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This paper studies the Roșia Jiu quarry area in Romania. This research highlights the working method of hydraulic excavators and the values of particles released into the atmosphere by them. Improving technological equipment not only helps build a better world, but also restores and preserves the environment. The measurements were made during 2020, using DSM501A sensors, which were located at four points in the quarry, namely in the north, southeast and west of the quarry.

As a result of the exploitation of coal in the mines from the Jiu Valley, significant quantities of tailings result from the mining works, but also from the coal preparation processes. They are stored in piles of different sizes, placed on the ground horizontally or between mountains, piles called tailings dumps. For the construction of tailings dumps the first requirement was the removal of the vegetal layer from the soil surface, a requirement that was often not observed so that the environment was affected. This paper aims to show how the environment around the Vulcan coal mine was affected in 2020..

This paper studies the noise level near the mines in the Jiu Valley using the Bruel & Kjaer Noise Dose Meter Type 4448. The purpose of the paper is to determine the noise level and how it can be reduced so that it falls within the limits imposed by law. The monitoring was done for a period of three months, during which we analyzed and compared the data with the values established by law. The results of our monitoring showed that the noise due to mining activities has a rather influential aspect in terms of occupational safety and security and does not directly affect daily life.

The studied geographical area is situated in a intramontane region situated on the Jiu River called the Jiu Valley, where the main economic activity is mining. The importance of studying this area is related to the effect of coal mining on the climate. Coal extraction in the area led to a change of atmospheric temperature due to the emissions of gases and dust that affects the environment. The use of LM75A sensors allow us to accurately read the air temperature and transmit warning messages when certain temperature intervals are exceeded.

The paper presents the measurements and observations made at the Berbeti-Alunu coal basin, where soil samples were taken from different points of the coal basin. Based on qualitative and quantitative measurements of the chemical elements in the soil and its degree of fertility, it was found to be poorly fertile and characterized by an acidic pH. However, the presence of vegetation can be observed on its surface.. [ABSTRACT FROM AUTHOR]

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Mining activities for the extraction and efficient use of mineral substances have opened the way to civilization, progress and well-being for many countries of the world, including Romania. This paper analyzes the intramontane area of the Jiu Valley. This paper is based on a public opinion poll conducted in Jiu Valley. The survey was conducted between 16.07.2020 and 16.09.2020 on a sample of 2000 persons, adults over the age of 18 years. [ABSTRACT FROM AUTHOR]

All the factors that determine the conditions necessary for human existence are related to the environment. Contamination of the environment with materials that interfere with human health, quality of life or the natural function of ecosystems represents pollution. The present paper is based on an opinion poll on the quality of the environment in the city of Petrosani because we wanted to see what the state of the environment is and how we can help maintain or improve it. [ABSTRACT FROM AUTHOR]

In the coal preparation plant situated in Vulcan, a part of raw coal extracted from the mining units in the "ValeaJiului" is being processed. The small grit coal from circulating waters is concentrated with cyclone batteries and recovered and drained with the help of special screens. The fine tailings from residual water aredirected into the slurry decanters and the water is purged using reagents. For appropriate dosing of the reagents, weekly samples of water containing tailings are collected form the slurry decanters. In the following we will analyze and interpret the indicators obtained from the processing of these samples. [ABSTRACT FROM AUTHOR]

Our goal was to developed, implementated and practical experimentated an XYZ position control system for a ABB industrial robot. The electrical motors used are induction squirrel cage motors. The position adjustment system is based on a vectorial control, sensor-less, of the mechanical speed of the induction motor. The speed estimation and components of the rotor flux is made using the Luenberger Extended Estimator. The design of the adaptation component is based on V.M. Popov hypersensitivity. In the final the position adjustment of the ABB robot is analyzed using Matlab - Simulink. [ABSTRACT FROM AUTHOR]

This software aplication shows how identifying the roads on a map over time, selection the minimum trip, creating a map and using the intuitive interface for determining the minimum trip length on map . In addition, the software may open new maps, which are separate from the source code, and create new maps. [ABSTRACT FROM AUTHOR]

This paper shows how simulation modeling and control of a support section with Petri Nets using Visual Object Net + +. During development of this software, special attention was given to use intuitive, thanks to ease of design, simulation fast and clear documentation of Petri networks. In the current version, events / terms of Petri networks planned with infinite capacity are allowed. [ABSTRACT FROM AUTHOR]

The purpose of this paper is to present a new sysntesis of the estimator Gopinath extended used in vectorial control of the position of GMF360 industrial robot. The extended Gopinath observer proposed in this paper is designated to estimate the rotor flux components and the rotor resistance of the induction motor. This work presents a new strategy to assign the Gopinath matrix elements of the flux estimator in the EGO observer. The studied control system is based on the direct rotor flux orientation method (DFOC). [ABSTRACT FROM AUTHOR]

The purpose of this paper is to present the extended KANBANS system that are utilized in the modeling and simulation of CIM systems. [ABSTRACT FROM AUTHOR]