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

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.

Open access
Cryptocurrency – Sentiment Analysis in Social Media

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.

Open access
Cyberattack — Examples of Threats

Abstract

The purpose of this article is to present selected threats that may affect the security of IT systems caused by cyberattacks coming from cyberspace, as well as to prescribe the results that could be caused by the failure to implement security measures to protect information system (IS).

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

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.

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

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.

Open access
A Generalization of a Result for Iterative Functions in ℝ n

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.

Open access
A Generalization of Difference Models of the Bittner Operational Calculus

Abstract

In the paper, there has been constructed a discrete model of the non-classical Bittner operational calculus with a derivative understood as the operation S b{x(k)} := {x(k+n)b(k)x(k)}, which is a generalization of the n th-order forward difference. It has also been pointed out that there is a possibility to generalize operational calculus models with backward and central differences of higher orders.

Open access
Perspectives of Autonomous Systems in Military Applications

Abstract

In the field of communication on land and in the air, there are already functioning fully or partially autonomous devices. However, it is difficult to point to similar solutions regarding autonomous systems, especially in military applications.

The article formulates development perspectives for marine autonomous systems in military applications, taking into account achieved benefits, requirements and development restrictions. Many interesting places devoted to the security of autonomous systems, on the clear improvement of the security situation with the above-mentioned systems, equipment and machines for maintenance, management devices, autonomous systems, controls and controls, devices for carrying out operations.

The recommendations indicate the need to implement joint projects in the field of the development of autonomous marine technologies and are critical in the previous activities undertaken in this field of research.

Open access
Phenomenon of Icing and a Review of Ice Accretion Nomograms, Models and Charts in Navigation

Abstract

The paper presents results of research based on analysis of marine icing nomograms, models and charts using in the sea navigation. The problem of ships icing occurs in specific weather and geographical conditions. Every year numbers of vessels navigate in these areas meet a phenomenon of icing. Ice on decks of ships can be formed from fresh water or sea (salt) water. Ships operating in waters where the phenomime of icing is occurred use for safety navigation icing nomograms and icing charts. Icing charts are created based on icing models.

The main aim of the article is to perform a review of currently used in the sea navigation icing nomograms and icing maps, based on icing models, used in navigation to depict the phenomenon of icing.

Open access
The Puzzle Game Between Design, Science and Skills

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.

Open access