Abstract: An artificial joint includes a first joint assembly and a second joint assembly. The first joint assembly is adapted to be connected to a first bone and has a first contacting surface, wherein the first contacting surface includes a first convex arc surface, a second convex arc surface, and a third convex arc surface. The second joint assembly is adapted to be connected to a second bone and has a second contacting surface, wherein the second contacting surface is in contact with the first contacting surface and includes a first concave arc surface, a second concave arc surface, and a third concave arc surface, and the first concave arc surface, the second concave arc surface, and the third concave arc surface respectively correspond to the first convex arc surface, the second convex arc surface, and the third convex arc surface.

Abstract: An artificial joint includes a first joint assembly and a second joint assembly. The first joint assembly is adapted to be connected to a first bone and has a first contacting surface, wherein the first contacting surface includes a first convex arc surface, a second convex arc surface, and a third convex arc surface. The second joint assembly is adapted to be connected to a second bone and has a second contacting surface, wherein the second contacting surface is in contact with the first contacting surface and includes a first concave arc surface, a second concave arc surface, and a third concave arc surface, and the first concave arc surface, the second concave arc surface, and the third concave arc surface respectively correspond to the first convex arc surface, the second convex arc surface, and the third convex arc surface.

Abstract: An adjustable vertebral spacer includes a spacer body, a movable member coupled to the spacer body, an adjustment ring mounted on the spacer body and rotatable to move the movable member and to further adjust the combined height of the spacer body and the movable member, a lock ring mounted on the spacer body for locking the movable member to the adjustment ring, and a top endplate coupled to the movable member at the top and tiltable to fit the angle of the adjacent upper vertebral body during surgery operation.

Abstract: A vertebral fixation plate assembly for insertion into the resection site between two vertebrae of a patients vertebral column and fixation to front or lateral side of the two adjacent vertebral bodies above and below the resection site by means of surgical implantation is disclosed to include a fixation plate that has a plurality of round holes and elongated holes and an opening on the middle, a plurality of bone screws respectively inserted through the round holes and elongated holes for fastening the fixation plate to the patient's vertebral column, and a cage affixed to the opening on the fixation plate and holding holes cut through the periphery for bone fusion and grow. The cage is linked to a vertebral spacer for artificial vertebrae by means of bone fusion to prevent vertebral sinking or slipping of the vertebral spacer and to improve bone fusion efficiency.

Abstract: A relay station, a base station, a power management method, and a computer readable medium thereof are provided. The relay station is located within the coverage area of the BS. The relay station comprises a receiving/transmission module and a determination module. The receiving/transmission module is configured to receive a BS beacon in a first period of time. The determination module is configured to allow the BS to transmit a data to the relay station according to the BS beacon, so that the receiving/transmission module transmits a power saving poll to the BS, receives a power saving poll ACK in the first period of time, and receives the data in a second period of time after the first period of time.

Abstract: An adjustable vertebral spacer includes a spacer body, a movable member coupled to the spacer body, an adjustment ring mounted on the spacer body and rotatable to move the movable member and to further adjust the combined height of the spacer body and the movable member, a lock ring mounted on the spacer body for locking the movable member to the adjustment ring, and a top endplate coupled to the movable member at the top and tiltable to fit the angle of the adjacent upper vertebral body during surgery operation.

Abstract: An adjustable vertebral spacer includes a spacer body, a movable member coupled to the spacer body, an adjustment ring mounted on the spacer body and rotatable to move the movable member and to further adjust the combined height of the spacer body and the movable member, a lock ring mounted on the spacer body for locking the movable member to the adjustment ring, and a top endplate coupled to the movable member at the top and tiltable to fit the angle of the adjacent upper vertebral body during surgery operation.

Abstract: Power management methods and systems for a first station and a second station in an ad-hoc network. Each station enters the normal beacon interval (NBI) every certain number of beacon intervals (BIs) for data transmission, a Listen Interval (LI). When a station switches to a power-saving mode, it first determines the number of “beacon-window-only beacon intervals (BBIs)” within a LI. In addition, each station broadcasts a beacon frame comprising at least information about “the remaining number of BIs (RBI)” within a beacon window. Once the first station correctly receives the beacon frame from the second station, the first station predicts the NBI of the second station according to the RBI. At the NBI of the second station, the first station transmits data frames to the second station.

Abstract: A relay station, a base station, a power management method, and a computer readable medium thereof are provided. The relay station is located within the coverage area of the BS. The relay station comprises a receiving/transmission module and a determination module. The receiving/transmission module is configured to receive a BS beacon in a first period of time. The determination module is configured to allow the BS to transmit a data to the relay station according to the BS beacon, so that the receiving/transmission module transmits a power saving poll to the BS, receives a power saving poll ACK in the first period of time, and receives the data in a second period of time after the first period of time.

Abstract: A vertebral fixation plate assembly for insertion into the resection site between two vertebrae of a patients vertebral column and fixation to front or lateral side of the two adjacent vertebral bodies above and below the resection site by means of surgical implantation is disclosed to include a fixation plate that has a plurality of round holes and elongated holes and an opening on the middle, a plurality of bone screws respectively inserted through the round holes and elongated holes for fastening the fixation plate to the patient's vertebral column, and a cage affixed to the opening on the fixation plate and holding holes cut through the periphery for bone fusion and grow. The cage is linked to a vertebral spacer for artificial vertebrae by means of bone fusion to prevent vertebral sinking or slipping of the vertebral spacer and to improve bone fusion efficiency.

Abstract: An adjustable vertebral spacer includes a spacer body, a movable member coupled to the spacer body, an adjustment ring mounted on the spacer body and rotatable to move the movable member and to further adjust the combined height of the spacer body and the movable member, a lock ring mounted on the spacer body for locking the movable member to the adjustment ring, and a top endplate coupled to the movable member at the top and tiltable to fit the angle of the adjacent upper vertebral body during surgery operation.

Abstract: Power management methods and systems for a first station and a second station in an ad-hoc network. Each station enters the normal beacon interval (NBI) every certain number of beacon intervals (BIs) for data transmission, a Listen Interval (LI). When a station switches to a power-saving mode, it first determines the number of “beacon-window-only beacon intervals (BBIs)” within a LI. In addition, each station broadcasts a beacon frame comprising at least information about “the remaining number of BIs (RBI)” within a beacon window. Once the first station correctly receives the beacon frame from the second station, the first station predicts the NBI of the second station according to the RBI. At the NBI of the second station, the first station transmits data frames to the second station.