Abstract: A compound of the formula (I) is described where R1 and R2 are defined in the specification and p=q=r=0 or 1 with p+q+r?0. The compound of formula (I) has high dielectric anisotropy, thermally stable, fast response time and high voltage holding ratio, which is used as a liquid crystal medium for the liquid-crystal displays such as ECB, in-plane-switching (IPS) and VA display mode.

Abstract: A superconductor has a conductive path with a metallic substrate strip, a super-conductive layer made of a AB2CU3Ox type high-Tc-super conductive material, at least one insulating buffer layer which is arranged therebetween, and a metallic cover layer which is arranged thereon. At least one contacting element made of a normal conductive contacting material and arranged at least on one longitudinal side of the structure between the cover layer and the substrate strip enables a predetermined normally conductive limitation of the current-limiting device to be obtained.

Abstract: Concerning the compound of the formula (I) R1, R3 are each independently, for example, H R2, R4 are each independently, for example, H X1, X2 are each independently H or F M1 is —CO—O—, —O—CO—, —CH2—O—, —O—CH2—, —CF2—O—, —O—CF2—, —CH?CH—, —CF?CF—, —C?C—, —CH2—CH2—CO—O—, —O—CO—CH2—CH2—, —CH2—CH2—, —CF2—CF2—, —(CH2)4—, —OC(?O)CF?CF— or a single bond A1 is, for example, 1,4-phenylene, and R5 has the same possible definitions as specified for R2 and R4, with the exception of —M1-A1-R5, but independently of the particular definitions of R2 and R4 with the following provisos: 1) at least one of X1, X2 has to be F 2) R1, R2, R3 and R4 must not at the same time be H 3) at most two of R1, R2, R3 and R4 may be c).

Abstract: A process and a system are proposed for short-time arc-welding elements, such as for example metal studs, on to components, such as for example metal sheets, wherein an element in the context of a welding operation is initially raised in relation to the component, a welding arc is formed between the element and the component, and the element is lowered again, the lifting height of the element in relation to the component being detected at least within a time segment between raising and lowering of the element. The initiation of the lowering operation and/or the lowering operation itself is controlled as a factor of the detected lifting height such that a previously specified total welding time is achieved.

Abstract: An apparatus for remotely actuating a circuit breaker with two stable positions corresponding to a switch-on position and a switch-off position, has a drive mechanism with an electric motor. The apparatus further has first and second switches for switching the motor on and off, a transmission, a coupling mechanism for mechanically coupling the drive mechanism to the circuit breaker and a lever. The transmission can be positioned in two basic positions, and the lever is capable of being moved from a first end position into a second end position with the aid of the drive mechanism. The drive mechanism is configured such that, in the event of the lever being moved over manually from one end position into the other end position, one of the switches is actuated, with the result that the transmission is moved over from one basic position into the other basic position.

Abstract: The invention relates to a system for managing of communication between at least one client (10a-d) and at least one server (12a-d) with a primary broker (20) which comprises a first volatile memory (23) and which manages at least one request of the at least one client (10a-d) at the at least one server (12a-d). The system further comprises a backup broker (30) with a second volatile memory (33) which manages at least one request of the client (10a-d) at the server (12a-d), when the primary broker (20) has failed, wherein the primary broker (20) comprises a journal with entries on actions which may change the state of the first volatile memory (23) and sends these entries of the journal to the backup broker (30) such that the state of the second volatile memory (33) is essentially identical to the state of the first volatile memory (23).

Abstract: In the compound of the formula (I), where: R1, R2 are each independently, for example, H or a straight-chain or branched alkyl radical p, q are each independently 0 or 1, i.e. at the value zero, —H is present at the appropriate position instead of —F M1 is —CO—O—, —O—CO—, —CH2—O—, —O—CH2—, —CF2—O—, —O—CF2—, —CH?CH—, —CF?CF—, —C?C—, —CH2—CH2—CO——O—, —O—CO—CH2—CH2—, —CH2—CH2—, —CF2—CF2—, —(CH2)4—, —OC(?O)CF?CF— or a single bond A1 is, for example, 1,4-phenylene R5 has the same possible definitions as specified for R1 and R2, with the exception of —M1—A1—R5, but independently of the definition of R1 and R2 X is H, F, OF3, CF3, OCF2H with the following provisos: a) at least one of p, q has to be 1 b) R1 and R2 must not at the same time be H c) R2 and X must not at the same time be H.

Abstract: Disclosed is a ship propulsion system comprising a synchronous machine (6) with an especially superconducting rotor winding that is to be subjected to intense cooling and a normally conducting stator winding (11) which is to be cooled. The stator winding (11) is disposed at least in part inside a support structure (14) encompassing a hollow cylindrical magnetically soft outer body (13) and web-type support teeth (21i) that extend in an axial and radial direction. A hollow cylindrical part (15a) of an exterior housing (15) encloses the outer body (13). In order to cool at least some areas of said housing part (15a), the stator winding (11) is thermally coupled to water as a cooling medium (K) via the support structure (14) and the housing part (15a).

Abstract: A liquid-crystalline medium based on a mixture of polar compounds having at least one compound of the formula I in which R11, R12 and have the meanings indicated in claim 1, is described. Also described is the use thereof for an active-matrix display based on the VA, ECB, PALC, FFS or IPS effect.

Abstract: A cutting system for splitting pipes includes a main body and at least one blade and at least two blade mount assemblies by which the blade may optionally be connected to the main body. The first blade mount assembly, in a particular fitted state, holds the blade at a different distance from the longitudinal axis of the main body than the second blade mount assembly.

Abstract: A heating current used to inductively heat a metallic or magnetic work-piece is generated by an inverter supplied by a supply voltage. The inverter includes four switching elements arranged in an H-bridge circuit having two parallel longitudinal branches and a transverse branch. The switches are controlled so the heating current flows through the transverse branch. The diagonally opposed switching elements are switched from a conductive to a non-conductive state in a temporally staggered manner.

Abstract: The invention relates to a rapid arc welding system (10) for welding elements (12) onto components (14). The inventive system comprises a welding head (16), a supply device (24) for supplying elements (12) to the component (14) and a control and power device (20). Said control and power device comprises a safety circuit for controlling the safety functions of the welding system (10) which allows an operation that is especially safeguarded from unauthorized use of the system in which an operation disruption is partially cancelled. In this partial operation mode, individual components of the system (10) can be activated selectively, especially for the purpose of maintenance.

Abstract: A process and a system are proposed for short-time arc-welding elements, such as for example metal studs, on to components, such as for example metal sheets, wherein an element in the context of a welding operation is initially raised in relation to the component, a welding arc is formed between the element and the component, and the element is lowered again, the lifting height of the element in relation to the component being detected at least within a time segment between raising and lowering of the element. The initiation of the lowering operation and/or the lowering operation itself is controlled as a factor of the detected lifting height such that a previously specified total welding time is achieved.

Abstract: A process and a system are proposed for short-time arc-welding elements, such as for example metal studs, on to components, such as for example metal sheets, wherein an element in the context of a welding operation is initially raised in relation to the component, a welding arc is formed between the element and the component, and the element is lowered again, the lifting height of the element in relation to the component being detected at least within a time segment between raising and lowering of the element. The initiation of the lowering operation and/or the lowering operation itself is controlled as a factor of the detected lifting height such that a previously specified total welding time is achieved.

Abstract: Fluorinated five-membered ring compounds of the formula (I) R1—X—(A1—M1)a—(A2—M2)b—A3—Y—E ??(I) where E is a radical T—Z—R2 containing a five-membered ring and, for example, T is undirected and is 4-fluorothiophene-2,5-diyl, 3-fluorothiophene-2,5-diyl, 3-fluorothiophene-2,4-diyl, 5-fluorothiophene-2,4-diyl, furan-2,5-diyl, furan-2,4-diyl, isoxazole-3,5-diyl, thiazole-2,5-diyl, thiazole-2,4-diyl, cyclopentane-1,3-diyl or cyclopentene-1,3-diyl, R1 and R2 are hydrogen, X is a single bond, —O—, OC(?O)—, —C(?O)O— or —OC(?O)O—, Y is —OC(?O)—, —OCH2—, —CH2CH2—, Z is a single bond or —O—, A1, A2, A3 are each, independently of one another, phenylene-1,4-diyl, M1, M2 are undirected and are each, independently of one another, —OC(?O)—, —OCH2—, —CH2CH2—, —OC(?O)CH2CH2—, —OCH2CH2CH2—, —C?C—, —CH2CH2CH2CH2— or a single bond, a, b are each, independently of one another, 0 or 1, are used in FLC mixtures.

Abstract: A process and a system are proposed for short-time arc welding elements, such as for example metal studs, on to components, such as for example metal sheets, wherein an element in the context of a welding operation is initially raised in relation to the component, a welding arc is formed between the element and the component, and the element is lowered again, the lifting height of the element in relation to the component being detected at least within a time segment between raising and lowering of the element. The initiation of the lowering operation and/or the lowering operation itself is controlled as a factor of the detected lifting height such that a previously specified total welding time is achieved.

Abstract: Compounds of the general formula (I) where: R1, R2 are each independently a) H b) -M1-A1-R5 c) a straight-chain or branched alkyl radical having from 1 to 16 carbon atoms or a straight-chain or branched alkenyl radical having from 2 to 16 carbon atoms, where c1) one or more nonadjacent and nonterminal CH2 groups may be replaced by —O—, —C(?O)O—, —O—C(?O)—, —O—C(?O)—O—, —C(?O)— or —Si(CH3)2—, and/or c2) one CH2 group may be replaced by —C?C—, cyclopropane-1,2-diyl, cyclobutane-1,3-diyl, cyclohexane-1,4-diyl or phenylene-1,4-diyl, and/or c3) one or more hydrogen atoms may be replaced by F and/or Cl, p, q are each independently 0 or 1 G1-G2 is —CH2CH—, —CH?C—, —CH2CH2CH— or —CH?CH—CH— M1 is —CO—O—, —O—CO—, —CH2—O—, —O—CH2—, —CF2—O—, —O—CF2—, —CH?CH—, —CF?CF—, —C?C—, —CH2—CH2—CO—O—, —O—CO—CH2—CH2—, —CH2—CH2—, —CF2—CF2—, —(CH2)4—, —OC(?O)CF?CF— or a single bond, A1 is 1,4-phenylene where one or two hydrogen atoms may be replaced by F, Cl, CN and/or OCF3, or up to three hydrogen atoms may be replaced by

Abstract: The invention relates to fluorinated aromatics of the formula (I) where X is CH2, C?O, CF2, O or S, Y is H or F, with the proviso that Y has to be F when X is CH2, and where the other parameters are as defined in claim 1, and also to their use in liquid-crystal mixtures, and also to liquid-crystal mixtures comprising these compounds and to liquid-crystal displays comprising these mixtures.

Abstract: Compounds of the formula (I) in which the parameters are as defined herein, are suitable for use in liquid-crystal media and liquid-crystal displays which contain these media.

Abstract: A process and a system are proposed for short-time arc welding, in particular for stud welding, with the step of sampling a welding parameter, in particular the arc voltage (U), during at least one time segment (Ts) of the welding operation, in order to detect disturbances, wherein the measurement curve determined from the sampling operation is smoothed and subsequently wherein at least one tolerance curve is generated which lies at a previously adjustable distance from the smoothed measurement curve, and subsequently the unsmoothed measurement curve is compared with the tolerance curve in order to detect high-frequency disturbances.