Abstract: Methods, systems, and computer program products for direct assignment of physical devices to confidential virtual machines (VMs). At a first guest privilege context of a guest partition, a direct assignment of a physical device associated with a host computer system to the guest partition is identified. The guest partition includes the first guest privilege context and a second guest privilege context, which is restricted from accessing memory associated with the first guest privilege context. The guest partition corresponds to a confidential VM, such that a memory region associated with the guest partition is inaccessible to a host operating system. It is determined, based on a policy, that the physical device is allowed to be directly assigned to the guest partition. Communication between the physical device and the second guest privilege context is permitted, such as by exposing the physical device on a virtual bus and/or forwarding an interrupt.

Abstract: A temperature sensor, capable of operating in electromagnetic and/or electric environments such as electrical generators, motors and transformers and/or in environments where vibratory conditions are frequent or continuous, contains at least one light emitting optic fiber and one light receiving optic fiber and an electrically non-conductive dilatable object which variably occults the emitted light as the object's temperature varies. The light receiving optic fiber transmits light intensity and light intensity changes to an electronic device that may include a photometer and light-to-temperature computing equipment.

Abstract: A wireless breakage indicator for a shear pin having an axial bore. The indicator (10) comprises a stem (20) having a head (22) and a foot (24) at opposite ends thereof; a sleeve (32) around a portion of the stem between a first (28) and second (30) axial positions, the stem (20) and sleeve (32) adapted to be broken by the shear pin (12) in the event of its breakage; a spring (26) compressed between the head (22) of the stem (20) and a first end (34) of the sleeve (32); the foot (24) of the stem (20) being retained to the second end (36) of the sleeve (32). The breakage of the stem (20) frees the head (22) to be displaced by the spring (26) and indicate breakage of the shear pin (12). The indication can be direct, by visual inspection of the displaced head, or indirect by the displacement of the head activating a transmitter.

Abstract: A method for non-intrusive determination of an internal temperature of a given area of an electrical machine stator, comprises obtaining a temperature gradient between an internal wall of the stator and an external wall of the stator, obtaining temperature measurements at locations on the external wall of the stator, and using the temperature gradient and the external temperature measurements to extrapolate corresponding internal temperatures of the stator.

Abstract: A temperature sensor, capable of operating in electromagnetic and/or electric environments such as electrical generators, motors and transformers and/or in environments where vibratory conditions are frequent or continuous, contains at least one light emitting optic fiber and one light receiving optic fiber and an electrically non-conductive dilatable object which variably occults the emitted light as the object's temperature varies. The light receiving optic fiber transmits light intensity and light intensity changes to an electronic device that may include a photometer and light-to-temperature computing equipment.

Abstract: A wireless breakage indicator for a shear pin having an axial bore. The indicator (10) comprises a stem (20) having a head (22) and a foot (24) at opposite ends thereof; a sleeve (32) around a portion of the stem between a first (28) and second (30) axial positions, the stem (20) and sleeve (32) adapted to be broken by the shear pin (12) in the event of its breakage; a spring (26) compressed between the head (22) of the stem (20) and a first end (34) of the sleeve (32); the foot (24) of the stem (20) being retained to the second end (36) of the sleeve (32). The breakage of the stem (20) frees the head (22) to be displaced by the spring (26) and indicate breakage of the shear pin (12). The indication can be direct, by visual inspection of the displaced head, or indirect by the displacement of the head activating a transmitter.

Abstract: A method for non-intrusive determination of an internal temperature of a given area of an electrical machine stator, comprises obtaining a temperature gradient between an internal wall of the stator and an external wall of the stator, obtaining temperature measurements at locations on the external wall of the stator, and using the temperature gradient and the external temperature measurements to extrapolate corresponding internal temperatures of the stator.

Abstract: An optical acceleration sensor includes a target having a reflective portion and a non-reflective portion. A conveyor causes light to be irradiated on the target. A receiver receives light from the target. An inertial mass is coupled to at least one of the conveyor and the receiver, wherein movement of the inertial mass relative to the target causes a change in intensity of an amount of light impinging on the portions to change an amount of light received at the receiver. The conveyor and the receiver may be optical fibers and may be disposed at least partially in an opaque conduit and held substantially parallel in a sensor head.

Abstract: A non intrusive method and system for the dynamic measurement of a distance, or the variations over time thereof, constituting the thickness, or the variations thereof, of a thin compressible dielectric material located between one or several other closely spaced solid dielectric layers of constant thickness and a conductive or semi-conductive surface. This is achieved by positioning a capacitive sensor on the external layer of the dielectric material, the sensor being composed of two parallel plates electrically insulated from one another, feeding the first plate with a high frequency signal, measuring the voltage and current value over time generated by the high frequency signal between the plate of the sensor which is closest to the surface of the outer layer of dielectric material, and deducting the above distance or variations thereof.

Abstract: A non intrusive method and system for the dynamic measurement of a distance, or the variations over time thereof, constituting the thickness, or the variations thereof, of a thin compressible dielectric material located between one or several other closely spaced solid dielectric layers of constant thickness and a conductive or semi-conductive surface. This is achieved by positioning a capacitive sensor on the external layer of the dielectric material, the sensor being composed of two parallel plates electrically insulated from one another, feeding the first plate with a high frequency signal, measuring the voltage and current value over time generated by the high frequency signal between the plate of the sensor which is closest to the surface of the outer layer of dielectric material, and deducting the above distance or variations thereof.

Abstract: The circuit and the method are for measuring a capacitance of a capacitive sensor. According to the method, a charging circuit charges the capacitive sensor with a voltage and a discharging circuit discharges the capacitive sensor. A trigger circuit triggers the charging circuit and the discharging circuit in alternation into play as a potential of the capacitive sensor drops and rises to predetermined lower and upper levels respectively. An output circuit provides a signal having a low level during operation of one of the charging and discharging circuit and a high level during operation of the other one of the charging and discharging circuit. The signal has a period defined by a same level repetition which is indicative of the capacitance of the capacitive sensor.