiveness of the implementation of the coding system in the context of increased availability, machine use and increased product quality. The improvement in the production process is confirmed by an increase in the OEE index. As part of further improvement measures, the coding system should be implemented throughout the enterprise, its compatibility with existing systems should be ensured and applied to all products.

Parole chiave

  • One-dimensional code
  • Two-dimensional code
  • DataMatrix code
  • Production engineering
access type Accesso libero

Mechanical and mathematical research of local deformations of a steel roller shell with a variable geometry of contact surface

Pubblicato online: 27 Jul 2019
Pagine: 27 - 35

Astratto

Abstract

The article is devoted to solving the fundamental and applied problem of nonlinear structural mechanics of machines by introducing into the drum two additional stop cylinders with supporting rollers at the end and adjustable length, providing a given elliptical or circular shape of a flexible shell with a smoothly variable geometry in the area of its contact with compacted pavement material. Compaction of soil, gravel and asphalt concrete in the sphere of road is not only an integral part of the technological process of the roadbed, road foundation and surface construction, but it is actually the main operation to ensure their strength, stability and durability. The quality, cost and speed of road construction, the possibility of using fundamentally new technologies, structures and materials is largely determined by the availability of modern road machinery.

Parole chiave

  • Road roller
  • shell
  • force
  • stress
access type Accesso libero

Electric aircraft - present and future

Pubblicato online: 27 Jul 2019
Pagine: 36 - 40

Astratto

Abstract

In this paper, an outlook about the present of electrical aviation is given. The relatively small energy density of current battery technologies is adequate to build usable electric car, but not suitable for electric aircraft. Because of the very limited amount of energy available on-board, a couple of percent in efficiency can give significant increase in range and flight time, hence the development of more efficient propulsion system and E-motor is as important as the development of battery technologies. Current research results at the University of Dunaujvaros show, that building E-motors from amorphous materials is possible, and can easily increase the efficiency of high speed E-motors.

Parole chiave

  • electric aircraft
  • hybrid aircraft
  • amorphous material
  • electric motor development
access type Accesso libero

The impact of composition dependent and process-related properties in the laser cutting of metallic glassy tapes

Pubblicato online: 27 Jul 2019
Pagine: 41 - 46

Astratto

Abstract

A short survey is reported on the advantageous and disadvantageous properties of soft magnetic glassy tapes to build stator and rotor elements for the increase of motor efficiency. The relative high saturation magnetization and the relative permeability of these alloy groups seem to be promising in this application field. On the other hand, the sample thickness (30 µm) displays limitations in terms of a filling factor. High hardness of tapes hinders the effectivity of mechanical shaping. Laser cutting can be successful as shaping method, presuming that the extension (thickness) of heat affected zone (HAZ) can be successfully reduced below 50µm, avoiding the brittleness evolution.

Parole chiave

  • laser cutting of metallic glassy tapes
  • brittleness evolution
  • thickness of tapes against filling factor
access type Accesso libero

The delocalization of production to Poland

Pubblicato online: 27 Jul 2019
Pagine: 47 - 52

Astratto

Abstract

This paper presents some aspects of the process of services, products and manufacturing transfer, with the associated production resources, from other locations and plants to Poland.

The study was carried out on the basis of an analysis of publications about delocalization as well as by means of desk research, where there were used the accessible primary and secondary data such as branch reports, statistical data available in reports, data bases, and information accessible on Polish and European websites. The article is also the result of the author's experience of participation in the relocation of a number of international companies, regarding various industries. Delocalization in Poland was presented both from the point of view of Conceptualizing delocalization (literature review, theoretical position) and Implementation of production.

The delocalization mainly takes advantage of labor forces. On the other hand, it may also concern innovative activities and develop high-tech for regions affected by economic restructuring. The social policies for the risk mitigation of the delocalization of production are also being developed and implemented. This work clarifying the conditions of delocalization in Poland and highlight the important roles played by innovation and institutions for achieving sustainability.

Parole chiave

  • production delocalization
  • relocation
  • globalization
  • Polish economy

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