Abstract: The present invention relates to a method of producing a polypeptide having ?-hexosaminidase activity, comprising the steps of a) providing a yeast cell comprising a polynucleotide encoding a polypeptide having ?-hexosaminidase activity and having an amino acid sequence being at least 95% identical to the amino acid sequence shown in SEQ ID NO: 1, b) cultivating said yeast cell under conditions which allow for the production of the polypeptide, and c) obtaining the polypeptide produced in step b). The present invention further concerns a polynucleotide encoding a polypeptide having ?-hexosaminidase activity and having an amino acid sequence being at least 95% identical to the amino acid sequence shown in SEQ ID NO: 1, as well as polypeptide encoded by said polynucleotide. Moreover, the present invention concerns a yeast cell comprising the polynucleotide of the present invention.

Abstract: A pre-tensioned bearing assembly, including: a first rolling bearing including a first outer ring, first inner ring including a first cylindrical surface, and a plurality of rolling elements radially disposed between the first inner and outer rings; a second rolling bearing including a second outer ring, a second inner ring including a second cylindrical surface, and a plurality of rolling elements radially disposed between the second inner and outer rings; a shaft including a shoulder in contact with the second rolling bearing; a first conically-shaped sleeve in contact with the first cylindrical surface and the second cylindrical surface, and including a conical inner surface; a second conically-shaped sleeve in contact with the conical inner surface; and a shaft nut including an internal thread in cooperation with the shaft, and fixing the first inner ring and the second inner ring axially onto the shaft.

Abstract: A pre-tensioned bearing assembly, including: a first rolling bearing including a first outer ring, first inner ring including a first conical surface, and a plurality of rolling elements radially disposed between the first inner and outer rings; a second rolling bearing including a second outer ring, a second inner ring including a second conical surface, and a plurality of rolling elements radially disposed between the second inner and outer rings; a shaft including a shoulder in contact with the second rolling bearing; a first conically-shaped sleeve in contact with the first conical surface and the second conical surface, and including a cylindrical inner surface; a second conically-shaped sleeve in contact with the cylindrical inner surface; and a shaft nut including an internal thread in cooperation with the shaft, and fixing the first inner ring and the second inner ring axially onto the shaft.

Abstract: A method for acoustically sensing an area is described. An acoustic transmit pulse is transmitted into the area by an acoustic transducer and a received signal is acquired with the aid of the transducer, in order to receive the transmit pulse reflected back from the area. Within a post-pulse oscillation time of the transducer, which directly follows the emission of the transmit pulse, the actual phase response of the received signal is determined. In the event the actual phase response deviates from a predefined setpoint phase response, an object is detected within the area. Also described is a device for acoustically sensing an area, which is designed to carry out the method.

Abstract: A rotary connection for cranes, wind power plants, solar panels and the like, having an outer ring (1) and having an inner ring (2) which are arranged so as to be rotatable relative to one another, and also having a rotary drive (5). An inexpensive rotary drive, which takes up little installation space, for the rotary connection is attained according to the invention in that the rotary drive (5) is arranged within the inner ring (2) and acts on the inner ring (2) via a wraparound element (7; 17, 18). Without departing from this design principle, it may also be provided that the rotary drive is arranged within the outer ring (1) and acts on the outer ring (1), which is to be rotated, via a wraparound element. The wraparound element may be a flexible tensile element (7), for example a cable, a flat belt or a chain, or else may be a thrust element (17) which is flexurally rigid in a transverse direction, for example a thrust belt, a thrust chain or a thrust link belt.

Abstract: A method for acoustically sensing an area is described. An acoustic transmit pulse is transmitted into the area by an acoustic transducer and a received signal is acquired with the aid of the transducer, in order to receive the transmit pulse reflected back from the area. Within a post-pulse oscillation time of the transducer, which directly follows the emission of the transmit pulse, the actual phase response of the received signal is determined. In the event the actual phase response deviates from a predefined setpoint phase response, an object is detected within the area. Also described is a device for acoustically sensing an area, which is designed to carry out the method.

Abstract: A circuit arrangement and a method for the DC-isolated driving of a semiconductor switch, wherein the circuit arrangement has a control circuit, a driver, a transformer for the DC-isolated transfer of a drive signal from the controller as switching signal into the driver and means for rectifying the switching signal, wherein the driver contains the semiconductor switch having a gate, a source and a drain, wherein the semiconductor switch can be switched by a predetermined first voltage between the gate and the source with the result that a predetermined current flows between the drain and the source, wherein the switching signal can be applied to the gate in order to switch the semiconductor switch, wherein the driver contains a control transistor having a base, an emitter and a collector, wherein the control transistor can be switched by a predetermined second voltage between the base and the emitter, with the result that the gate of the semiconductor switch can be connected to the source of the semiconducto

Abstract: A circuit arrangement (100) and a method for the DC-isolated driving of a semiconductor switch (400) are presented, wherein the circuit arrangement has a control circuit (101), a driver circuit (102), a transformer (200) for the DC-isolated transfer of a drive signal from the control circuit (101) as switching signal into the driver circuit (102) and means for rectifying (301, 302) the switching signal, wherein the driver circuit (102) contains the semiconductor switch (400) having a gate electrode (401), a source electrode (402) and a drain electrode (403), wherein the semiconductor switch (400) can be switched by a predetermined first voltage between the gate electrode (401) and the source electrode (402), with the result that a predetermined current flows between the drain electrode (403) and the source electrode (402), wherein the switching signal can be applied to the gate electrode (401) in order to switch the semiconductor switch (400), wherein the driver circuit (102) contains a control transistor (32

Abstract: A method of controlling a drive of a vehicle during both acceleration phase and constant ground speed phase of operation is disclosed. The drive includes an engine (1) controlled by an electronic control unit (6), the engine driving an infinitely variable change-speed gear (2). The method includes setting a desired ground speed of the vehicle and repeating a cycle of steps a), b) and c) in both phases of operation. These steps are as follows: a) determining any change in the torque % level (actual torque/maximum torque) of the engine. b) calculating a theoretical engine speed in response to the change in torque % level and the actual speed of the engine caused by the change in torque % level, said theoretical engine speed being determined with the aid of a speed dependant performance parameter characteristic of the engine (e.g.

Abstract: In an arrangement composed of a substrate and a heat sink, the substrate is provided on a first side with at least one power component arranged on a first large-surface printed circuit trace and, on a second side opposite the power component, with a second large-surface printed circuit trace, which is connected in a thermally conductive manner to the first printed circuit trace via via holes. The substrate is mounted at the second side onto the heat sink in a thermally conductive manner, in order to achieve a good heat coupling of the substrate to the heat sink and the same time to avoid an undesirable electrical contact between the potential-carrying printed circuit traces and the heat sink. The substrate having spacer elements arranged on the second side is placed onto the heat sink and to hold it at a defined distance from the heat sink, the gap formed by the distance between the substrate and the heat sink being filled with a thermally conductive filler.

Abstract: The invention concerns a high pressure discharge bulb. Such bulbs involve a wo-sided sealed bulb with and without an outer bulb. The bulb is sealed by a pinch on at least one side. It generally has a discharge vessel made of quartz. These bulbs particularly comprise metal halide bulbs, which have a metal halide filling in addition to mercury, but they also include mercury high pressure discharge bulbs or xenon high pressure discharge bulbs. The bulbs are used preferably for optical systems, particularly larly for photo-optical purposes, for example, in head-lights, overhead projectors, and decorative lighting devices. They particularly find application in lighting systems for the stage, film and television. Typical lamp powers are 400 to 2000 W. A discharge lamp pinched on each end has pinches in which the ratio of the total width of each wide side is smaller than or equal to 2.2 times the thickness of the wide side. Tube pieces carrying the base sleeves are formed on the outer ends of the pinches.

Abstract: A metal-halide discharge lamp for photooptical purposes has a small electe spacing of less than 15 mm, preferably 2-8 mm, to provide an essentially pin-point light source, and a fill which contains AlI.sub.3 in an amount between 0.1 and 4.5 mg/cm.sup.3. Other filling components may in particular be halides of mercury, indium, thallium or cesium; up to 2 mg/cm.sup.3 of AlBr may be added. The lamp is particularly adapted for combination with a, preferably parabolic, reflector.

Abstract: A metal halide gas discharge lamp for projection purposes includes a discge vessel closed at both ends preferably has between the electrodes a central frosted partial area applied on the outer surface of the discharge vessel. The relationship 0.1<B.ltoreq.1, preferably 0.4<B/d<0.8, applies to the quotients of the width B of the frosted partial area by the inter-electrode gap d. The lamp is optionally provided on one or both sides with heat build-up coatings. The lamp advantageously forms a unit with an optical reflector.