Abstract: A composite blade (26) comprises a three-dimensional arrangement of reinforcing fibres (58) and a matrix material (60) infiltrated around the three-dimensional arrangement of woven reinforcing fibres (60). The three-dimensional arrangement of woven reinforcing fibres (58) defines a plurality of cavities (56) within the aerofoil (28). The composite blade (26) comprises an aerofoil portion (38) and a root portion (36). The aerofoil portion (38) comprises a leading edge (44), a trailing edge (46), a concave pressure surface wall (50), a convex suction surface wall (52) and a tip (48). The aerofoil portion (36) comprises a plurality of webs (54) extending between, and being secured to, the concave pressure surface wall (50) and the convex suction surface wall (52) to produce a Warren girder structure. The three-dimensional arrangement of woven reinforcing fibres (58) are arranged to produce the concave pressure surface wall (50), the convex suction surface wall (52) and the plurality of webs (54).

Abstract: Aerofoils (22) of a gas turbine engine are provided with a coating (34) or filler (44) of viscoelastic material. As ice accretes on the aerofoils (22) during operation, the resulting aerodynamic stability imbalance induces vibration in the aerofoils (22). The viscoelastic material (34, 44) damps this vibration, and in so doing generates heat, which melts the ice away from the aerofoils (22). Heat-conducting members conduct the heat to regions of the component in which ice accretion is to be prevented. Alternative embodiments are described in which the pseudoelastic behaviour of a shape memory alloy (56), or eddy currents arising from the rotor blades' rotation in an axisymmetric magnetic field, are used as sources of heat.

Abstract: A process for producing a substituted aminoquinazolinone derivative of formula (I), characterized by reducing a substituted iminoquinazolinone derivative of formula (II) with hydrogen in the presence of a catalyst and either of a halogen compound and a sulfur compound; a substituted iminoquinazolinone derivative of formula (II?); and a pest control agent containing the derivative of formula (II?) or a salt thereof as an active ingredient and a method of using the same (in the formulae, R represents hydrogen, formyl, (C1-C6) alkyl, (C1-C6)alkoxy(C1-C3)alkyl, (C1-C6) alkylsulfonyl, optionally substituted phenylcarbonyl, etc.; R1 represents an optionally substituted, 5- or 6-membered heterocycle having one to three heteroatoms selected among oxygen, sulfur, and nitrogen; R2 represents hydrogen or (C1-C3) alkyl; X and X? may be the same or different and each represents (C1-C6) haloalkyl, (C1-C6) haloalkoxy, etc.; n is an integer of 0; and n? is an integer of 1-4).

Abstract: The present invention relates to a method in connection with SCUBA diving to control a diver's buoyancy, in which method the diver (11) is equipped with diving equipment comprising at least one air pressure tank (1), a valve device (2) connected to the pressure tank (1) and arranged to supply air from said pressure tank via first supply means (5) to a breathing regulator (4) and via second supply means (7) to an inflatable diving jacket (6) in order to control the diver's buoyancy, inflation of the diving jacket being initiated when the diver has not affected the air flow through the breathing regulator (4) for a certain time period. The invention also relates to a safety device and diving equipment.

Abstract: The invention concerns a method for producing ultrafine suspensions, characterized in that a substance in the form of a solid product at 20° C. is dissolved in a solvent, in that the solvent is very rapidly substantially drawn from said solution, in that the powder thus obtained, whereof the particles have an average particle-size distribution of the order of 1 to 50 ?m (by laser diffractometry) is dispersed in a dispersing medium, and in that the resulting suspension is treated subsequently, using average to high forces, so as to obtain a suspension whereof the solid matter particles have a average particle-size distribution (by photon correlation spectroscopy) less than 3 ?m, preferably less than 1 ?m (1000 nm), and in particular less than 400 nm, more particularly still, less than 200 nm.

Abstract: The invention relates to a wall element for a wall structure of a gas turbine engine combustor. The wall element has an inner, in use, hot surface, and an outer, in use, cooler surface. A plurality of projections is provided on the outer surface to facilitate heat transfer to a coolant flow. The wall element comprises a means to direct more coolant flow at a hot-spot on an adjacent tile than the remainder of the adjacent tile and thereby reducing the thermal gradient across the adjacent tile.

Abstract: A process for producing a solid dispersion comprising a resin and a functional compound dispersed therein, which comprises: kneading a powdery functional compound together with deionized water while gradually introducing the deionized water; adding a resin and, according to need, an additive to the mixture; subsequently heating and kneading the resultant mixture in a vessel which has an atmosphere causing the resin to soften at a temperature not higher than the boiling point of the deionized water and which has been tightly closed according to need so as to function like a pressure cooker to thereby disperse the functional compound into the softened resin; and kneading the resultant dispersion with heating at ordinary pressure or a reduced pressure to remove the water by vaporization.

Abstract: The present invention relates to a harmful material remediating agent comprising a metal oxide and a reducing material, and it can remediate environmental pollutants such as harmful organic compounds and nitrate or nitrite nitrogen-containing compounds efficiently and at low cost.

Abstract: The invention specifies a circuit arrangement (1, 20) for controlling a brushless electric motor (37) with a control chip (2), particularly a microcontroller, which has a number of PWM contacts (8), which can be used to output a PWM signal, and a number of commutation contacts (5,5?, 6,6?, 7,7?), which can be used to output a commutation signal. In this case, provision is made for at least one commutation contact (5,5?, 6,6?, 7,7?) to be alternately controllable as an input and an output, for the at least one commutation contact (5,5?, 6,6?, 7,7?) to have its output electrically connected to a PWM contact (8), and for the commutation contact (5,5?, 6,6?, 7,7?) connected in this manner to be able to be contacted for the purpose of tapping off a control signal. Such a circuit arrangement (1,20) increases the control options for a given control chip (2). The number of PWM sources required is reduced.

Abstract: The invention relates to a method carried out with simple means for determining the position of the rotor in a sensorless and brushless multi-phase electric motor (1) in addition to a device particularly suitable for carrying out said method. According to said method, a phase voltage (Uv) on the clamping side on said motor phase is to be detected after clamping a first motor phase (V) from the reference potentials (UZ,M) of an intermediate circuit (7) during a detection period (TE), via which the detection period (TE) determines a peak value (Uv*) of the detected phase voltage (Uv), the peak values (Uv*) are to be compared to the comparative value (Uc), and a positon signal (SP) is to be produced when the peak value (Uv*) exceeds the comparative value (U0).

Abstract: A Compressed Air Energy Storage (CAES) system includes a first combustion turbine assembly (42) having a shaft (52) coupled to a motor (54), a compressor (44) and a debladed turbine element (46). A second combustion turbine assembly (68) has a shaft (74) coupled to an electrical generator (80), a turbine (70) and a debladed compressor (72). A first interconnection (58) is from an output of the compressor (44) of the first combustion turbine assembly to an air storage (66). A second interconnection (87) is from the air storage to the turbine (70) of the second combustion turbine assembly for producing power. An expander (88) and an electrical generator (94) are provided. A third interconnection (90) is from the air storage (66) to the expander (88). A source of heat preheats compressed air in the third interconnection. A fourth interconnection (96) is from the expander to the turbine (70).

Abstract: A gas feed assembly (30) comprises a compressor arrangement (32) comprising first and second compressor (34, 36). The gas feed assembly includes an outlet (42) for gas for the first and second compressors (34, 36). The gas feed assembly includes a first inlet (38) for the first compressor (34) and a second inlet (40) for the second compressor (36). The gas feed assembly further includes a valve assembly (52, 64) for allowing gas to enter either, or both, of the first and second compressors from at least one gas source.

Abstract: A method of replacing a damaged blade (12A) of an integrally bladed rotor assembly (10) including a disc (14) and a plurality of blades (12) extending outwardly from the disc (14) includes the steps of; removing the damaged blade (12A) to leave a blade stub (16) projecting from the disc (14); depositing a collar (22) of metal around the blade stub (16) at a position physically separated from the disc (14); attaching a replacement blade (12B) to the stub (16) by linear friction welding; and removing the collar (22). A body (20) of a material may be deposited between the disc (14) and the collar (22) to protect the disc (14) from damage.

Abstract: The invention relates to a method and apparatus for filtering contaminated water from an oil or gas well.

Abstract: An apparatus (60) for applying a dry film lubricant comprises a tool (62) and a pad (64). The tool (62) includes a handle (66), a cranked member (68) and a supporting member (70). The pad (64) is removably locatable on the supporting member (70). The supporting member (70) is oval in cross-section and the pad (64) includes an oval cross-section hollow member removably locatable on the supporting member (70). The supporting member (70) comprises locking means (78) to lock the pad (64) on the supporting member (70). The supporting member (70) comprises positioning means (80) to position the pad (64) on the supporting member (70). The tool (62) also has a shielding member (72) spaced from and arranged parallel to the supporting member (70). The handle (66) is arranged in a plane (A) substantially parallel to a plane (B) containing the supporting member (70) and to a plane (C) containing the shielding member (72). The pad (64) is substantially dovetail shape in cross-section to correspond to a rotor slot (40).