This work presents a research of methodology in occupational stress analyse in the educational field, as a part of a larger study. The objectives of the work are in finding accents in existence of significant relations between stressors and effects, meaning the differences between the indicators of occupational stress to teaching staff in primary and gymnasium school, taking notice of each specific condition: the institution as an entity, the working community, the discipline he/she is teaching others, the geographic and administrative district (urban/rural) and the quantification of stress level.

Abstract. The paper deals with a case study for carried out in order to justify the installation of a gas cogeneration system fitted with an internal combustion engine, system used to supply electricity and heat to the users of an energy user which exceeds 1000 toe/year. 2 scenarios were therefore compared based on the energetic analysis: -the actual scenario in which energy is supplied from the National Energetic System. -the scenario in which a combined heat and power plant is used. The amount of energy saved yearly, the specific fuel consumption and the environmental impact were determined by the comparative study. The diagrams representing the variation of the performance indicators according to the operation period were also created. The usefulness of the paper consists in the creation of the yearly optimum installation operation time chart.

The paper represents the application of a multicriterial analysis for establishing the decisional priorities in the field of impacts generated by polluting emissions from large burning installations. The analytic hierarchy process (AHP) method was used in order to express quantitatively how the environmental protection and sustainable development objectives are met. Based on experimental determinations carried out on site at Mintia Power Station, Romania and the brainstorming sessions held with people appointed to take decisions in the area, the criteria required to make a hierarchy of environmental protection measures were appointed. In order to verify the accuracy and coherence of the results, a numerical analysis software, which operates with matrix calculus was used. The range of the results obtained is within the limits established by Saaty for the consistency report. The conclusions drawn are in complete accordance with the EUROPA 2020 Strategy.

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The problem the paper deals with is the determination of ground heat distribution on different distances inside a cylindrical mine work. Both interior radius and the exterior radii of the cylinder are known. The use of the range of temperatures is useful for the calculation of the heat exchange rock -air. Results dissemination allow the development of a mathematical, model which may be applied to a series of natural conditions as well as to different geometrical shapes closer or not to the form of a cylinder.