Abstract:
The invention relates to an orthopaedic implant comprising a surface arranged to contact bone in a human or animal body. The surface of said implant comprises a polymeric material which includes a repeat unit of general formula The polymeric material is polyetheretherketone, and said surface is a plasma treated surface.
Abstract:
The invention discloses a handheld constant-stiffness ring shear apparatus which comprises a base and an annular rigid frame arranged on the base in a sleeved mode, wherein an upper cover is buckled to the top of the rigid frame, a pressure transmission plate is fixed to the upper portion of the upper cover, a rotary shaft is perpendicularly arranged in the center of the base, the rotary shaft penetrates through the pressure transmission plate and is fixed to the pressure transmission plate, a spanner is fixed to the top end of the rotary shaft, and a digital display instrument is embedded in the spanner. The handheld constant-stiffness ring shear apparatus is convenient to carry, easy to operate, economical and practical and is used for measuring the volume change of a soil sample at a field location under the constant-stiffness condition in the shear force resisting and shearing process.
Abstract:
The invention discloses a mechanical property tester and testing method of biological soft tissue. The tester comprises a base, a fixture for fixing the biological soft tissue, a transverse force applying device for applying a transverse force, a vertical force applying device for applying a vertical force, a longitudinal pulling force detector for detecting a longitudinal force, a displacement detecting unit for detecting the displacement of the fixture, an acquisition device and a computer. The transverse force applying device comprises a transverse pulling force detector for detecting the transverse force. The vertical force applying device comprises a vertical pulling force detector for detecting the vertical force. The acquisition device is used for collecting the longitudinal force, transverse force, vertical force and the displacement. The computer is connected with the acquisition device via signals to analyze the longitudinal force, transverse force, vertical force, and the displacement.
Abstract:
A concrete reinforcement assembly including a first hollow metal sleeve, an anchor bar that is nested concentrically within the first hollow metal sleeve, and a second hollow metal sleeve. The first hollow metal sleeve is nested concentrically within the second hollow metal sleeve and an infill material is disposed in between the first hollow metal sleeve and the anchor bar, and in between the first hollow metal sleeve and the second hollow metal sleeve. The infill material dampens energy transfer to and from the concrete reinforcement assembly when employed for structural stability in a concrete structure. A method for repairing a damaged concrete anchor with the concrete reinforcement assembly. A non-transitory computer readable medium having stored thereon a program that, when executed by a computer, causes the computer to execute a method of determining a cyclic response factor of a concrete reinforcement assembly in a concrete structure.
Abstract:
Disclosed is a method for demonstrating the capability of strengthening scalp and/or preventing dandruff of a personal care product or component thereof, the method comprising selecting a first portion of a solid porous article of non-animal origin, treating the first portion of the article with the personal care product or the component thereof, subjecting the treated first portion to a drying step and mechanically treating the dried first portion.
Abstract:
A simulated impact-type rock burst experiment apparatus includes a bracket, a specimen box assembly, an X-direction, Y-direction and Z-direction loading mechanisms mounted on the bracket, and control systems. Each loading mechanism includes four supporting posts in a rectangular arrangement, a first and second frames aligned with each other and fixedly connected to both ends of the four supporting posts, a loading hydraulic cylinder and a lead screw mounted on the two frames respectively.
Abstract:
A shearing force test device comprises a substrate mounted with an elastomer having a free end capable of moving toward or away from the substrate; the free end is connected with a test head; the elastomer is installed with two U-shaped elastic arms arranged at a distance and capable of mutually neutralizing horizontal position offsets; the free ends of the two U-shaped elastic arms are connected together; the test head is fixedly installed on the free end; the two U-shaped elastic arms are provided with the fixed end of the elastomer there between; the fixed ends of the two U-shaped elastic arms are connected together, and are fixedly connected with the substrate; and the other ends of the two U-shaped elastic arms away from the free ends are fixedly connected together via a connecting plate.
Abstract:
A rock specimen, including a rock body. The rock body includes: an upper part, an upper end face, a first circular groove, a first cylinder, a first circular body, a lower part, a lower end face, a second circular groove, a second cylinder, and a second circular body. The first circular groove is disposed on the upper end face of the rock body and has a circle center coinciding with a center of the upper end face. A method for testing pure shear of the rock specimen, includes: 1) disposing the rock specimen on a test bench of a rock mechanics testing system, allowing the end face of the second circular body to contact the test bench; and 2) operating the rock mechanics testing system, loading a pressure on the rock specimen via the end face of the first cylinder and the end face of the second circular body.
Abstract:
Shear force and pressure on a structure are simultaneously monitored using signals received from sensors with antennas on the structure. For example, sensors and systems for monitoring shear force and pressure have applications including ulcer prevention associated with structures including shoes, prosthetics, wheel-chairs, and beds of bed-bound patients.
Abstract:
This invention relates to hot film shear stress sensors and their fabrication. We describe a hot film shear stress sensor comprising a silicon substrate supporting a membrane having a cavity underneath, said membrane bearing a film of metal and having electrical contacts for heating said film, and wherein said membrane comprises a silicon oxide membrane, where in said metal comprises aluminium or tungsten, and wherein said membrane has a protective layer of a silicon-based material over said film of metal. In preferred embodiments the sensor is fabricated by a CMOS process and the metal comprises aluminium or tungsten.