Abstract: Method of providing automated individual promotional and price information to a customer at the moment of viewing goods of interest in self-service stores. It comprises software application with identification code pre-installed on the customer's smart phone, automatic reading of machine-readable code (for example, QR code) applied on the name and price labels or stickers of commodities located at the store shelves using, e.g., smart phone photo camera. Code information is transmitted via mobile Internet to Data Processing Center and media file is sent back to a customer smart phone with personalized, in dependence on his purchasing history, content and personal discount on selected goods. Method further comprises transmission of selected commodity code and amount of discount granted from Data Processing Center to a store computer controlling check-outs.

Abstract: The method and extractor relate to dentistry and are intended for extraction of metal instruments fragments from a root canal of the tooth, as these instruments may be broken and may get stuck here, for example, during endodontic treatment. According to the invention, two insulated metal electrodes assembled as a cylinder are inserted into the root canal until electric contact with the fragment to be extracted. Then electric current impulse is ran through the circuit formed by the first electrode, metal fragment and second electrode; the intensity and duration of the electric impulse shall be sufficient for welding of the fragment to the electrodes by means of heating at the contact points; this time a heating of the surrounding tissues remains at the physiologically acceptable level; afterwards the electrodes are extracted from the root canal together with the fragment. Depending on a clinical situation, electrodes of various size and configuration are used.

Abstract: The invention relates to a method that comprises generating air flows (2) in the form of an air curtain in front of openings of the face to be protected using ambient air without preliminary purification, and directing said flows (2) in such a way that the flow lines do not intersect the planes of the openings of the face to be protected and reject aerosol particles in the vicinity of said openings. The configuration of the flows (2) is selected so that any vector extending from the surrounding medium through the air into the plane of the openings of the face to be protected, intersects at least one of said flows (2). The speed and the transverse section of the flow (2) are selected so that the acceleration gained by the aerosol particles falling into the flow from the surrounding medium, is sufficient for diverting them from the sections of the face to be protected.

Abstract: The method and extractor relate to dentistry and are intended for extraction of metal instruments fragments from a root canal of the tooth, as these instruments may be broken and may get stuck here, for example, during endodontic treatment. According to the invention, two insulated metal electrodes assembled as a cylinder are inserted into the root canal until electric contact with the fragment to be extracted. Then electric current impulse is ran through the circuit formed by the first electrode, metal fragment and second electrode; the intensity and duration of the electric impulse shall be sufficient for welding of the fragment to the electrodes by means of heating at the contact points; this time a heating of the surrounding tissues remains at the physiologically acceptable level; afterwards the electrodes are extracted from the root canal together with the fragment. Depending on a clinical situation, electrodes of various size and configuration are used.

Abstract: The method and extractor relate to dentistry and are intended for extraction of metal instruments fragments from a root canal of the tooth, as these instruments may be broken and may get stuck here, for example, during endodontic treatment. According to the invention, two insulated metal electrodes assembled as a cylinder are inserted into the root canal until electric contact with the fragment to be extracted. Then electric current impulse is ran through the circuit formed by the first electrode, metal fragment and second electrode; the intensity and duration of the electric impulse shall be sufficient for welding of the fragment to the electrodes by means of heating at the contact points; this time a heating of the surrounding tissues remains at the physiologically acceptable level; afterwards the electrodes are extracted from the root canal together with the fragment. Depending on a clinical situation, electrodes of various size and configuration are used.

Abstract: Chemical analysis of impurities in buffer gas is provided at various pressures up to atmospheric. Identification of the impurities is carried out by analyzing energy of electrons releases via ionization of the impurity atoms or molecules in their collisions either with excited atoms of buffer gas or with monochromatic photons. To produce excited metastable atoms a pulsed plasma is ignited between plane anode and cathode, and electrons energy is measured in afterglow by determining second derivative of electric current in dependence of voltage applied between these electrodes. Another way, electrons energy can be analyzed by positioning a grid between anode and cathode and by using an external radiation source to ionize the impurities in equipotential space between the grid and the anode. Inter-electrode gap and gas pressure must be chosen so that distortions in the electrons energy distribution due to collisions with buffer gas should not exceed a prescribed value.