Abstract: The invention relates to a receiver for production of electricity and heat in solar energy systems comprising focussing optical components wherein, the receiver has at least one surface covered with solar cells for production of electricity and at least one optically selective surface, wherein a greater portion of the surface of the receiver exposed to concentrated sunlight is covered with solar cells, while a greater portion of the surface of the receiver exposed to direct sunlight is covered with an optically selective surface.

Abstract: A system and method for detection of a brainstem disorder, such as schizophrenia, by means of brainstem audiometry is disclosed. A subject's (4) responses on the physical properties of sound; frequency, time and amplitude are being detected. Sound stimuli are being presented, via a communication element (2) through a hearing organ (3) to the subject. Elements (7) are attached to the subject (7) for measurement of the subject's electrophysiological brain activity. Simultaneously as the mentioned sound stimuli (1) are presented to the subject (4) a trig signal is sent out from the organ for generation of stimuli (1), via a trig box (5), further to an organ for registration (6) of the electro-physiological brain activity in the subject (4), whereafter mentioned electrophysiological brain activity is stored and imaged, in computer equipment (8) for determination of a brainstem disorder in the subject.

Abstract: A system and method for detection of a brainstem disorder, such as schizophrenia, using brainstem audiometry, is disclosed. A subject's (4) responses on the physical properties of sound, such as frequency, time and amplitude, are being detected. Sound stimuli are being presented, via a communication element (2) through a hearing organ (3) to the subject. Elements (7) are attached to the subject (4) for measurement of the subject's electrophysiological brain activity. Simultaneously as the mentioned sound stimuli (1) are presented to the subject (4) a trig signal is sent out from the organ for generation of stimuli (1), via a trig box (5), further to an organ for registration (6) of the electrophysiological brain activity in the subject (4), whereafter the electrophysiological brain activity is stored and imaged in computer equipment (8) for determination of a brainstem disorder in the subject.

Abstract: The invention relates to a receiver for production of electricity and heat in solar energy systems comprising focussing optical components wherein, the receiver has at least one surface covered with solar cells for production of electricity and at least one optically selective surface, wherein a greater portion of the surface of the receiver exposed to concentrated sunlight is covered with solar cells, while a greater portion of the surface of the receiver exposed to direct sunlight is covered with an optically selective surface.

Abstract: A system and method for detection of a brainstem disorder, such as schizophrenia, by means of brainstem audiometry is disclosed. A subject's (4) responses on the physical properties of sound; frequency, time and amplitude are being detected. Sound stimuli are being presented, via a communication element (2) through a hearing organ (3) to the subject. Elements (7) are attached to the subject (7) for measurement of the subject's electrophysiological brain activity. Simultaneously as the mentioned sound stimuli (1) are presented to the subject (4) a trig signal is sent out from the organ for generation of stimuli (1), via a trig box (5), further to an organ for registration (6) of the electro-physiological brain activity in the subject (4), whereafter mentioned electrophysiological brain activity is stored and imaged, in computer equipment (8) for determination of a brainstem disorder in the subject.

Abstract: The invention relates to a device for opening of doors. Electromechanical systems contain many expensive components and are thereby expensive to manufacture. Installed electromechanical systems are expensive in operation by virtue of the high and energy-demanding friction which always are present in mechanical constructions. The present operating device is less energy-demanding by the formed transmission of power via two piston-like parts (5 and 6). A driving device (2) is arranged to drive the piston-like part (5) and the second piston-like part (6) is connected to an operable element.

Abstract: A plate evaporator comprises several heat exchange plates arranged substantially vertically in spaced face-to-face relationship to define between the plates evaporation passages alternating with heating medium passages. An increasing cross-sectional area and a decreasing perimeter of the evaporation passages are achieved by so arranging the two heat transfer surfaces of adjacent plates defining an evaporation passage that they diverge from each other in the flow direction of the medium to be evaporated and by decreasing the width of said heat transfer surfaces in said direction.

Abstract: A plate evaporator of the rising film type and/or the falling film type comprises several heat exchange plates essentially vertically arranged in spaced face-to-face relationship to define evaporation passages alternating with heating medium passages. Evaporation passages with increasing cross-sectioned area and decreasing perimeter in the flow direction of the feed liquid are formed by providing adjacent plates encompassing one evaporation passage with bulges (for example, ridges) which bulges, compared with imaginary planar plates, entail reduced volume of the evaporation passages. The size of said bulges (that is, the volume-reducing effect of said bulges) is gradually reduced in the flow direction of the medium to be evaporated. Thus, the cross-sectional area of the evaporation passages is increased while their perimeter is reduced in said direction.