Abstract: Piston mode Lamb wave resonators are disclosed. A piston mode Lamb wave resonator can include a piezoelectric layer, such as an aluminum nitride layer, and an interdigital transducer on the piezoelectric layer. The piston mode Lamb wave resonator has an active region and a border region, in which the border region has a velocity with a lower magnitude than a velocity of the active region. The border region can suppress a transverse mode.

Abstract: The present disclosure provides an audio compression device, an audio compressing system and an audio compression method. The audio compression device comprises a first transceiver and a first processor. The first transceiver is connected to the first processor. The processor obtains an audio signal and an available bandwidth, and the processor performs an audio compression encoding on the audio signal to obtain a sample audio signal, and then compares with the audio signal and the sample audio signal to generate a residual signal, and the residual signal is transmitted according to the available bandwidth. The audio signal can be completely transmitted to an audio decompression device to reduce the distortion of the audio signal.

Abstract: A portable medical spray includes a tubular body having a room defined therein, and a breakable portion is formed to the top end of the body. A connection portion extends from the bottom end of the body. A nozzle is connected to the top end of the body. The nozzle has a passage which is located corresponding to the breakable portion. A medicine cell is located in the room of the body and has medicine received therein. The medicine cell is a compressible bellow cell. A needle is located in the medicine cell. An end part is mounted to the connection portion. The end part is pushed toward the nozzle to compress the medicine cell, and the needle penetrates through the top end of the medicine cell and the breakable portion to release the medicine via the nozzle.

Abstract: A syringe assembly includes a main part with a bottom part and a top part. A compressible portion is connected to the top part, and a press unit is formed to the top the compressible portion. A needle is fixed to the top part and located within the compressible portion. The tip of the needle is located corresponding to a film of the press unit. The bottom part has a first lip and a second lip formed to the inner periphery thereof. The top part has a first groove and a second groove in the outer periphery thereof. Multiple collars are telescopically connected to each other, and are connected between the top part and the bottom part. The main part is located in the multiple collars. Each collar has two engaging portions which form two engaging grooves to be engaged with each other when collapsing the collars.

Abstract: A portable medical spray includes a tubular body, and a canister is located in the room. A needle is located in the room and a nozzle is formed to the top end of the body. The nozzle has a passage defined therethrough and the passage communicates with the room and the needle. A holding portion is formed to outside of the body. A connection portion extends from the bottom end of the body. The canister has medicine received therein and a breakable portion is formed to the top end of the canister and located corresponding to the needle. An end part is movable movably mounted to the connection portion. When a user pushes the end part to move the canister toward the needle, the needle penetrates through the breakable portion of the canister to release the medicine via the needle.

Abstract: A portable medical spray includes a tubular body having a room defined therein and a canister is located in the room. A needle is located in the room and a nozzle is formed to the top end of the body. The nozzle has a passage defined therethrough and the passage communicates with the room. The passage is located corresponding to the needle. A holding portion is formed to outside of the body. The canister has medicine received therein. A breakable portion is formed to the top end of the canister and located corresponding to the needle. The medicine is ejected through the passage of the nozzle when the canister is pushed and the needle penetrates through the breakable portion of the canister.

Abstract: A cast removing tool includes a handle having a battery received therein, and a switch is connected to the handle and electrically connected to the battery. A link is connected to the handle and a motor is connected to the link. The motor has an output shaft which protrudes beyond the link and is connected to a cutting tool. The cutting tool is activated by the motor. A protection member is a curved member and connected to the handle. The protection member extends to be located beneath the cutting tool. The protection member is inserted between the cast and the patient's limb so as to avoid the cutting tool to hurt the patient.

Abstract: A vaginal cleansing device is composed of an outer film, an inner support cylinder and a plug. The outer film has conical tapered rings formed on an outer wall of the outer film and tapered upward. The inner support cylinder has microvias formed on a wall of the inner support cylinder and corresponsive to the conical tapered rings of the outer film respectively; the inner support cylinder is plugged into the outer film, so that the microvias of the inner support cylinder are corresponsive to the conical tapered rings of the same height; and the microvias are attached onto the interior of the conical tapered rings. The plug is plugged into the opening of the inner support cylinder tightly and has a gas passing tube passing through the center of the opening of the inner support cylinder and a connector connected to the bottom end of the gas passing tube.

Abstract: An eyelash brush is disposed with a body provided with two clamping plate sets, a chamber and a screw connection portion, one end of the chamber is provided with a through hole, another end is provided with a plug-connection hole, a part of the body located between the clamping plate sets is disposed with a slot, a cover provided with an internal screw thread and a prod is assembled on the screw connection portion, a mascara liquid tube filled with a mascara liquid and provided with a perforation is disposed inside the chamber, a grip rod provided with an assembly end inserted into the perforation is assembled on the mascara liquid tube, a leak-proof gasket and a positioning stopper are provided on the grip rod, a liquid-absorbent cotton is disposed between the clamping plate sets, and a lower edge of the liquid-absorbent cotton is provided with bristles.

Abstract: A head massage device includes a head with a tubular member extending from the top thereof. A needle extends from the inner bottom of the tubular member. Multiple first bores are defined through the inner bottom of the tubular member. A handle is connected to the head and has a vibrator received therein which is controlled by a switch. A magnetic part is connected to the underside of the head and has protrusions extending from the underside thereof. Multiple holes are defined through the magnetic part, and each hole communicates with the passage of the protrusion located corresponding thereto. A guide member and a sponge are located between the guide member and the magnetic part. A container with liquid is inserted into the tubular member and the needle penetrates the bottom of the container so that the liquid flows toward the protrusions which massage the user's head.

Abstract: A syringe device includes a barrel and a compressible portion is connected to one end of the barrel. A positioning board is located between the barrel and the compressible portion. The positioning board has a hole defined therethrough. A seat is formed to the underside of the positioning board and has a recess and multiple guide grooves which communicate with the recess. A hold part is connected to the distal end of the compressible portion and has a penetrating face. Two flanges respectively extend diametrically from the hold part. A needle is connected to the positioning board and communicates with the recess. The tip of the needle is located within the compressible portion and beneath the penetrating face. By axially compressing the compressible portion and the barrel, the needle penetrates through the penetrating face and extends beyond the hole to eject medicine to the patient.

Abstract: In accordance with one aspect of the disclosure, an airfoil is disclosed. The airfoil may include a platform and a blade extending from the platform. The blade may have a root proximate the platform and a tip radially outward from the platform. The root may have a greater thickness than a cross-section at about a quarter-span of the blade or greater.

Abstract: A tampon includes a membrane, an inner absorber and a support tube. The membrane mounted to the inner absorber and the support tube. The inner absorber is located at the center of the tampon and peripherally wrapped by the inner portion of the membrane. The support tube is located between the outer portion and inner portion of the membrane. The cord connected to the membrane extends beyond the tampon. The membrane contacts the vaginal wall and provides comfort when using the tampon.

Abstract: The present disclosure relates to a semiconductor device. The semiconductor device includes a gate structure disposed on a semiconductor substrate, a sidewall spacer disposed on sidewalls of the gate structure, a lightly-doped source/drain region formed in the semiconductor substrate on opposite sides of the gate structure, a source/drain region formed in the semiconductor substrate on opposite sides of the sidewall spacer, a halo implant region formed in the semiconductor substrate below the gate structure and adjacent to the lightly-doped source/drain region, and a counter-doping region formed in the semiconductor substrate below the gate structure and between the lightly-doped source/drain region and the halo implant region. The dopant concentration of the counter-doping region is lower than the dopant concentration of the halo implant region.

Abstract: A double-layer medical fluid bag includes an inner wall, an outer wall, clean air filled between the inner and outer walls, and a piercing device installed between the inner and outer walls. When it is necessary to use a liquid medicine contained in the medical fluid bag, the piercing device is moved forward to pierce a plate to be pierced, so that the clean air can enter into the inner wall slowly to push the liquid medicine to flow downwardly to the outside. During the operation and use processes, the liquid medicine is completely isolated from outside air, so as to avoid the danger of having unknown outside air to enter into the medical fluid bag and endure the safety of using the medical fluid bag.

Abstract: A machining process includes providing a cutting tool having a rake face and a flank face; bringing the cutting tool into contact with a metal alloy work piece to form a chip by penetrating the cutting tool into the workpiece; and introducing a nanofluid into a vicinity of the penetration to remove heat and, in some instances, customize the finished surface. The nanofluid includes a mixture of a cryo-liquid and nanoparticles having a maximum size of approximately 0.1 nanometers to approximately 100 nanometers.

Abstract: A multilayer structure for deicing an aircraft airfoil component includes an electrically and thermally insulating bottom layer formed in a defined pattern directly on the aircraft airfoil component, an electrothermal middle layer of electrically resistant heater element arrays formed in the defined pattern on the electrically and thermally insulating bottom layer, and a thermally conductive and electrically insulating top layer encapsulating the electrically and thermally insulating bottom layer and the electrothermal middle layer of electrically resistant heater element arrays. The multilayer structure may be directly applied to the airfoil component by direct writing/additive manufacturing, and may be done with the assistance of a multi-axis robot.

Abstract: An elevator car (20) comprises: a cab (24) having a top, a bottom, a left side, a right side, a front, and a back, the front having a door (50); and a frame (22) supporting the cab. The cab comprises a perimeter shroud (120; 320; 420; 620) protruding above a surface of the top and leaving a well (130) exposing a central portion of an upper surface (60) of the top; the perimeter shroud protrudes above the upper surface; and the perimeter shroud has, in vertical section, a curved portion.

Abstract: The present disclosure relates to a semiconductor device. The semiconductor device includes a gate structure disposed on a semiconductor substrate, a sidewall spacer disposed on sidewalls of the gate structure, a lightly-doped source/drain region formed in the semiconductor substrate on opposite sides of the gate structure, a source/drain region formed in the semiconductor substrate on opposite sides of the sidewall spacer, a halo implant region formed in the semiconductor substrate below the gate structure and adjacent to the lightly-doped source/drain region, and a counter-doping region formed in the semiconductor substrate below the gate structure and between the lightly-doped source/drain region and the halo implant region. The dopant concentration of the counter-doping region is lower than the dopant concentration of the halo implant region.

Abstract: A machining process includes providing a cutting tool having a rake face and a flank face; bringing the cutting tool into contact with a metal alloy work piece to form a chip by penetrating the cutting tool into the workpiece; and introducing a nanofluid into a vicinity of the penetration to remove heat and, in some instances, customize the finished surface. The nanofluid includes a mixture of a cryo-liquid and nanoparticles having a maximum size of approximately 0.1 nanometers to approximately 100 nanometers.