Abstract: Elastomer isoprene rubber compositions contain an effective amount of a polyfunctional coupling system (A) as an inorganic-elastomer filler coupling agent, and (B) at least one elastomer of natural or synthetic rubber; (C) an inorganic filler as reinforcing filler; (D) other conventional constituents or additives comprising one or more vulcanizing agent(s), the polyfunctional coupling system being of the constituents (A1) and (A2): (A1) is at least one coupling agent selected from among the functionalized organosilicon compounds of formula (I): [(G0)3SiO1/2]m[(G0)2SiO2/2]n[G0SiO3/2]o[SiO4/2]p[(G2)a(G1)a?(Z—CO—N?N—CO-A)SiO(3-a-a?)/2]q and (A2) is at least one coupling agent selected among polysulfurated “symmetric” silanes, or sulfurated “asymmetric” silanes.

Abstract: Elastomeric isoprene rubber compositions contain an effective amount of a coupling system (A) as an inorganic filler/elastomer coupling agent, and (B) at least one natural or synthetic rubber elastomer, (C) an inorganic filler as reinforcing filler, (D) other conventional constituents or additives comprising (a) vulcanization agent(s), the coupling system (A) being a particular mixture of the following combination of constituents (A1) and (A2): (A1) is at least one coupling agent selected from among the following functionalized organosilicon compounds of formula (I):[(G0)3SiO1/2]m[(G0)2SiO2/2]n[G0SiO3/2]o[SiO4/2]p[(G2)a(G1)a?(Z—CO—N?N—CO-A)SiO(3-a-a?)/2]g and (A2) is at least one coating agent for the reinforcing filler including one compound with the single function Y in the structure thereof which is capable of bonding physically and chemically to the inorganic filler and resulting in an increase in dispersion of the charge within the rubber matrix and a reduction in viscosity of the composition.

Abstract: Elastomeric isoprene rubber compositions contain an effective amount of a coupling agent (A) comprising an organosilicon compound with coupling agent functions for inorganic/elastomeric fillers and include (B) at least one natural or synthetic rubber elastomer, (C) an inorganic filler as reinforcement filler, (D) other conventional constituents or additives comprising vulcanization agents; the coupling agent (A) being a functionalized organosilicon compound, including the following two compounds (i) and (2i), (i) being at least one functionalized siloxane corresponding to the formula (I): [(G0)3SiO1/2]m [(G0)2SiO2/2]n [G0SiO3/2]o [SiO4/2]p [(G2)a(G1)a?(Z—CO—N?N—CO-A)SiO(3-a-a?)/2]q and (2i) being a mixture of at least one functionalized siloxane (i) with (3i) at least one functionalized organosilane also corresponding to formula (I) where m=n=o=p=0 (zero), q=1, a=0, 1, 2 or 3 and the sum a+a?=3.

Abstract: The invention relates to the use of an effective amount of a coupling system (A) as an inorganic filler/elastomer coupling agent in rubber compositions comprising: (B) at least one natural or synthetic rubber elastomer, (C) an inorganic filler as reinforcing filler, (D) all or part of the other constituents or additives normally used particularly comprising (a) vulcanisation agent(s) the use being characterised in that: the coupling system (A) is a particular mixture of the following combination of ingredients (A1) and (A2): (A1) is at least one coupling agent selected from the following functionalised organosilicon compounds of formula (I): [(G0)3SiO1/2]m[(G0)2SiO2/2]n[G0SiO3/2]o[SiO4/2]p[(G2)a(G1)a(Z-CO—N?N—CO-A)SiO(3-a-a?)/2]g where the symbols Z, A, G0, G1, G2, a, a?, m, n, o, p and q have the definitions given in claim 1, (A2) is at least one coating agent for the reinforcing filler comprising one compound with the single function Y in the structure thereof which is capable of bonding physically and chem

Abstract: Elastomeric isoprene rubber compositions contain an effective amount of a coupling agent (A) comprising an organosilicon compound with coupling agent functions for inorganic/elastomeric fillers and include (B) at least one natural or synthetic rubber elastomer, (C) an inorganic filler as reinforcement filler, (D) other conventional constituents or additives comprising vulcanization agents; the coupling agent (A) being a functionalized organosilicon compound, including the following two compounds (i) and (2i), (i) being at least one functionalized siloxane corresponding to the formula (I): [(G0)3SiO1/2]m[(G0)2SiO2/2]n[G0SiO3/2]o[SiO4/2]p[(G2)a(G1)a?(Z-CO N?N—CO-A)SiO(3-a-a?)/2]q and (2i) being a mixture of at least one functionalized siloxane (i) with (3i) at least one functionalized organosilane also corresponding to formula (I) where m=n=o=p=0 (zero), q=1, a=0, 1, 2 or 3 and the sum a+a?=3.

Abstract: Elastomer isoprene rubber compositions contain an effective amount of a polyfunctional coupling system (A) as an inorganic-elastomer filler coupling agent, and (B) at least one elastomer of natural or synthetic rubber; (C) an inorganic filler as reinforcing filler; (D) other conventional constituents or additives comprising one or more vulcanizing agent(s), the polyfunctional coupling system being of the constituents (A1) and (A2): (A1) is at least one coupling agent selected from among the functionalized organosilicon compounds of formula (I): [(G0)3SiO1/2]m [(G0)2SiO2/2]n [G0SiO3/2]o [SiO4/2]p [(G2)a(G1)a?(Z-CO—N?N—CO-A)SiO(3-a-a?)/2]q and (A2) is at least one coupling agent selected among polysulfurated “symmetric” silanes, or sulfurated “asymmetric” silanes.

Abstract: A simulator for a design of an electronic system includes high-level delay models for architecture resources such as ASICs, CPUs, and busses, for example. The delay models of pipelined ASICs compute static pipeline delays which are then implemented by the system simulator. The ASIC delay models are generic, dynamic, incremental and not intrusive.

Abstract: A method and system reduces the complexity of functions within a Boolean network by breaking the network at certain nodes. Before the flattening phase of a technology independent optimization, the present invention estimates the on-set and off-set complexities of each node of the network. The complexities are estimated by considering the type of function represented by the node, the estimated complexities of any child nodes, and the number of variables in the support of the node. If a node's estimated complexity exceeds a defined complexity limit, then the network is preferably broken at that node. A new node of the same type as the complex node is created, and child nodes of the complex node are appended to the newly created node. In addition, an intermediate node is created as a child of the complex node and the child nodes are removed from the complex node.

Abstract: The invention relates to a computer implemented process for fixing hold time violations in hierarchical designs of electronic circuits. The process comprises the steps of:1) synthesizing a RTL-HDL type description of the circuit to form a synthesized design,2) synthesizing a clock tree and adding it to the synthesized design produced in step 1,3) optimizing the synthesized design resulting from step 2, and fixing upper-bounded timing constraints by using a real clock timing (latency and skew) and worst case conditions,4) fixing lower-bounded timing violations in the optimized synthesized design resulting from step 3, using a real clock timing, using best case conditions,5) re-fixing possible upper-bounded timing constraints newly created and possible upper-bounded timing constraints increased in step 4,6) fixing post-layout upper-bounded timing violations.

Abstract: In a computer aided design system for assisting in the design and analysis of integrated circuits, users can specify an integrated circuit using either a conventional circuit component netlist, or an HDL circuit description. Timing constraints are specified using conventional system level timing constraints, at least one clock timing constraint and a plurality multi-cycle timing constraints specifying clock based timing constraints for the transmission of data between sequential data elements in which at least a subset of the clock based timing constraints concern timing constraints for duration longer than a single clock period. In addition, the user may provide the system with a plurality of constraint based timing path specifications, each indicating signal paths through the integrated circuit to which specified ones of the multi-cycle timing constraints are applicable and signal paths to which the specified ones of the multi-cycle timing constraints are not applicable.

Abstract: Process for the processing of logic function specification data of an associated specific integrated circuit or ASIC for a graphical representation of said circuit. The process consists of associating with the specification data Boolean attributes as a function of aspects, characteristics and details which a user wishes to know with respect to the circuit and then constructing data representative of said characteristics. One representation of the circuit can then be displayed by associating graphical symbols with the constructed data.