Formation of quasi-periodic nano- and microstructures on silicon surface under IR and UV femtosecond laser pulses

Quasi-periodic nano- and microstructures have been formed on silicon surface using IR ( λ ≈ 744 nm) and UV ( λ ≈ 248 nm) femtosecond laser pulses. The influence of the incident laser fluence and the number of pulses on the structured surface topology has been investigatedyesBelgorod State Universit

Development of engineering solutions for air drilling at Dulisminsk oilfield, Irkutsk oblast

The article presents the analysis of disastrous mud loss achieved during casing at Dulisminsk oil and gas condensate field (DOGCF) and comparative evaluation of geological structure of DOGCF and Naryksko-Ostashkinsk area of Kemerovo oblast, where the same problem was solved successfully. On the basis of the analysis, an engineering solution is proposed to prevent mud loss in the conditions of DOGCF

Health risk assessment from ionizing radiation exposure to a non-destructive testing (NDT) inspector

The article considers health risk assessment from exposure to ionizing radiation for NDT specialists who perform non-destructive testing of gas pipelines.В данной статье рассматриваются вопросы оценки риска здоровью работников профессии «дефектоскопист» от воздействия ионизирующего излучения, осуществляющих проведение неразрушающего контроля газопроводо