Infrared dynamical thermovision of the biological objects

Dynamical infrared thermovision and applications for real time functional diagnostic of biological objects are reviewed. Experiments with humans and animals are described. It is shown that method is very promising for blood flow studies and brain research.     

Lease contract in a consumer goods shop

Dneprodzerzhinsk Industrial Institute. Dnepropetrovsk Metallurgical Plant. Translated from Metallurg, No. 6, pp. 21–23, June, 1990.     

Tests of a P-67 boiler for an 800 MW unit

The rebuilding of the P-67 boiler for an 800 MW unit at the Berezovskaya GRéS, as well as changes in the thermal engineering characteristics of the coal from the Berezovskii-1 seam and its slagging properties, are described. The results of balance tests of the boiler and changes in the thermal efficiency of heating surfaces during 2006 – 2008, including after mechanical cleaning and modernization of the combined cleaning system, as well as with coal dust coarsening and loading of the lower burner layers and downward blast, are discussed.     

Extending the life of free-wheel ratchet mechanisms by backup of the working components

A method is proposed for extending the life of free-wheel ratchet mechanisms by backup of the pawls. Comparative assessments are presented.     

Operational and safety analyses of a commercial PEMFC system

A commercial, transportable proton-exchange-membrane fuel-cell (PEMFC) system rated at 7 kW nominal power was the subject of an operational (reliability, availability, and maintainability) and process-safety analysis. The scope of the analysis included the system start-up to engine-run mode, the maintenance tasks, as well as the continuous power-production mode, carried out with a hazard and operability (HAZOP) study and a failure-scenarios' development. The failure and process-safety risks were categorized and the probabilities were assessed with a fault-tree analysis (FTA) using equipment-failure-rate data from the literature, if available. The results led to similar conclusions to those previously reported in similar studies, and the most important equipment/devices with respect to reliability and safety aspects were identified. While the most important uncertainty in the complete analysis comes from the generic equipment failure-rate data used, about three failures in the first year of operation are estimated together with an availability of about 98% (a point value figures, confidence interval analysis was also made). The process-safety analysis revealed four potential accident scenarios involving hydrogen releases, fires and explosions. Finally, detailed suggestions and recommendations for changes/improvements with respect to the reliability/availability, maintainability and safety aspects of the system analysed are presented.