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The paper presents a modeling of the acoustic field emitted by a rig tender located offshore exploration in the Black Sea. Are presented measuring system, experimental context, the types of noise that participate in the overall noise budget and the conditions in which measurements were made, also are mentioned and the project established through were measured the parameters and were defined devices which these measurements were made. Measurement system used is adaptable, allowing dynamic measurements and operative analysis of the acquired data. Measurement methodology was determined by an acoustic project, which was set to be purchased both: sizes and ways of interpreting them. Modeling acoustic field shows that the maximum acoustic impact area, below 120 dB re 1μPa criterion (proposed and accepted by Marine Directive) was extended to 3-5Km distance around the ship. It is expected to produce adverse effects on the marine habitat and on the underwater life.

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This article presents the way to determine the cleaning degree of the parts made of microelectronic parts. The cleaning degree of parts depends on: temperature of the cleaning medium, the cleaning liquid nature, cleaning liquid viscosity, time of cleaning. Primarily the choice of the cleaning mediums depends on the type of contaminant that needs to be removed from the cleansed object, respectively on the chemical that can attack these contaminants. The cleaning degree can be determined using two parallel methods, respectively: the method of mass loss and the method of microscopy. The method of weighting justifies the cleaning by mass loss, while the method of microscopy allows clear visualization and removal of any contaminants