Abstract: This invention relates to a polymer polyol comprising: (a) a dispersed phase formed by polymeric particles which are the polymerization product of a polystyrene pyrolysis oil, and acrylonitrile; or alternatively, of a polystyrene pyrolysis oil, acrylonitrile, and styrene monomer; and (b) a continuous phase comprising (b1) a polyol, to compositions comprising or made from the polymer polyol, such as polyurethane (foams). The invention also relates to a process for preparing polymer polyols using pyrolysis oil of polystyrene; as well as processes for the preparation of the compositions comprising or made from the polymer polyol.

Abstract: The present invention refers to the use of hydrofoil impellers for the preparation of polymer polyols and to a method for preparing a polymer polyol, which comprises reacting a base polyol, at least one ethylenically unsaturated monomer and a macromer or a preformed stabilizer in the presence of a free-radical initiator and optionally a chain transfer agent in a reactor, wherein said reactor is stirred by means of a stirring system comprising a shaft rotatable about its longitudinal axis, and a plurality of radially extending hydrofoil impellers mounted on the shaft and respectively axially spaced apart and wherein the reactor does not contain baffles.

Abstract: To provide a lightweight and robust voltage amplifier and current amplifier for a test device for testing an electrical component, an amplifier is designed to output a test signal at a signal output between a positive output terminal and a negative output terminal. The amplifier includes a first half bridge and a second half bridge. A switching unit is provided, which is designed to connect the first half bridge and the second half bridge in parallel to the signal output in a first operating mode and to connect the first half bridge and the second half bridge in series with the signal output in a second operating mode.

Abstract: The present invention refers to the use of hydrofoil impellers for the preparation of polymer polyols and to a method for preparing a polymer polyol, which comprises reacting a base polyol, at least one ethylenically unsaturated monomer and a macromer or a preformed stabilizer in the presence of a free-radical initiator and optionally a chain transfer agent in a reactor, wherein said reactor is stirred by means of a stirring system comprising a shaft rotatable about its longitudinal axis, and a plurality of radially extending hydrofoil impellers mounted on the shaft and respectively axially spaced apart and wherein the reactor does not contain baffles.

Abstract: Method and system for mutual authentication. The system comprises: a virtual keyboard generation unit (210) for obtaining (110) a keyboard configuration (112) of a user (201), including graphical features (114), arrangements (116) and keyboard generation rules (118); and generating (120) a virtual keyboard (212) formed by keys (214) with combination of graphics features (114) in certain arrangements (116) based on the keyboard generation rules (118); an input interface (230) for receiving (140) a key selection (144) of the virtual keyboard (212); an authentication unit (240) for applying (160) user authentication rules (152) on the virtual keyboard (212), obtaining at least one correct key sequence (162), and authenticating (170) to the user (201) if the key selection (144) is validated with respect to a correct key sequence (162).

Abstract: An assembly for stored containment of fuel including a high-strength, impact resistant container having a hermetically sealed, fuel containing chamber and a nozzle operatively connected in fluid communication with the chamber. The nozzle includes a conduit disposed in fluid communication with the chamber and a sleeve movable relative to the conduit, between an inward retracted position and an outwardly extended position. The conduit at least partially defines a liquid flow path out of the chamber and a gaseous flow path into the chamber is disposed between the conduit and the sleeve. A seal assembly is mounted on the sleeve and movable therewith relative to the conduit to define a first opening of the liquid flow path and a subsequent opening of the gaseous flow path, both into fluid communication with and between the chamber and an exterior of the nozzle.

Abstract: An ergometric treadmill for sport training comprising a screen, a control system and a system configured for collecting, processing, analyzing and visualizing the biomechanical response of a sportsperson while running on the ergometric treadmill; wherein the ergometric treadmill comprises (a) a plurality of MEMS sensors attached by means of supports to the ergometric treadmill connected to a data capture unit; and (b) a data processing unit configured to generate a plurality of parameters related to the physical exercise performed on the ergometric treadmill by a user and synthesize and show, in graphic form, the parameters generated for the user's biofeedback from the treadmill.

Abstract: The present invention refers to macroinitiators of general formula (HO)x—Ra—(O—C(?O)—Rb—C(?O)—O—O—Rc)y, a process for obtaining them, as well as their use in the synthesis of polymer polyols. It also relates to the resulting polymer polyol, as well as to a dispersant obtainable in the process for preparing the polymer polyol, said dispersant being obtained by reacting said macroinitiator with at least one ethylenically unsaturated monomer.

Abstract: A light cable for conveying light from a light source to an endoscope includes a first connector at a proximal end of the light cable for connecting to the light source; a second connector at a distal end of the light cable for connecting to the endoscope; a light guide for conveying light received from the light source to the endoscope; a first wireless antenna positioned at the proximal end for wireless communication with the light source; and a second wireless antenna positioned at the distal end for wireless communication with the endoscope.

Abstract: To provide a lightweight and robust voltage amplifier and current amplifier for a test device for testing an electrical component, an amplifier is designed to output a test signal at a signal output between a positive output terminal and a negative output terminal. The amplifier includes a first half bridge and a second half bridge. A switching unit is provided, which is designed to connect the first half bridge and the second half bridge in parallel to the signal output in a first operating mode and to connect the first half bridge and the second half bridge in series with the signal output in a second operating mode.

Abstract: A drape for a medical device, the drape including a flexible drape material for covering at least a portion of a medical device and configured to be cinched in at least one location to form an enclosed space for enclosing the at least a portion of the medical device, and a vacuum manifold that, when the flexible drape material is cinched, is positioned at least partially within the enclosed space for creating a vacuum in the enclosed space to cause the flexible drape material to conform to the at least a portion of the medical device when the at least a portion of the medical device is positioned within the enclosed space.

Abstract: An assembly for stored containment of fuel including a high-strength, impact resistant container having a hermetically sealed, fuel containing chamber and a nozzle operatively connected in fluid communication with the chamber. The nozzle includes a conduit disposed in fluid communication with the chamber and a sleeve movable relative to the conduit, between an inward retracted position and an outwardly extended position. The conduit at least partially defines a liquid flow path out of the chamber and a gaseous flow path into the chamber is disposed between the conduit and the sleeve. A seal assembly is mounted on the sleeve and movable therewith relative to the conduit to define a first opening of the liquid flow path and a subsequent opening of the gaseous flow path, both into fluid communication with and between the chamber and an exterior of the nozzle.

Abstract: The present invention refers to a method for the preparation of a polymer polyol which comprises: (i) preparing an intermediate in a first reactor by polymerizing a mixture comprising: (a) a base polyol in an amount from 60 to 100 wt % of the total amount of base polyol, (b) at least one ethylenically unsaturated monomer, (c) an acylperoxide radical initiator in an amount from 50 to 90 wt % of the total amount of acylperoxide radical initiator, and (d) a preformed stabilizer in an amount from 70 to 100 wt % of the total amount of preformed stabilizer or a macromer in an amount of from 70 to 100 wt % of the total amount of macromer; (ii) polymerizing in a second reactor a mixture comprising the intermediate prepared in step (i), the balance acylperoxide radical initiator proportion, the balance preformed stabilizer or macromer proportion and the balance base polyol proportion; wherein the at least one ethylenically unsaturated monomer is added only to the first reactor.

Abstract: The present invention refers to a method for the preparation of a polymer polyol which comprises: (i) preparing an intermediate in a first reactor by polymerizing a mixture comprising: (a) a base polyol in an amount from 60 to 100 wt % of the total amount of base polyol, (b) at least one ethylenically unsaturated monomer, (c) an acylperoxide radical initiator in an amount from 50 to 90 wt % of the total amount of acylperoxide radical initiator, and (d) a preformed stabilizer in an amount from 70 to 100 wt % of the total amount of preformed stabilizer or a macromer in an amount of from 70 to 100 wt % of the total amount of macromer; (ii) polymerizing in a second reactor a mixture comprising the intermediate prepared in step (i), the balance acylperoxide radical initiator proportion, the balance preformed stabilizer or macromer proportion and the balance base polyol proportion; wherein the at least one ethylenically unsaturated monomer is added only to the first reactor.

Abstract: An aerodynamic surface for an aircraft, comprising a torsion box, a movable control surface, and a central element, the torsion box comprising a rear spar, upper and lower covers, and the movable control surface comprising a leading edge, a front spar, a hinge line, a beam having a first end and a second end, and a counterweight attached to the second end of the beam. The first end of the beam is attached to the front spar, and the second end is projected beyond at least the hinge line so that the counterweight is arranged between the upper and lower covers extending from the rear spar of the torsion box towards the movable control surface.

Abstract: A method for watermarking documents comprising: identifying and locating spaces in a received original document (10) by a location analysis (110) module which distinguishes between intra-word spaces and inter-word spaces; minimizing an error probability of interference between intra-word spaces and inter-word spaces in the watermarked document (20) by an optimization module (111); encoding (113) the message (30) into codewords and encoding (114) the codewords into the watermark; embedding the watermark to generate (115) the watermarked document (20) by modifying the intra-word spaces and inter-word spaces of the original document (10).

Abstract: A method for watermarking documents comprising: identifying and locating spaces in a received original document (10) by a location analysis (110) module which distinguishes between intra-word spaces and inter-word spaces; minimizing an error probability of interference between intra-word spaces and inter-word spaces in the watermarked document (20) by an optimization module (111); encoding (113) the message (30) into codewords and encoding (114) the codewords into the watermark; embedding the watermark to generate (115) the watermarked document (20) by modifying the intra-word spaces and inter-word spaces of the original document (10).

Abstract: An ergometric treadmill for sport training comprising a screen, a control system and a system configured for collecting, processing, analyzing and visualizing the biomechanical response of a sportsperson while running on the ergometric treadmill; wherein the ergometric treadmill comprises (a) a plurality of MEMS sensors attached by means of supports to the ergometric treadmill connected to a data capture unit; and (b) a data processing unit configured to generate a plurality of parameters related to the physical exercise performed on the ergometric treadmill by a user and synthesize and show, in graphic form, the parameters generated for the users biofeedback from the treadmill.

Abstract: An aerodynamic surface for an aircraft, comprising a torsion box, a movable control surface, and a central element, the torsion box comprising a rear spar, upper and lower covers, and the movable control surface comprising a leading edge, a front spar, a hinge line, a beam having a first end and a second end, and a counterweight attached to the second end of the beam. The first end of the beam is attached to the front spar, and the second end is projected beyond at least the hinge line so that the counterweight is arranged between the upper and lower covers extending from the rear spar of the torsion box towards the movable control surface.

Abstract: Electroerosion devices and methods for performing electroerosion machining are disclosed. The electroerosion devices may perform simultaneous electrical discharge machining and pulsed electrochemical machining (S-ED/PEC) through electrode assembly design and the use of two different working fluids.