Abstract: A gas diffusion electrode made of carbon, a process for producing an electrode and a carbonizable composite are provided. Thin, flat, porous gas diffusion electrodes made of carbon, which have a smooth surface and in which the porosity can be regulated at will, are obtained by pyrolysis of a composite of an organic polymer having a spatial globular structure (SGS polymer) and a reinforcing skeleton formed at least in part of organic material.

Abstract: In a random access memory, a sequence of selection signals for a combined multi-memory operating functionality is supplied on control lines which connect the control logic to each memory cell in a cell field when the memory is in a combined multi-memory operating mode, and a sequence of selection signals for the write enable functionality is supplied when the memory is in the single-memory operating mode.

Abstract: A method of operating a combustion plant having a number of burners includes controlling a composition of a fuel mixture of each burner with at least one setpoint that is determined with reference to dynamic characteristic quantities characterizing a combustion process, and determining the at least one setpoint in dependence on a contribution of each individual burner to a total proportion of a reaction product produced in the combustion process. The contribution of each burner to the total proportion of the reaction product is determined for each burner with reference to the dynamic characteristic quantities and static characteristic quantities characterizing a combustion plant. The method homogenizes the combustion process. The invention also includes an apparatus applying the method, including burners respectively controlled with the setpoint for a composition of a fuel mixture. A setpoint module determines the setpoint for each individual burner of the burners.

Abstract: A memory cell contains a memory transistor and a transfer transistor. A gate electrode of the transfer transistor and a control gate electrode of the memory transistor are connected to a word line. The memory transistor has a floating gate electrode that is isolated from a channel region of the memory transistor by a first dielectric layer and is connected to a first source/drain region of the transfer transistor. The control gate electrode is isolated from the floating gate electrode by a second dielectric layer. A first source/drain region of the memory transistor is connected to a bit line. The memory and transfer transistors are preferably of different conductivity types. During the writing of information, the transfer transistor is in the on-state and the memory transistor is in the off-state. During the reading-out of information, the transfer transistor is in the off-state and the memory transistor is in the on-state.

Abstract: A gas-filled surge arrester includes at least two electrodes, a hydrogen-containing gas filling and an activating compound applied to at least one of the electrodes. In order to ensure the required operating behavior of the surge arrester even at temperatures to 40%, the activating compound contains nickel powder in an amount of 30 to 35% by weight and potassium silicate in an amount of 25 to 30% by weight as basic components, sodium bromide in an amount of 15 to 20% by weight, as well as aluminum powder, sodium silicate and barium titanate as further components each in an amount of 5 to 10% by weight.

Abstract: An imaging device for forming an image on a printing form, includes an imaging head containing a multiplicity of mutually parallel conductive pins separated from one another by an insulating material, a voltage source for a high-frequency alternating voltage, and a multiplicity of electronic switches, respectively, connected at one end thereof to one of the conductive pins, and at the other end thereof to the voltage source. Also disclosed are a method of operating the imaging device, and a printing form whereon the imaging method is performed.

Abstract: In a frequency detection method for adjusting a clock signal frequency to the data rate of a received data signal, the clock signal which is predivided by a factor of 4. The predivided clock signal and the received data signal are each frequency-divided by the same division factor. The frequencies of the two frequency-divided signals are then determined by counting processes and are compared by a subtractor. The frequency difference that is determined is then converted into an analog output signal for controlling the clock signal frequency. This method can be applied in the transmission of data.

Abstract: A method provides that an initiating message is sent from a first service switching unit to a service control unit assigned to a supplementary service. In the service control unit there then takes place a comparison of a protocol supported by the first switching unit with a protocol necessary for the requested supplementary service. According to the result of the comparison, a second service switching unit, which can support the protocol necessary for the requested supplementary service, is determined, and a rerouting to the service switching unit is initiated.

Abstract: The output driver circuit of an integrated circuit has several pairs of driver circuits and driver control circuits as well as a control device. Each pair of driver control circuit and driver circuit forms a driver stage. The driver stages are connected in series. Based on the input signal of the output driver circuit, the control device switches the signal direction through the succession of driver stages in such a way that, at the time the output driver circuit is switched either on or off, the driver stages are switched in a time delayed manner, whereby current pulses on the feeding lines and disturbance voltages induced in inductive loads are reduced.

Abstract: The microprocessor device has a central processing unit in which the instructions that are stored in a program memory are converted into arithmetic or logical combinations for controlling the different components of the microprocessor. A data and/or control line bus enables data transfer and access to CPU-internal and/or peripheral-bound special function registers, which are assigned to the central processing unit. A coherent memory block with memory cells of the random access type is assigned to the central processing unit through the data and/or control line bus. The memory block has a dedicated address decoder and bus driver circuit, and has a first, arbitrarily usable and/or accessible memory area and a second, peripheral-independent and directly addressable memory area. The memory block is assigned an enable device which disables or enables the output of data contents from the second memory area onto the data and/or control line bus.

Abstract: The installation for moving persons from a mountain station to a valley station has a supporting cable which is guided via supporting pylons or the like. Carriages, to which there are attached transport assemblies, can be displaced along the supporting cable. Each transport assembly accommodates at least one person. The transport assembly may be a cabin, a chair, a supporting harness, or the like. A supporting and guide rail is fastened on the supporting cable and the carriage can be displaced along the supporting and guide rail from the mountain station into the valley station.

Abstract: The method and apparatus described are distinguished in that the data read out and the modified data are compared with one another before the data read out are overwritten with the modified data. Only those components of the data read out which differ from the modified data are overwritten. This is an extremely simple way of preventing changes to the stored data that were made between the time of reading out the data and overwriting the data from being unintentionally reversed.

Abstract: An air cushion guide for sheet or web-formed material that includes at least one guide member having a chamber and a surface formed with nozzle openings that may communicate with the chamber, through which air is blown between the guide member and the guided material for supporting the guided material on a supporting air cushion located above the guide member. Each of the nozzle openings has a cross sectional area. At least one moveable element is constructed to vary a volumetric flow of air emitted from the nozzle openings to form the air cushion guide. The moveable element is selected from the group consisting of a component having a movement which changes a number of the nozzle openings formed in the surface that are supplied with blown air, and at least one component having a movement that changes the cross sectional area of at least one of the nozzle openings formed in the surface. A control unit is provided for controlling a movement of the at least one moveable element.

Abstract: A ribbon is cut into signatures with a cutting cylinder having a fixed diameter and rotating at a variable angular velocity. During the cutting operation, the cutting cylinder rotates at an angular cutting velocity that is substantially equal to the constant velocity of the ribbon. The angular velocity of the cutting cylinder is varied between the cutting operations in order to cut signatures of a desired length. A cutting cylinder system is also provided.

Abstract: A separating device for elongate solid pieces includes a vibrating base with longitudinal grooves having a depth which decreases in a conveying direction, to allow efficient separation of elongate solid pieces, in particular of short pieces of wire, and to allow the separating device to operate continuously. The longitudinal grooves are adjoined by elongate, e.g. V-shaped, screen openings for separating the elongate solid pieces. Wide solid pieces can slide over the screen openings. The separating device is suitable in particular for separating small pieces of wire out of pyrolysis residue from a pyrolysis plant.

Abstract: Semiconductor chips are mounted in flip-chip technology on the multilayer wiring of the silicon carrier substrate. The underside of the substrate is provided with soldering contacts in the form of solder agglomerations forming a ball grid array (BGA). The underside is structured such that a cavity which narrows in the shape of a funnel from the underside up to the lowest conductor track plane is formed for each soldering contact. The cavities are each filled by the respective solder agglomeration and the solder agglomeration itself makes contact with the multilayer wiring.

Abstract: The computer controlled communication system has communication devices (KE1, . . . , KEn) and has data devices (DE1, . . . , DEn) that are connected to a network server (SR) via a local network (LAN), of which devices at least one communication device (KE1, . . . , KEn) and one data device (DE1, . . . , DEn) are respectively associated with a user and are functionally coupled in order to fulfill technical communication performance characteristics. Via a technical communication interface subassembly (VBT), the communication devices (KE1, . . . , KEn) are connected to the network server (SR), which is connected to an open or private switching center (PBX) via a transit switch (ISDN-A/Q), which network server has a gateway (GW) to couple the local network (LAN) to the communication network (ISDN).

Abstract: A micromechanical sensor integrated on a chip, includes a semiconductor substrate, an electronic circuit, a void, a diaphragm, a counterelectrode and valve openings connecting a volume of the void to its surroundings. The valve openings are directed toward an upper surface of the wafer, and the counterelectrode is a component part of a coating plane that extends over the entire chip surface, so that the electronic semiconductor circuit can be applied to the coating plane by known semiconductor technology. A method for producing the micromechanical sensor as well as a microphone or a pressure sensor having the micromechanical sensor, are also provided.

Abstract: A wafer with integrated circuits is held with a holding device having a support surface for the wafer. The support surface is subdivided into at least two segments, each with a temperature influencing device. The temperature of each segment can be set independently to different temperatures. The integrated circuits are tested while thermal contact is made between the wafer and the support surface. Those integrated circuits which are in thermal contact with the first segment are tested while the segment is kept at an essentially constant temperature. The temperature of the second segment is at the same time varied. The second segment is then tested at the changed temperature.

Abstract: An object hanging tool includes an elongated body member having at least one removable insert holder for removably fastening, to the body member, an insert for receiving and guiding a fastener to be secured to a structure. The insert holder is slidably disposed at an edge of the body member, and has a holder opening with a holder opening edge and a recessed border formed at least partly around the opening edge. The recessed border self-secures to an overhanging edge of the insert upon placing the insert into the holder opening. The recessed border can have a protrusion and the overhanging edge can have a recess, or vice-versa, the recess aligned with and corresponding to the protrusion. A shape of the recessed border can correspond with or be slightly smaller than a shape of the overhanging edge. The inserts are each configured to receive and guide fasteners such as nails and screws.