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Volume 19 (2022): Issue 1 (June 2022)

Volume 18 (2021): Issue 2 (December 2021)

Volume 18 (2021): Issue 1 (June 2021)

Volume 17 (2020): Issue 2 (December 2020)

Volume 17 (2020): Issue 1 (June 2020)

Volume 16 (2019): Issue 2 (December 2019)

Volume 16 (2019): Issue 1 (June 2019)

Journal Details
Format
Journal
eISSN
2668-4217
First Published
30 Jul 2019
Publication timeframe
2 times per year
Languages
English

Search

Volume 16 (2019): Issue 2 (December 2019)

Journal Details
Format
Journal
eISSN
2668-4217
First Published
30 Jul 2019
Publication timeframe
2 times per year
Languages
English

Search

8 Articles
Open Access

Cryptocurrency – Sentiment Analysis in Social Media

Published Online: 21 Dec 2019
Page range: 1 - 6

Abstract

Abstract

The paper proposes the exploration, identification and development of a Java solution for extracting the sentiment related to the cryptocurrencies phenomenon, from the content of the posts of certain popular social networks.

Detecting the positive, neutral or negative character of the sentiment is adopted as a relevant method of establishing the nature of the human perception on the topical issue defined by cryptocurrencies.

Keywords

  • cryptocurrency
  • sentiment analysis
  • Stanford CoreNLP
  • IBM Watson
Open Access

The Effect of Squeeze Pin Dimension and Operational Parameters on Material Homogenity of Aluminium High Pressure Die Cast Parts

Published Online: 21 Dec 2019
Page range: 7 - 12

Abstract

Abstract

The present paper is an experimental study on the squeeze pin effect on the high pressure die cast aluminium parts, as a way of improvement of material homogenity on various and big wall thickness castings. Squeeze is used in high pressure die casting technology for optimizing homogenity of big wall thicknesses of die cast parts working as structural, mechanical and hydraulic components, made of different aluminium alloys such AlSi alloys. The objective of this research is to highlight the primary and secondary effects of squeezing on the structural homogenity of high pressure die cast aluminium parts, as well as the dependence of the effects on the squeeze pin dimensions and the operating parameters.

Keywords

  • high pressure die casting
  • AlSi alloy
  • squeeze pin
  • shrinkage
  • cold flow
  • porosity
Open Access

Some Aspects about Theoretical Static Rigidity and Experimental Static Rigidity of a New Elastic Coupling with Cylindical Bolts and Nonmetallic Elements

Published Online: 21 Dec 2019
Page range: 11 - 19

Abstract

Abstract

The elastic couplings are frequently used in mechanical transmissions design, to take over the radial, axial and angular misalignments and also to take over the shocks and the overloads that could appear. In this paper is presenting some aspects about the construction of couplings with bolts using non-metallic elements, e.g. rubber, having different hardness, the elements involved in torque transmission, in this case elastic elements, having also different dimensions or forms, in the way to have a good elasticity and capacity of vibration absorbtion, determining theoretical static rigidity and experimental static rigidity of a new elastic coupling with cylindrical bolts and nonmetallic elements and compare of results for these values.

Keywords

  • elastic coupling
  • non-metallic elements
  • theoretical static rigidity
  • experimental static rigidity
Open Access

The Puzzle Game Between Design, Science and Skills

Published Online: 21 Dec 2019
Page range: 20 - 24

Abstract

Abstract

The present paper presents an alternative method regarding the practical solution of defining the puzzle game in terms of design, graphics, 3D modeling and manufacture of the puzzle game. The practical example of making a puzzle game defined by assembling components resulting the administrative map of Romania.

Keywords

  • AutoCAD
  • Inventor
  • 3D model
  • 3D Printing
  • CorelDraw
  • puzzele game
  • design
  • graphics
Open Access

Study on the Westley Maclean Model and the Co-Orientation Model and their Exemplification in an Industrial Enterprise

Published Online: 21 Dec 2019
Page range: 25 - 28

Abstract

Abstract

The present paper makes an incursion into the new and complex models of communication that can be found in literature, trying to identify their graphic decoding and their applicability in an industrial enterprise. The authors identified real examples for each model under investigation, so the purpose of the paper is to emphasize the importance of communication and the applicability of the new methods of communication in engineering.

Keywords

  • communication
  • communication models
  • communications in industrial enterprise
  • Westley MacLean Model
  • Co-Orientation model
Open Access

Examination of the Types of Erosion and Introduction of Protective Measures to Prevent Soil Loss

Published Online: 21 Dec 2019
Page range: 29 - 33

Abstract

Abstract

Soil erosion is the most important challenge of the biosphere. Soil is one of the most important and most valuable natural resources. It meets the essential needs of the world. If the soil is not well preserved, then hunger will conquer all over the globe. This article tried to identify types of erosion and provide solutions to prevent it to protect this main material by examining the effects and results.

Keywords

  • Soil erosion
  • costs
  • soil preservation
  • vegetation
  • pebbles
Open Access

Aspects on Implementation of an Integrated Waste Management System in the Rural Area

Published Online: 21 Dec 2019
Page range: 34 - 38

Abstract

Abstract

The issue of waste management in terms of environmental protection is one of the important problems facing humanity, especially in the large agglomeration areas, and in the rural area, the interests are more limited.

The present paper presents theoretical aspects regarding the implementation of an integrated waste management system in the rural area.

Keywords

  • strategy
  • renewable resources
  • medium quality
  • management
Open Access

A Generalization of a Result for Iterative Functions in ℝn

Published Online: 21 Dec 2019
Page range: 39 - 41

Abstract

Abstract

The purpose of this paper is to generalize for real vector-valued functions of a result for real iterative functions and to give some applications for nonlinear system of equations.

Keywords

  • nonlinear equations
  • nonlinear system of equations
  • Banach fixed point theorem
  • mean value theorem for real vector-valued functions
8 Articles
Open Access

Cryptocurrency – Sentiment Analysis in Social Media

Published Online: 21 Dec 2019
Page range: 1 - 6

Abstract

Abstract

The paper proposes the exploration, identification and development of a Java solution for extracting the sentiment related to the cryptocurrencies phenomenon, from the content of the posts of certain popular social networks.

Detecting the positive, neutral or negative character of the sentiment is adopted as a relevant method of establishing the nature of the human perception on the topical issue defined by cryptocurrencies.

Keywords

  • cryptocurrency
  • sentiment analysis
  • Stanford CoreNLP
  • IBM Watson
Open Access

The Effect of Squeeze Pin Dimension and Operational Parameters on Material Homogenity of Aluminium High Pressure Die Cast Parts

Published Online: 21 Dec 2019
Page range: 7 - 12

Abstract

Abstract

The present paper is an experimental study on the squeeze pin effect on the high pressure die cast aluminium parts, as a way of improvement of material homogenity on various and big wall thickness castings. Squeeze is used in high pressure die casting technology for optimizing homogenity of big wall thicknesses of die cast parts working as structural, mechanical and hydraulic components, made of different aluminium alloys such AlSi alloys. The objective of this research is to highlight the primary and secondary effects of squeezing on the structural homogenity of high pressure die cast aluminium parts, as well as the dependence of the effects on the squeeze pin dimensions and the operating parameters.

Keywords

  • high pressure die casting
  • AlSi alloy
  • squeeze pin
  • shrinkage
  • cold flow
  • porosity
Open Access

Some Aspects about Theoretical Static Rigidity and Experimental Static Rigidity of a New Elastic Coupling with Cylindical Bolts and Nonmetallic Elements

Published Online: 21 Dec 2019
Page range: 11 - 19

Abstract

Abstract

The elastic couplings are frequently used in mechanical transmissions design, to take over the radial, axial and angular misalignments and also to take over the shocks and the overloads that could appear. In this paper is presenting some aspects about the construction of couplings with bolts using non-metallic elements, e.g. rubber, having different hardness, the elements involved in torque transmission, in this case elastic elements, having also different dimensions or forms, in the way to have a good elasticity and capacity of vibration absorbtion, determining theoretical static rigidity and experimental static rigidity of a new elastic coupling with cylindrical bolts and nonmetallic elements and compare of results for these values.

Keywords

  • elastic coupling
  • non-metallic elements
  • theoretical static rigidity
  • experimental static rigidity
Open Access

The Puzzle Game Between Design, Science and Skills

Published Online: 21 Dec 2019
Page range: 20 - 24

Abstract

Abstract

The present paper presents an alternative method regarding the practical solution of defining the puzzle game in terms of design, graphics, 3D modeling and manufacture of the puzzle game. The practical example of making a puzzle game defined by assembling components resulting the administrative map of Romania.

Keywords

  • AutoCAD
  • Inventor
  • 3D model
  • 3D Printing
  • CorelDraw
  • puzzele game
  • design
  • graphics
Open Access

Study on the Westley Maclean Model and the Co-Orientation Model and their Exemplification in an Industrial Enterprise

Published Online: 21 Dec 2019
Page range: 25 - 28

Abstract

Abstract

The present paper makes an incursion into the new and complex models of communication that can be found in literature, trying to identify their graphic decoding and their applicability in an industrial enterprise. The authors identified real examples for each model under investigation, so the purpose of the paper is to emphasize the importance of communication and the applicability of the new methods of communication in engineering.

Keywords

  • communication
  • communication models
  • communications in industrial enterprise
  • Westley MacLean Model
  • Co-Orientation model
Open Access

Examination of the Types of Erosion and Introduction of Protective Measures to Prevent Soil Loss

Published Online: 21 Dec 2019
Page range: 29 - 33

Abstract

Abstract

Soil erosion is the most important challenge of the biosphere. Soil is one of the most important and most valuable natural resources. It meets the essential needs of the world. If the soil is not well preserved, then hunger will conquer all over the globe. This article tried to identify types of erosion and provide solutions to prevent it to protect this main material by examining the effects and results.

Keywords

  • Soil erosion
  • costs
  • soil preservation
  • vegetation
  • pebbles
Open Access

Aspects on Implementation of an Integrated Waste Management System in the Rural Area

Published Online: 21 Dec 2019
Page range: 34 - 38

Abstract

Abstract

The issue of waste management in terms of environmental protection is one of the important problems facing humanity, especially in the large agglomeration areas, and in the rural area, the interests are more limited.

The present paper presents theoretical aspects regarding the implementation of an integrated waste management system in the rural area.

Keywords

  • strategy
  • renewable resources
  • medium quality
  • management
Open Access

A Generalization of a Result for Iterative Functions in ℝn

Published Online: 21 Dec 2019
Page range: 39 - 41

Abstract

Abstract

The purpose of this paper is to generalize for real vector-valued functions of a result for real iterative functions and to give some applications for nonlinear system of equations.

Keywords

  • nonlinear equations
  • nonlinear system of equations
  • Banach fixed point theorem
  • mean value theorem for real vector-valued functions

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