The dynamics of carbon oxide evacuation from closed enclosures

The carrying out of human activities of an industrial nature involves the use, handling or accidental presence of substances of a toxic nature such as carbon oxide. The presence of this gas in closed or semi-closed spaces can seriously affect the human body and when concentrations are high it can lead to death. Knowing how carbon oxide affects the human body and how it disperses into the air is very important for establishing preventive measures. Also, in order to establish the escape routes and the refuge areas, it is necessary to know the dispersion dynamics of carbon oxide both horizontally and vertically. The paper presents the experiment on establishing the dynamics dilution and evacuation of carbon monoxide in a closed enclosure

Управління комплексною вентиляційною мережею соляної шахти Trotus

The attestation of salt extraction in these areas was located in the Geto-Dacian period at Oituz and Târgu Ocna. The oldest written testimony dates from 1380. The mining works that serve the Trotuş mine within the Tg. Ocna Salt Mine, are located in the Feţele Târgului salt massif located near the town of Tg. Ocna, on the left side of the Trotuş river. The exploitation of the salt was carried out until 1870 at the Ocnița Mine with a bell-shaped chamber and continued in the Moldova Veche and Moldova Nouă mines with trapezoidal chambers. Since 1967, the salt has been exploited with "small rooms and abandoned square pillars". The exploitation is carried out descending, on the horizons. Currently, the Trotuș Salt Mine has 14 horizons: 2 at the Pilot mine and 12 at the Trotuș mine. The specialized 3D CANVENT program was used to establish the optimal distribution of air flows. A number of 492 junctions and 697 branches were used to solve the ventilation network related to the Trotuș Salt Mine.Атестація видобутку солі в цих районах проходила в гето-дакійський період в Ойтузі та Тиргу-Очна. Найдавніші письмові свідчення датуються 1380 роком. Гірничі роботи, що обслуговують шахту Тротуш у межах Тг. Соляна шахта Окна, розташована в соляному масиві Фецеле-Тиргулуй, що знаходиться недалеко від міста Тг. Очна, з лівого боку річки Тротуш. Експлуатація солі велася до 1870 р. На шахті Окниця з дзвоноподібною камерою і продовжувалась у шахтах Молдова Вече та Молдова Ноуа з трапецієподібними камерами. З 1967 р. Сіль експлуатується в "маленьких кімнатах і занедбаних квадратних стовпах". Експлуатація здійснюється низхідно, по горизонтах. В даний час соляна шахта Тротуш має 14 горизонтів: 2 на пілотній шахті та 12 на шахті Тротуш. Для встановлення оптимального розподілу повітряних потоків була використана спеціалізована програма 3D CANVENT. Для вирішення вентиляційної мережі, що стосується соляної шахти Тротуш, було використано 492 перехрестя та 697 гілок

Are tax rates still decisive in FDI investment Choice or what drives sectoral FDI nowadays?

We explore the effects of effective taxation and institutional quality on sectoral FDI. Our analysis comprises European countries and we use data from 2002 to 2020. We employ a GMM approach and show that a rise in both apparent taxation and tax differential reduces sectoral FDI flow while soaring tax differential increase FDI stock. Among the institutional variables, tertiary enrollment attract FDI and secondary attainment has opposite results depending on the sectoral FDI. Our findings indicate that government should lower taxation for more FDI flows and strengthen tertiary and secondary enrollment

Are tax rates still decisive in FDI investment Choice or what drives sectoral FDI nowadays?

We explore the effects of effective taxation and institutional quality on sectoral FDI. Our analysis comprises European countries and we use data from 2002 to 2020. We employ a GMM approach and show that a rise in both apparent taxation and tax differential reduces sectoral FDI flow while soaring tax differential increase FDI stock. Among the institutional variables, tertiary enrollment attract FDI and secondary attainment has opposite results depending on the sectoral FDI. Our findings indicate that government should lower taxation for more FDI flows and strengthen tertiary and secondary enrollment

Classification of underground mining works within the Tg. Ocna salt mine from the point of view of gas emissions

According to the new classification method, salt mines and underground work or areas where methane has not been observed but for which methane has been observed in boreholes found in rock massifs are considered to be fire mines / mine areas or mining work. This new classification allows only the effective areas of exploitation to be maintained in the wire regime, the rest of the salt mine being considered non-wire. The purpose of this paper is to determine the rate of methane (explosive gas) and carbon dioxide (oxidizing gas) in the mining operations of the Tg-Ocna salt mine, given its classification

How Can Culture Affect Taxation? A Postmaterialism Value Approach

International audienc

So alike, yet so different: Comparing fiscal multipliers across EU members and candidates

International audienc

Environmental impact of methane released from coal mines

Methane gas accompanying coal deposits was formed as a result of successive stages of the anaerobic process of vegetal material transformation into coal, at high temperatures and pressures, without external oxygen supply. During the metamorphism process, the content of C, H and O is modified, meaning an increase in carbon content, a decrease in hydrogen and oxygen, the nitrogen and sulphur content remaining constant. During this process, water and carbon dioxide is generated, the water being generated in the first transformation phases. Within the slow oxidation process, gas products result by using the oxygen content in plants, especially methane and carbon dioxide due to the fermentation stimulated by bacteria. Methane released into the atmosphere following the mining of coal have double ecological impact, participating in the destruction of the ozone layer and at the same time contributing to the enhancement of the greenhouse effect. At the same time, methane gas released into the atmosphere during coal mining may be used by mining operators as primary power resource for covering the power requirements of the mine or it can be used for commercial purposes