74results about How to "Restrict propagation" patented technology

In a resistance value variable memory, substrate voltages and / or substrate biases of a digit line drive circuit, a word line drive circuit and a bit line drive circuit for a memory cell array are changed in accordance with an operation mode. A driving power on signal lines connected to memory cells can be increased, and a leakage current during standby can be reduced without increasing a circuit layout area.

Disclosed is a method of establishing a secured peer-to-peer communication between two communications devices, each communications device having stored a respective set of previously established security associations with other communications devices. The method comprises determining whether the two communications devices have a common security association in their respective sets of established security associations; if the devices have determined a common security association, protecting the communications link between the two communications device based on the determined common security association; otherwise establishing a new security association between the two communications devices, and protecting the communications link based on the new security association; and extending the sets of previously established security associations of the two communications devices to the corresponding other exchanging corresponding key data.

A scan test architecture is implemented. The scan test architecture provides a method of performing scan test of unbalanced scan chains. The scan test architecture generates a control signal (i.e., masking signal) to mask bits in an unbalanced scan chain. In one embodiment, the control signal is generated with a logic gate, a comparator, and a counter.

In the case of a method for connecting a fibre composite component to a structural component of an aircraft and spacecraft, a metal foil is provided as a transverse reinforcement element between the fibre composite component and the structural component. It is formed with at least one anchoring portion which protrudes from the surface facing the fibre composite component and is inserted between the fibre composite component and the structural component. A corresponding arrangement is produced in accordance with this method.

Semiconductor light emitting device and methods for its manufacture comprises a plurality of textured district defined on the surface of the substrate. The initial inclined layer deposition serves to guide the extended defects to designated gettering centers in the trench region where the defects combine with each other. As a result, the defect density in the upper section of the structure is much reduced. By incorporating a blocking mask in the structure, the free propagation of extended defects into the active layer is further restricted. The present invention is useful in the fabrication of semiconductor light emitting devices in misfit systems.

A nitride semiconductor is grown on a silicon substrate by depositing a few mono-layers of aluminum to protect the silicon substrate from ammonia used during the growth process, and then forming a nucleation layer from aluminum nitride and a buffer structure including multiple superlattices of AlRGa(1-R)N semiconductors having different compositions and an intermediate layer of GaN or other Ga-rich nitride semiconductor. The resulting structure has superior crystal quality. The silicon substrate used in epitaxial growth is removed before completion of the device so as to provide superior electrical properties in devices such as high-electron mobility transistors.

The present invention relates to a transmission optical fiber. The optical fiber includes, from its center to its periphery a central core, an intermediate cladding, and a depressed cladding. The optical fiber has an effective area (Seff) of at least about 120 μm2 at a wavelength of 1550 nm and an effective cutoff wavelength (λCeff) of less than 1600 nm. The optical fiber has an effective area of more than 120 μm2 with a cutoff wavelength limited to less than about 1600 nm without degradation of other optical parameters (e.g., attenuation losses and dispersion).

Fiber-reinforced separators / solid electrolytes suitable for use in a cell employing an anode comprising an alkali metal are disclosed. Such fiber-reinforced separators / solid electrolytes may be at least partially amorphous and prepared by compacting, at elevated temperatures, powders of an ion-conducting composition appropriate to the anode alkali metal. The separators / solid electrolytes may employ discrete high aspect ratio fibers and fiber mats or plate-like mineral particles to reinforce the separator solid electrolyte. The reinforcing fibers may be inorganic, such as silica-based glass, or organic, such as a thermoplastic. In the case of thermoplastic fiber-reinforced separators / solid electrolytes, any of a wide range of thermoplastic compositions may be selected provided the glass transition temperature of the polymer reinforcement composition is selected to be higher than the glass transition temperature of the amorphous portion of the separator / solid electrolyte.

The present invention provides structures and devices comprising conductive segments and conductance constricting segments of a nanowire, such as metallic, superconducting or semiconducting nanowire. The present invention provides structures and devices comprising conductive nanowire segments and conductance constricting nanowire segments having accurately selected phases including crystalline and amorphous states, compositions, morphologies and physical dimensions, including selected cross sectional dimensions, shapes and lengths along the length of a nanowire. Further, the present invention provides methods of processing nanowires capable of patterning a nanowire to form a plurality of conductance constricting segments having selected positions along the length of a nanowire, including conductance constricting segments having reduced cross sectional dimensions and conductance constricting segments comprising one or more insulating materials such as metal oxides.

The present invention relates to profiles for attaching rigid plates, especially photovoltaic modules, to a roof and to a method and system for attaching photovoltaic modules to a roof structure with the help of profiles.

A nitride semiconductor is grown on a silicon substrate by depositing a few mono-layers of aluminum to protect the silicon substrate from ammonia used during the growth process, and then forming a nucleation layer from aluminum nitride and a buffer structure including multiple superlattices of AlRGa(1-R)N semiconductors having different compositions and an intermediate layer of GaN or other Ga-rich nitride semiconductor. The resulting structure has superior crystal quality. The silicon substrate used in epitaxial growth is removed before completion of the device so as to provide superior electrical properties in devices such as high-electron mobility transistors.

A method for distributing keys for encrypted data transmission in a preferably wireless sensor network. Initially nodes store a subset of keys from a set of keys. A powerful sink node located in the centre of the wireless sensor triggers the key election procedure and sensor nodes choose from a locally broadcasted key-ID list one key to be stored on each node. All other initially stored keys are subsequently deleted. The process is iteratively until the edge of the network is achieved. Such key pre-distribution suits for the encryption of reverse multicast traffic to the sink node which is the pre-dominant traffic pattern in wireless sensor networks.

A film construction (330) includes a broad band reflective polarizing film (312) that may be immersed in an ultra low refractive index medium (332, 334). The reflecting polarizing film is characterized by a pass axis and a block axis, and its reflectivity for white light of the pass state polarization increases with increasing incidence angle to provide a compressed or narrowed viewing cone selectively in one plane of incidence. In some embodiments, the plane of incidence associated with the compressed viewing cone is aligned with the pass axis. In other embodiments it is aligned with the block axis.

An offset track forms a pattern perpendicular to the centerline of the track which enables tracks to be formed with even or odd number of metal inserts and thus accommodate virtually any tracked vehicle. The offset track uses variations in body thickness and lug width to provide a high performance offset track with improved ride, minimum vibration and longer wear. Use of full size and mini-inserts in a single track minimizes the weight and further enhances the performance of an offset track.

In a tomosynthetic image reconstruction method and diagnostic device operating with such a method, a tomosynthetic 3D x-ray image is reconstructed by a discrete filtered back projection from a number of individual digital projection data recorded from different project angles within a restricted angular range, in which at least one filtering is performed with a convolution kernel that, in the local area outside of its central value, corresponds to an exponential function.

A film construction (320) includes a broad band reflective polarizing film (312) that may be immersed in an ultra low refractive index medium (322, 324). The reflecting polarizing film is characterized by a pass axis and a block axis, and its reflectivity for white light of the pass state polarization increases with increasing incidence angle to provide a compressed or narrowed viewing cone in one or two planes.

An apparatus for and method of controlling propagation of decryption keys is provided. One embodiment of the present invention includes an encryption key propagation control system wherein a generation number is identified with each decryption key and the generation number is queried each time a request is made to forward the decryption key to another user. The generation number is decremented at each request, and once it reaches zero, further requests are refused by the control system.

A method and device for selective relaying in a communications network having a plurality of sources, a relay, and a destination. The method includes the following steps: the relay receives messages transmitted respectively by the sources in order to obtain an estimate of the messages; the relay detects errors in the estimated messages; the relay transmits a representative signal to the destination, the signal being representative of only those messages for which no error was detected and resulting from a non-bijective surjective function applied to the messages detected without error, the function including interleaving and encoding; and the representative signal being transmitted by the relay to the destination with a check signal indicating which messages are represented in the representative signal.

A magnetic pulse welding operation is performed to secure first and second metallic components together, such as a yoke and a driveshaft tube in a vehicular driveshaft assembly. The yoke includes a first portion, such as a body portion, and a second portion, such as a pair of opposed yoke arms, that are separated by a bridge portion. The end of the driveshaft tube is disposed co-axially about the body portion of the yoke, and a magnetic pulse welding operation is performed to secure the end of the driveshaft tube to the body portion of the yoke. The bridge portion can be defined by a groove formed in either the outer surface or the inner surface of the yoke. The groove may have side portions that extend either generally perpendicular or are angled or tapered relative to an axis of rotation of the yoke. If desired, a pair of opposed, semi-circular grooves may be formed in the yoke to define the bridge portion. The bridge portion allows the yoke arms to be elastically deformed and can also limit the propagation of shock waves through the yoke that can result from the performance of the magnetic pulse welding operation.

A system and method for feeding a composite fluid to a mold for casting a reinforced composite structure, such as a rotor blade for a wind turbine are provided. The system includes a first feeding unit for feeding a first flow of composite fluid to the mold through a first mold inlet, and a second feeding unit for feeding a second flow of composite fluid to the mold through a second mold inlet. The first flow of composite fluid and the second flow of composite fluid are individually controllable.

In a method for distributing keys for encrypted data transmission in a sensor network, nodes store a subset of keys from a set of keys. A sink node triggers the key election procedure and sensor nodes choose from a locally broadcasted keyID list, with one key to be stored on each node. All other initially stored keys are subsequently deleted. The process is repeated until the edge of the network is reached. Such key predistribution is suitable for the encryption of reverse multicast traffic to the sink node which is the predominant traffic pattern in wireless sensor networks.

Fiber-reinforced separators / solid electrolytes suitable for use in a cell employing an anode comprising an alkali metal are disclosed. Such fiber-reinforced separators / solid electrolytes may be at least partially amorphous and prepared by compacting, at elevated temperatures, powders of an ion-conducting composition appropriate to the anode alkali metal. The separators / solid electrolytes may employ discrete high aspect ratio fibers and fiber mats or plate-like mineral particles to reinforce the separator solid electrolyte. The reinforcing fibers may be inorganic, such as silica-based glass, or organic, such as a thermoplastic. In the case of thermoplastic fiber-reinforced separators / solid electrolytes, any of a wide range of thermoplastic compositions may be selected provided the glass transition temperature of the polymer reinforcement composition is selected to be higher than the glass transition temperature of the amorphous portion of the separator / solid electrolyte.

The invention relates to the separation of microparticles by means of a nozzle (12) for the release of a separating stream (20), comprising at least one enveloping fluid and microparticles entrained Therein, with a vibration generator (18), for the dispersion of the separation flow (20) into a droplet flow (20′), with a deflector device (24), for separation of the droplet flow (20′) into a through flow (20A) and at least one side flow (20B, 20C, . . . ), depending on signals from an analytical device (38). Said analytical device (38) is provided for the analysis of the microparticles(s) contained in the droplets and to control the deflector device (24). Also provided is a protective chamber for product and personnel protection, in which at least the nozzle (12), the oscillation generator (18) and the deflector device (24) are arranged. The analytical device is arranged essentially outside the microbiological safety cabinet (200), whereby, according to the invention, the protective chamber is part of a microbiological safety cabinet (MSW 200), in particular with a laminar throughflow, with a clean chamber (34) and with a monitoring device (22), provided in a side wall, in particular in the back wall (32) of the microbiological safety cabinet (200), through which the signals of the microparticles arising from the separating stream (20) are supplied to the detectors of the analytical device (38), arranged outside the microbiological safety cabinet (200).

A device and method for sorting microparticles including a nozzle for a separating stream, with a vibration generator for the dispersion of the separation flow into a droplet flow with a deflector device for separation of the droplet flow into a through flow and at least one side flow depending on signals from an analytical device configured to analyze the microparticles (s) contained in the droplets and to control the deflector device. Also provided is a protective chamber in which at least the nozzle, the oscillation generator and the deflector device are arranged. The analytical device is outside the safety cabinet wherein the protective chamber is part of the safety cabinet with a clean chamber and a monitoring device through which the signals of the microparticles arising from the separating stream are supplied to the detectors of the analytical device, arranged outside the safety cabinet.

The present invention relates to a housing, such as a transmission housing (103; 203), configured to control vibrations. A transmission housing (103) according to a first embodiment of the present invention has one or more vibration control panels (105) formed in a sidewall of the housing (103). The vibration control panel (105) is inset from a surrounding section of the sidewall (103). A transmission housing (203) according to a second embodiment of the present invention includes an elongate undulation (205) which forms a ridge and a corresponding groove in the transmission housing (203).

Electric motor (1) for an air blowing device, comprising a rotor (2), a stator (4), a support (12) for said rotor (2) and said stator (4) able to dissipate heat and a screening cap (26), characterized in that the screening cap (26) is fixed to the support (12) of said rotor (2) and of said stator (4) by a fixing means (28). The invention also relates to an air blowing device comprising such an electric motor (1).