Abstract: Disclosed is a compound with the following formula (I): as well as the use thereof, in particular as a chelating agent of positively charged ions, or as a fluidizing agent for hydraulic compositions. Also disclosed is a hydraulic composition comprising a compound with formula (I), at least one hydraulic binder, at least one aggregate, and water.

Abstract: Methods and systems for determining a status of a hydrocarbon production site are provided. The systems and methods include defining an area about a hydrocarbon well location and obtaining a time series of mobile geolocation data for at least one mobile device located within the area about the hydrocarbon well location. The times series of mobile geolocation data is processed and probabilities that the mobile geolocation data is associated with a drilling activity, a fracking activity, a tie-in activity, and/or an absence of drilling activity, fracking activity, and/or tie-in activity are output. The mobile geolocation data is categorized, based on the probabilities, as being associated with one of drilling activity, fracking activity, or absence of drilling activity and fracking activity.

Abstract: A three-dimensional (3D) seismic data set is divided into a plurality of 3D source wavefield subsets, each 3D source wavefield subset is stored in an array element of an array. For each array element, the associated 3D source wavefield is decomposed into a smaller data unit; data boundaries of the smaller data units are randomly shifted; a folding operation and a sample operator is applied to the smaller data units to keep the smaller data units from overlapping; the folded smaller data units are smoothed to generate smoothed data; a quantization operation is performed on the smoothed data to produce quantized data; and the quantized data is compression encoded to generate compressed data. The compressed data associated with each array element is decompressed to generate a 3D seismic output image.

Abstract: A method of reducing surface-scattered noise includes receiving seismic data associated with a marine region, where the marine region includes an ocean bottom, a first zone including water above the ocean bottom, and a second zone including earth subsurface layers below the ocean bottom, and the received seismic data includes signals reflected from the earth subsurface layers and surface-scattered noise reflected from the ocean bottom and an ocean surface; determining a water velocity for the first zone; determining bathymetric values of the ocean bottom; based on the determined water velocity and the bathymetric values, determining a velocity model for the marine region; based on the determined velocity model and wavelet functions of seismic source signals, calculating the surface-scattered noise by solving a wave equation; and determining the signals reflected from the earth subsurface layers by subtracting the calculated surface-scattered noise from the received seismic data.

Abstract: The present disclosure describes methods and systems, including computer-implemented methods, computer program products, and computer systems, for modeling angle domain common image gathers (ADCIG) from reverse time migration (RTM). One computer-implemented method includes calculating seismic source and receiver wavefields based on seismic data, calculating characteristic source and receiver wavefields from the seismic source and receiver wavefields, calculating propagation angles for the characteristic source and receiver wavefields, applying a wavefield decomposition algorithm on the characteristic source and receiver wavefields to obtain corresponding directional source and receiver wavefields, the wavefield decomposition algorithm decomposing wavefield amplitude of a wavefield in an angle interval centered on a propagation angle of the wavefield, and forming ADCIG by applying an image condition to the obtained directional source and receiver wavefields.

Abstract: Methods and systems for determining a status of a hydrocarbon production site are provided. The systems and methods include defining an area about a hydrocarbon well location and obtaining a time series of mobile geolocation data for at least one mobile device located within the area about the hydrocarbon well location. The times series of mobile geolocation data is processed and probabilities that the mobile geolocation data is associated with a drilling activity, a fracking activity, a tie-in activity, and/or an absence of drilling activity, fracking activity, and/or tie-in activity are output. The mobile geolocation data is categorized, based on the probabilities, as being associated with one of drilling activity, fracking activity, or absence of drilling activity and fracking activity.

Abstract: The present disclosure describes methods and systems, including computer-implemented methods, computer program products, and computer systems, for modeling angle domain common image gathers (ADCIG) from reverse time migration (RTM). One computer-implemented method includes calculating seismic source and receiver wavefields based on seismic data, calculating characteristic source and receiver wavefields from the seismic source and receiver wavefields, calculating propagation angles for the characteristic source and receiver wavefields, applying a wavefield decomposition algorithm on the characteristic source and receiver wavefields to obtain corresponding directional source and receiver wavefields, the wavefield decomposition algorithm decomposing wavefield amplitude of a wavefield in an angle interval centered on a propagation angle of the wavefield, and forming ADCIG by applying an image condition to the obtained directional source and receiver wavefields.

Abstract: A three-dimensional (3D) seismic data set is divided into a plurality of 3D source wavefield subsets, each 3D source wavefield subset is stored in an array element of an array. For each array element, the associated 3D source wavefield is decomposed into a smaller data unit; data boundaries of the smaller data units are randomly shifted; a folding operation and a sample operator is applied to the smaller data units to keep the smaller data units from overlapping; the folded smaller data units are smoothed to generate smoothed data; a quantization operation is performed on the smoothed data to produce quantized data; and the quantized data is compression encoded to generate compressed data. The compressed data associated with each array element is decompressed to generate a 3D seismic output image.

Abstract: A method of reducing surface-scattered noise includes receiving seismic data associated with a marine region, where the marine region includes an ocean bottom, a first zone including water above the ocean bottom, and a second zone including earth subsurface layers below the ocean bottom, and the received seismic data includes signals reflected from the earth subsurface layers and surface-scattered noise reflected from the ocean bottom and an ocean surface; determining a water velocity for the first zone; determining bathymetric values of the ocean bottom; based on the determined water velocity and the bathymetric values, determining a velocity model for the marine region; based on the determined velocity model and wavelet functions of seismic source signals, calculating the surface-scattered noise by solving a wave equation; and determining the signals reflected from the earth subsurface layers by subtracting the calculated surface-scattered noise from the received seismic data.

Abstract: A directly modulated multi-electrode DFB laser is used to transmit information in a TWDM environment where the output power and the output wavelength of the laser output signal are determined by the ratios of bias currents simultaneously applied to the electrodes of the laser by a control circuit. The total amount of current applied to the electrodes is kept to a constant value to maintain the temperature of the laser constant. The electrodes of the DFB laser are positioned so as not to experience any thermal coupling between them or with any other component of the DFB laser.

Abstract: A venturi eductor comprising a flow passage for a first liquid, a dispensing passage with an opening into the flow passage to allow a second liquid to be drawn therethrough and into a first liquid flowing through the flow passage, and a flow restrictor in the dispensing passage, in which the flow restrictor comprises a body with a plurality of nozzles passing therethrough with varying sizes of orifice, which body is movable between a first position in which a first of said nozzles is disposed in the path of the second liquid, and further positions in each of which a further of said nozzles is disposed in the path of the second liquid.

Abstract: An optical receiver has a monolithically integrated electrical and optical circuit that includes a substrate with a planar surface. Along the planar surface, the monolithically integrated electrical and optical circuit has an optical hybrid, one or more variable optical attenuators, and photodetectors. The optical hybrid is connected to receive light beams, to interfere light of said received light beams with a plurality of relative phases and to output said interfered light via optical outputs thereof. Each of the one or more variable optical attenuators connects between a corresponding one of the optical outputs and a corresponding one of the photodetectors.

Abstract: A wireless transmitter includes an optical modulator, an optical power splitter, a plurality of electrical drivers, and a plurality of antennas. The optical power splitter has a plurality of optical outputs and has an optical input connected to receive a modulated optical carrier from the optical modulator. Each driver is configured to detect a portion of the modulated optical carrier output by one of the optical outputs of the optical power splitter. Each antenna is connected to be driven by one of the electrical drivers.

Abstract: A method for fabricating a bipolar transistor includes forming a vertical sequence of semiconductor layers, forming an implant mask on the last formed semiconductor layer, and implanting dopant ions into a portion of one or more of the semiconductor layers. The sequence of semiconductor layers includes a collector layer, a base layer that is in contact with the collector layer, and an emitter layer that is in contact with the base layer. The implanting uses a process in which the implant mask stops dopant ions from penetrating into a portion of the sequence of layers.

Abstract: An apparatus includes a light detector. The light detector includes a substrate with a planar surface and an array of photodiodes located along the planar surface. Each photodiode has a sequence of different semiconductor layers stacked vertically over the planar surface. The photodiodes are electrically connected in series.

Abstract: A method for fabricating a bipolar transistor includes forming a vertical sequence of semiconductor layers, forming an implant mask on the last formed semiconductor layer, and implanting dopant ions into a portion of one or more of the semiconductor layers. The sequence of semiconductor layers includes a collector layer, a base layer that is in contact with the collector layer, and an emitter layer that is in contact with the base layer. The implanting uses a process in which the implant mask stops dopant ions from penetrating into a portion of the sequence of layers.

Abstract: An optical integrated circuit comprises a semiconductor body, a semiconductor optical waveguide located on the body, and a bipolar phototransistor located on and optically coupled to the waveguide. In a preferred embodiment, the base region of the transistor is configured to absorb radiation propagating in the waveguide, but the emitter and collector regions are both configured not to absorb the propagating radiation. In a further preferred embodiment, the waveguide is configured to guide the radiation along a propagation axis therein, and the transistor makes an elongated footprint along the waveguide, the footprint being elongated along the direction of the propagation axis. In another preferred embodiment, the footprint is at least three times longer along the propagation axis than along a direction perpendicular thereto.

Abstract: Apparatus comprising: a first compound semiconductor composition layer doped to have a first charge carrier polarity; a second compound semiconductor composition layer doped to have a second charge carrier polarity and located on the first layer; a third compound semiconductor composition layer doped to have the first charge carrier polarity and located on the second layer; a base electrode on the second layer; and a spacer ring interposed between and defining a charge carrier access path distance between the base electrode and the third layer, the path distance being within a range of between about 200 ? and about 1000 ?. Techniques for making apparatus. Apparatus is useful as a heterobipolar transistor, particularly for high frequency applications.

Abstract: Microelectronic apparatus having protection against high frequency crosstalk radiation, comprising: a planar insulating substrate; an active semiconductor electronic device located over a first region of the insulating substrate; and a doped semiconductor located in a second region of the insulating substrate substantially surrounding the first region. Apparatus further comprising a dissipative conductor overlaying and adjacent to the doped semiconductor. Apparatus additionally comprising metallic test probe contacts making electrical connections with the active semiconductor electronic device. Application of the apparatus to dissipate crosstalk radiation having a center frequency within a range between about 1 gigahertz and about 1,000 gigahertz. Methods for making the apparatus.

Abstract: A method for fabricating a bipolar transistor includes forming a vertical sequence of semiconductor layers, forming an implant mask on the last formed semiconductor layer, and implanting dopant ions into a portion of one or more of the semiconductor layers. The sequence of semiconductor layers includes a collector layer, a base layer that is in contact with the collector layer, and an emitter layer that is in contact with the base layer. The implanting uses a process in which the implant mask stops dopant ions from penetrating into a portion of the sequence of layers.