Abstract: Process in conjunction with the production of oxygen (22), wherein incoming air (10, 16, 16a, 16b,) is brought to pass through a sorbent/zeolite structure (18), which comprises at least three zeolite units (50a–f) intermittently operated in a first stage comprising adsorption of nitrogen from the air and a second stage comprising desorption (20, 20a, 20b) of thus adsorbed nitrogen. At least two of the zeolite units are operated in the adsorption stage, the incoming air being brought to pass consecutively (53a) through the at least two zeolite units to form an increasing nitrogen gradient; and/or at least two units of the zeolite units are operated in the desorption stage, a pressure being released and/or a desorbing gas (22a, 22b) being brought to pass consecutively (53b) through the at least two zeolite units to form a decreasing nitrogen gradient in the zeolite units.

Abstract: A moisture absorption apparatus comprises a desiccant container with a side wall and optionally a bottom and a desiccant solution container with a side wall and a bottom. The desiccant container receives particulate desiccant which forms a desiccant solution on contact with moist air. The desiccant container side wall has at least one air access opening and a passage permitting desiccant solution to flow into the desiccant solution container. The desiccant solution container has a top opening and is slidingly displaceable on the desiccant container so as to allow the desiccant container to be displaced in the desiccant solution container to a depth sufficient for the desiccant solution container side wall to fully cover the air access opening of the desiccant container.

Abstract: Process in connection with the production of oxygen (22), wherein incoming air (10, 16, 16a, 16b) is brought to pass through a sorbent/zeolite structure (18), which comprises at least three zeolite units (50a-f) intermittently operated in first stage comprising adsorption of nitrogen from the air and a second stage comprising desorption (20, 20a, 20b) of thus adsorbed nitrogen. At least two of said zeolite units are operated in said adsorption stage, said incoming air being brought to pass consecutively (53a) through said at least two zeolite units to form an increasing nitrogen gradient; and/or at least two of said zeolite units are operated in said desorption stage, a pressure being released and/or a desorbing gas (22a, 22b) being brought to pass consecutively (53b) through said at least two zeolite units to form a decreasing nitrogen gradient in the zeolite units.

Abstract: A moisture absorption apparatus for transport containers comprises a desiccant container with a side wall, optionally a bottom and means to retain the desiccant in the container. It comprises furthermore a desiccant solution container with a side wall with a side wall and a bottom. The desiccant container is capable of receiving desiccant which forms a desiccant solution on contact with moist air. The desiccant container side wall has at least one air access opening and a passage permitting desiccant solution to flow into the desiccant solution container. The desiccant solution container has a top opening and is slidingly displaceable on the desiccant container so as to allow the desiccant container to be displaced in the desiccant solution container to a depth sufficient for the desiccant solution container side wall to fully cover the air access opening of the desiccant container. The apparatus further comprises means to prevent separation of the desiccant container and the desiccant solution container.

Abstract: The present invention relates to a method for co-ordination of uplink scrambling codes between different radio network controllers (21) and the assignment of such codes to radio connections (27) of user equipments (26) in a code division multiple access (CDMA) communication system. The invention also relates to methods for creating a starting vector used to generate said scrambling codes. According to the invention, a unique subset of scrambling codes is dedicated to each radio network controller (21) by assigning an offset vector (212). Initial starting vectors (215) are composed by concatenating the offset vector (212) and the binary representation of a determining value (216) within the size range of the dedicated code subset. An idle starting vector is selected, e.g., by using a one-dimensional array (217) containing a status bit for each scrambling code and by using the array index (213) as determining value (216).

Abstract: A device for compensation of the reactive power consumption of an industrial load, preferably an electric arc furnace or a plant for rolling of metallic materials, supplied from a three-phase (a, b, c) electric ac network, comprises a first compensation device for controllable consumption of reactive power and a second compensation device for generation of reactive power. The first compensation device comprises an inductor connected in series with a semiconductor connection controllable in dependence on a control order (.alpha.ref) supplied thereto. Control equipment is supplied with measured values of voltage (Ua, Ub, Uc) and current (Ia, Ib, Ic), respectively, at the load. The control equipment comprises devices for determination of the instantaneous consumption of active and reactive power by the load, and a control device which forms the control signal to the first compensation device in dependence on the consumption of reactive power and active power by the load.

Abstract: Implant intended to be fixed through contact with new grown bone tissue comprising a dense material having an implant surface, and having, at least within a surface portion of the implant surface, surface pores covering at least 5% of the surface portion. The surface pores constitute a contact surface for new grown bone tissue, wherein close to at least a substantial fraction of all of the surface pores has at least one elevation extending over the implant surface which completely or at least partially surrounds an edge of the pore. Each elevation has a rough surface which causes formation of soft tissue when the implant surface is in contact with newly growing bone tissue.

Abstract: A method and system for controlling combustion engines by detection of the present air/fuel ratio within the cylinders of the combustion engine, using an analysis of the characteristics of the ionization current, as detected via a measuring gap with a bias voltage applied being arranged in the combustion chamber, preferably using the spark plug gap in an Otto-engine. A measuring voltage corresponding to the degree of ionization is detected during the flame ionization phase and during a time- or crankshaft position dependent period A, B, C or D, which duration is dependent of the present air/fuel ratio, and will be finished by an amplitude maximum PF during the flame ionization phase. A parameter characteristic for the fundamental frequency of the measuring voltage during the period A, B, C or D is detected, which parameter indicates a tendency towards the rich direction of stoichiometric when the fundamental frequency increases, and inversely indicates lean tendency when the fundamental frequency decreases.

Abstract: The invention relates to a method for the surface treatment of a metallic material, the coating being designed for creating an artificial patina in a copper-bearing material after the material is installed in its final location of use. According to the invention, in connection with the filtering and washing stage, including at least one step, of the precipitate formed of the ingredient components of the coating material, the solids content of the precipitate is adjusted within the range of 15-50% by weight, as calculated from the weight of the coating material after the filtering stage, and the coating material with an adjusted solids content is stored at a temperature lower than 5.degree. C. prior to applying said coating material onto the target surface.

Abstract: A method and system for authenticating the identification of mobile stations during system access is disclosed. A modified electronic serial number, including an encoded COUNT value, sent by the mobile station is compared with a modified electronic serial number corresponding to that mobile station stored in system memory. In this way, fraudulent use can be deterred and detected without changing the specification of information to be transmitted over the air interface in existing radiocommunication systems.

Abstract: The present invention relates to an implant made of a porous non-toxic material having a total open porosity exceeding 5% by volume but not exceeding 80% by volume within at least one portion of the implant, which is characterized in that: communicating micropores, having a size of less than or equal to 10 .mu.m, make up not more than 10% of the total pore volume in said at least one portion of the implant; and at least 5% of at least one section of the surface on the implant is covered by substantially evenly distributed pores having a pore size exceeding 50 .mu.m.

Abstract: A method of joining tubes (A and B) having a corrugated wall (10) of fusible plastic material and terminating at a cut through a corrugation rib, comprises the following steps. An annular body (14) expanding when energy is supplied to it, is positioned in an annular space (13) formed by the corrugation ribs at the end of one tube (A) and an inner boundary which can be formed by an inner wall (11) of fusible plastic material, integral with the corrugated wall of said one tube, or by a sleeve inserted into the adjacent ends of the tubes, also of fusible material. The tube ends are put together to close said space by the end of the other tube (13), and a radial and axial support (19) for the corrugation ribs is arranged on the outside of the tubes. Then, the annular body is expanded by heating to fuse said body to the walls of the tubes and the sleeve, respectively.

Abstract: A process for the production of silicon nitride by reaction of silicon dioxide, carbon and nitrogen at temperatures above about 1300.degree. C. whereby a partial pressure of nitrogen above 1 bar is maintained during the reaction.

Abstract: A process for the production of silicon or ferrosilicon by reduction of silicon oxide, optionally in the presence of iron or iron oxide, using a carbonaceous reducing agent, in a reduction furnace.

Abstract: A process for the production of silicon or ferrosilicon by reduction of silicon oxide, optionally in the presence of iron oxide, by means of a carbonaceous reducing agent in a reduction furnace. The furnace operation is simplified and the yield is increased by making the supply of energy and the supply of silicon oxide, respectively, independent of each other and by adjusting the ratio between them in such a manner that the gases leaving the furnace have a silicon monoxide content below 10 mole percent. A controlled supply of at least a part of the silicon oxide to the hotter parts of the furnace can be used as a means of making the supply of energy and the supply of silicon oxide reciprocally adjustable.