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The dynamics of a transient plasma generated by laser ablation on a Mg target was investigated by means of the Langmuir probe method and fractal analysis. The empirical data showcased the presence of an oscillatory behavior at short expansion times (<1 μs) characterized by two oscillation frequencies and a classical behavior for longer evolution times. Space- and time-resolved analysis was implemented in order to determine main plasma parameters like the electron temperature, plasma potential, or charged particle density. In the motion fractal paradigm, a theoretical model was built for the description of laser-produced plasma dynamics expressed through fractal-type equations. The calibration of such dynamics was performed through a fractal-type tunneling effect for physical systems with spontaneous symmetry breaking. This allows both the self-structuring of laser-produced plasma in two structures based on its separation on different oscillation modes and the determination of some characteristics involved in the self-structuring process. The mutual conditionings between the two structures are given as joint invariant functions on the action of two isomorph groups of SL(2R) type through the Stoler-type transformation, explicitly given through amplitude self-modulation.

Nowadays, when the problem of environmental protection is quite stringent, the producers are concerned to bring on the market products, which have reduced environmental impact. In their turn, the consumers have become more aware and selective in purchasing products or services. Due to the financial crisis, consumers buy less but they are asking for quality and environmental friendly products. Under these circumstances the producers must find solutions in order to satisfy the consumers' requirements. According to market survey the significant progress has been made in the production of green products so that they reduce the environmental impact, taking into account a part or the whole lifecycle of the product. In free consecutive years gradually the companies are oriented to obtain various certifications for the products and services they offer. One of the most important and successful certification schemes identified by survey is the European eco-label. However, there are a number of other widely accepted and successful labels that are also analyzed in the present study. The survey objective was to identify green products on the Romanian market and to monitor their evolution. The present paper presents the results of three years market research focusing on product categories that include eco-labeled products.

The most important aspect of the national environmental policy concerns air pollutant emission decrease. The studies led in order to identify the atmospheric pollution sources have revealed that the energy sector is one of the biggest pollutants in the economy. Given the negative impact of the pollutant emissions on the environment and the possibility of closing the large combustion plants in case necessary measures to comply with the legal regulations in the field are not taken will significantly reduce the amount of air pollutants from these installations. This paper presents a case study regarding the monitoring of emissions from the large combustion plants on the platform of S.C. CET S.A. in Bacau.

Water classification based on mineral content is useful to determine the curative properties of each type. The water type is determined accordingly the parameter followed, like as: physical, chemical, microbiological, pharmacological, physiological and clinic. This paper presents a study of the main types of mineral waters based on specific criteria of classification applied to the mineral water springs found in the treatment resort, Slanic-Moldova. The concept of Stuyfzand�s water classification was applied to build an Android application � named Watershed, using a block-based encryption program, MIT App Inventor. This program classifies the mineral water source by chemical composition and its location on the map using the Google Maps mapping system. By synchronization with the Google Maps online service, a map of mineral water springs at source as well as a capture can be created.

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This paper presents a study on assessment of water quality. According to a study, mining activities have a significant impact on water quality (lakes, surface water and groundwater), which has become a major problem globally. Due to mining and exploitation processes, lakes can be formed around these mines. Also, these lakes have been formed around the world and are steadily increasing. The purpose of this study is to watch the quality of water from the area around mining activities. This study refers to the, Groapa Burlacu lake around the mining exploitation Targu Ocna, Romania. This lake was formed on the northern bottle of the massive salt, strongly affected by the underground activities. Sampling for the determination the concentrations of Cl- and NaCl from the studied area was made at different depths (0 m, -5 m, -10 m, -15 m, -20 m, -25 m, -30 m, -35 m -40 m). Besides these concentrations, physical parameters of the water (pH, turbidity, electrical conductivity, dissolved oxygen and temperature) were also measured. To determine the physical parameters in the monitored area, sampling was done from four different points of the area and then put together for analysis. These parameters were measured on site using portable equipment. The data on the analyzed concentrations indicate that at depths of less than 5.0 m, the NaCl concentration values are more than 250 g/L.

This paper presents a three-dimensional mathematical model which characterizes the variation of sound pressure level propagation and the variation of attenuation of the sound pressure level propagated in an enclosed space. The variable taken into consideration both in the experiments and in the mathematical modeling were: the positions of the acoustic screen to noise source; the height of the microphone to record the sound pressure level for a variable number of walls. The mathematical model is based on the experimental data obtained in laboratory, using an experimental setup, which comprises a variable number of walls as acoustic screen.