Abstract: Acoustic filters, resonators and methods are disclosed. An acoustic filter device includes a substrate having a surface and a single-crystal piezoelectric plate having front and back surfaces, the back surface attached to the surface of the substrate except for a portion of the piezoelectric plate forming a diaphragm that spans a cavity in the substrate. An interdigital transducer is formed on the front surface of the piezoelectric plate with interleaved fingers of the IDT disposed on the diaphragm. At least a portion of a perimeter of the cavity is curved and at least one end zone of the perimeter of the cavity is round.

Abstract: This disclosure describes devices, systems, and methods related to therapeutic ultrasound. An exemplary system includes a transducer configured to emit therapy ultrasound waves towards a therapy site and an ultrasound imaging device configured to emit plane wave ultrasound waves towards the therapy site. The system further includes a controller coupled to the transducer and the ultrasound imaging device. The controller is configured to send an activation signal to the transducer and send an activation signal to the ultrasound imaging device. The controller is further configured to receive image data from the ultrasound imaging device and generate bubble cloud image data based on the received image data.

Abstract: Filter devices are disclosed. A filter device includes a piezoelectric plate comprising a supported portion, a first diaphragm, and a second diaphragm. The supported portion is attached to a substrate and the first and second diaphragms spans respective cavities in the substrate. A first interdigital transducer (IDT) has interleaved fingers on the first diaphragm. A second interdigital transducer (IDT) has interleaved fingers on the second diaphragm. A first dielectric layer is between the interleaved fingers of the first IDT, and a second dielectric layer is between the interleaved fingers of the second IDT. A thickness of the first dielectric layer is greater than a thickness of the second dielectric layer. The piezoelectric plate and the first and second IDTs are configured such that radio frequency signals applied to first and second IDTs excite primary shear acoustic modes in the respective diaphragms.

Abstract: Providing access to content is disclosed. An indication of a context is received. Access is provided to a context-relevant subset of a body of managed content. In some cases, the context-relevant subset includes a document relevant to the content.

Abstract: An acoustic resonator is provided that includes a piezoelectric plate and an interdigital transducer (IDT) including interleaved fingers on the piezoelectric plate. The piezoelectric plate and the IDT are configured such that a radio frequency signal applied to the IDT excites a shear primary acoustic mode within the piezoelectric plate. The acoustic resonator further includes a front-side dielectric layer on the piezoelectric plate between the fingers of the IDT, wherein a resonance frequency of the acoustic resonator device has an inverse dependence on a thickness of the front-side dielectric layer.

Abstract: Acoustic resonators and filter devices. An acoustic resonator includes a piezoelectric plate having front and back surfaces, a portion of the piezoelectric plate forming a diaphragm, and a conductor pattern on the front surface, the conductor pattern including an interdigital transducer (IDT), fingers of the IDT on the diaphragm. A thickness of the interleaved fingers is greater than or equal to 0.85 times a thickness of the piezoelectric plate and less than or equal to 2.5 times the thickness of the piezoelectric plate. The IDT comprises a first portion having a first pitch and a first mark and a second portion having a second pitch and a second mark not equal to the first pitch and first mark.

Abstract: Resonator devices are disclosed. An acoustic resonator device includes a piezoelectric plate having front and back surfaces, an acoustic Bragg reflector on the back surface, and an interdigital transducer (IDT) on the front surface. The acoustic Bragg reflector reflects a primary shear acoustic mode excited by the IDT in the piezoelectric plate over a frequency range including a resonance frequency and an anti-resonance frequency of the acoustic resonator device.

Abstract: Acoustic resonator devices and filters, and methods of making the same. An acoustic resonator includes a piezoelectric plate and an interdigital transducer (IDT) including interleaved fingers on the piezoelectric plate. The piezoelectric plate and the IDT are configured such that a radio frequency signal applied to the IDT excites a shear primary acoustic mode within the piezoelectric plate. The acoustic resonator further includes a front-side dielectric layer on the piezoelectric plate between the fingers of the IDT, wherein a resonance frequency of the acoustic resonator device has an inverse dependence on a thickness of the front-side dielectric layer.

Abstract: A pelletizing device comprising a rotary drivable at least partly cylindrical die, wherein the cylindrical part comprises a multitude of radial openings for making of pellets and at least one roller rotatable around a stationary shaft, for pressing of material to be pelletized through the radial openings in the die, wherein the roller is mounted to the corresponding stationary shaft by means of at least one roller bearing and wherein the pelletizing device comprises an oil circulation system for lubricating each of the roller bearings of each of the rollers with oil.

Abstract: A pelletizing device comprising a rotary drivable at least partly cylindrical die, wherein the cylindrical part comprises a multitude of radial openings for forming of pellets and at least one roller rotatable around a stationary shaft, for pressing of material to be pelletized through the radial openings in the die, wherein the roller is mounted to the corresponding stationary shaft by means of at least one roller bearing and wherein the pelletizing device comprises an oil circulation system for lubricating each of the roller bearings of each of the rollers with oil.

Abstract: The oscillatory dynamics of inferior olive (IO) neurons found in the olivo-cerebellar network of the brain are reproduced and applied to various control applications. An IO neuron model is provided which produces quasi-sinusoidal oscillations with a characteristic amplitude and frequency. Action potentials occur at the peaks of the oscillations and have precise timing properties. Stimuli applied to the IO neuron model show no changes in oscillation amplitude and frequency but do produce a shift of the oscillation phase, and hence a time shift of the corresponding action potentials. The resulting phase is defined by the strength of the stimulus and does not depend on when the stimulus is applied, thus providing a self-referential phase reset (SPR) effect. The oscillations of multiple IO neurons, or their models, coupled together tend to become organized in space and time in the form of oscillatory phase clusters.

Abstract: A control system and method base on a model of a neurological structure such as the inferior olive of the brain. In one embodiment, individual inferior olive neurons are modeled in hardware, such as in an integrated circuit, and interconnected to form an artificial inferior olive. The artificial inferior olive thus formed can be used in a universal movement control system. An exemplary system for controlling the operation of a six-legged walker is described. The degree of coupling between neurons can be varied. A model is also provided which mimics the interaction between neurons of the inferior olive, the cerebellar nuclei and Purkinje cells via collateral axons. The model accurately describes the qualitative dynamics of cluster formation and spike-train generation in the olivo-cerebellar system. A universal control system (UCS) based on the olivo-cerebellar system is described.

Abstract: The present disclosure relates to increasing the external efficiency of light emitting diodes, and specifically to increasing the outcoupling of light from an organic light emitting diode utilizing a diffraction grating.

Abstract: The present disclosure relates to increasing the external efficiency of light emitting diodes, and specifically to increasing the outcoupling of light from an organic light emitting diode utilizing a diffraction grating.

Abstract: An optical system including: a substrate having a recess; and, a substantially planar, semiconductor waveguiding membrane suspended over the recess and having a thickness less than about 200 nm; wherein, the optical system supports a propagating optical mode having a majority of its energy external to the semiconductor waveguiding membrane.

Abstract: A control system and method base on a model of a neurological structure such as the inferior olive of the brain. In one embodiment, individual inferior olive neurons are modeled in hardware, such as in an integrated circuit, and interconnected to form an artificial inferior olive. The artificial inferior olive thus formed can be used in a universal movement control system. An exemplary system for controlling the operation of a six-legged walker is described. The degree of coupling between neurons can be varied. A model is also provided which mimics the interaction between neurons of the inferior olive, the cerebellar nuclei and Purkinje cells via collateral axons. The model accurately describes the qualitative dynamics of cluster formation and spike-train generation in the olivo-cerebellar system. A universal control system (UCS) based on the olivo-cerebellar system is described.

Abstract: Novel platinum(II) carboxylatocomplexes of the following general formula: ##STR1## wherein R is tetrahydrofurfuryl or cyclo-C.sub.n R".sub.2n-1, R" is H, an alkyl, hydroxyl, n=3-6; R' is --CH.sub.2 --, --CH.sub.2 --CH.sub.2 --, --CH(OH)--, --CH(OH)--CH.sub.2 --, --CH(OH)--CH(OH)--.These compounds possess a clearly pronounced antitumor activity and are readily soluble in water.A process for preparing these compounds comprises reacting K [PtCl.sub.3 NH.sub.3 ] with KI, followed by treatment of the reaction mixture with tetrahydrofurfurylamine or an alicyclic amine and treatment of the resulting mixture of complexes with a silver salt of the formula: Ag.sub.2 (OOC--R'--COO), wherein R' is as identified above.

Abstract: The semiconductor light emitter comprises a substrate (I) from a single-crystalline material transparent within the visible range of spectrum. Onto the substrate (I) there are deposited: a layer (2) of gallium nitride of the n-type conductivity and, above it, a layer (3) of gallium nitride alloyed with acceptor dopes. The emitter also comprises two metallic electrodes (5) and (6). Onto the electrode (5) a negative-polarity voltage is applied, onto the electrode (6)--a positive-polarity voltage. According to the present invention, over the layer (3) of gallium nitride alloyed with acceptor dopes a layer (4) of an insulating material is formed. The process for manufacturing the semiconductor light emitter comprises epitaxially growing, on a substrate of a single-crystalline material transparent within the visible range of spectrum, a layer of gallium nitride of the n-type conductivity; epitaxially growing, on this layer, a layer of gallium nitride alloyed by acceptor dopes, and forming two electrodes.

Abstract: A tool for the formation of holes without extracting the soil comprises a body having a cylindrical calibrating portion, coaxial portions with surfaces for the compaction of the soil and radii decreasing stepwise in the direction away from the calibrating portion, and terminating in an end piece. The body has also transition portions with surfaces for the compaction of the soil, forming a smooth transition from a coaxial portion with a larger radius to an adjacent coaxial portion with a smaller radius. The surface for the compaction of the soil of each coaxial portion is a conical surface having the configuration of a ribbon wound from the calibrating portion to the end piece and comprising the transition portions.