Abstract: An optical beam intensity modulator comprising a modulator element arranged to transmit an optical beam along a first path in a first modulator state as a first beam and along a second, deviated path in a second modulator state as a second beam, and a beam return element arranged to return a transmitted beam to the modulator element.

Abstract: An augmented connection graph can be created based on a task to be performed by a fog computing node by augmenting a connection graph representing plurality of IoT devices and connections among them. The augmenting can include adding to the connection graph data type nodes representing types of data processed by the fog computing node and adding connections between the data type nodes and IoT devices that generate the type of data represented by the respective data type nodes. A connection can be added between each pair of the IoT devices that are not currently connected and for which a level of correlation between the pair of IoT devices at least equals a threshold value. Based on the augmented connection graph, at least one of the IoT devices to assign to the fog computing node can be determined and assigned to the fog computing node.

Abstract: A computer-implemented method is provided for optimizing scheduling and resource allocation for a workflow. The method includes receiving i) resource information representing resources available for allocation to the workflow and ii) one or more workflow constraints. The method determines one or more probable sequences for executing the workflow. Each probable sequence includes tasks usable to execute at least a portion of the workflow. Each task is assigned a probability of task execution. The method assigns a probability of sequence execution to each of the probable sequences based on the probability of task execution of the tasks forming the probable sequence. The method further determines an optimized scenario for scheduling the workflow based on the probable sequences. The optimized scenario can have an optimized probability of completion.

Abstract: A method and apparatus for generating and transmitting high energy optical pulses are described. Distributed temperature sensors usually use Raman scattering in optical fibres as the means to determine the temperature. Here, light from a laser source is sent down a fibre and the small amount of light that is scattered back towards the source is analysed. As the fibre length increases, the resolutions of the temperature and loss measurements become poorer. This is because losses in an optical fibre attenuate the signal. An obvious solution to this problem is to launch more light into the fibre to compensate for the losses but stimulated Raman scattering limits how much light may be launched. The present invention solves this problem by using a pulse conversion method to maximise the resultant pulse energy while the power is kept below SRS threshold.

Abstract: In a high bit rate optical communications system, a clock signal is recovered from a received optical data signal by comparison of the data signal with an optical pulse stream derived from a local oscillator running at a sub-multiple of the signal bit rate. The oscillator forms part of a phase locked loop, and the signal comparison is made via a two photon absorber element which responds to a combination of the photon energies of the data signal and the locally generated pulse signal. The oscillator output is then used as a local clock for de-multiplexing purposes.

Abstract: A compound of formula ##STR1## in which A represents S;R.sub.1 is selected from the group consisting of OH, (C.sub.1 -C.sub.12)alkyl, (C.sub.1 -C.sub.12)alkoxy, benzyloxy, phenyl, benzyl (C.sub.1 -C.sub.4)alkyl NZ.sub.1 Z.sub.2, and NZ.sub.1 Z.sub.2 ;R.sub.2 is selected from the group consisting of OH, SH, (C.sub.1 -C.sub.4)alkoxy, (C.sub.1 -C.sub.4)alkylthio, and NZ.sub.1 Z.sub.2 ;R.sub.3 is selected from the group consisting of H, (C.sub.1 -C.sub.4)alkyl, (C.sub.1 -C.sub.4)alkylthio, (C.sub.1 -C.sub.4)alkoxy, phenyl, and benzyl;B is selected from the group consisting of phenyl; pyridyl; phenyl substituted by one or more groups selected from halo, (C.sub.1 -C.sub.6)alkyl, (C.sub.1 -C.sub.6)alkoxy, CF.sub.3, CH.sub.2 NZ.sub.1 Z.sub.2, and NZ.sub.1 Z.sub.2 wherein Z.sub.1 and Z.sub.2 are selected, independently of each other, from the group consisting of H, (C.sub.1 -C.sub.6)alkyl, formyl, and benzyl or --NZ.sub.1 Z.sub.

Abstract: Compounds of formula ##STR1## in which R.sub.1 represents OH, (C.sub.1 -C.sub.12)alkyl, (C.sub.1 -C.sub.12)alkoxy, benzyloxy, benzyl, phenyl, (C.sub.1 -C.sub.4)alkylNZ.sub.1 Z.sub.2 or NZ.sub.1 Z.sub.2 ; R.sub.2 represents OH, SH, (C.sub.1 -C.sub.4)alkoxy, (C.sub.1 -C.sub.4)alkylthio or NZ.sub.1 Z.sub.2 ; R.sub.3 represents H, (C.sub.1 -C.sub.4)alkyl, (C.sub.1 -C.sub.4)alkylthio, (C.sub.1 -C.sub.4)alkoxy, phenyl or benzyl; A represents N and R represents H or (C.sub.1 -C.sub.4)alkyl which can be substituted by phenyl or NZ.sub.1 Z.sub.2 ; B represents phenyl which is coupled to the pyridyl ring and is optionally substituted by one or more groups chosen from halo, (C.sub.1 -C.sub.6)alkyl, (C.sub.1 -C.sub.6)alkoxy, CF.sub.3, CH.sub.2 NZ.sub.1 Z.sub.2 or NZ.sub.1 Z.sub.2 ; and Z.sub.1 and Z.sub.2 represent, independently of each other, H, (C.sub.1 -C.sub.6) alkyl, formyl or benzyl, or they form with the nitrogen atom to which they are attached an optionally substituted saturated heterocycle and their salts.

Abstract: The present invention relates to new quinolylglycinamide derivatives corresponding to the following general formula: ##STR1## The invention also relates to a process for preparing these compounds and their therapeutic application as a psychotropic agent.