Abstract: A method for vascular regeneration comprises delivering endothelial cells to a lung scaffold, delivering perivascular cells to the lung scaffold, and providing a multiphase culture program to the scaffold. The multiphase culture program comprises a first phase including delivering an angiogenic medium, e.g., having 40-100 ng/ml of pro-angiogenic factors, and a second phase including delivering a stabilization medium, e.g., having 0.5-2% of serum and 1-20 ng/ml of angiogenic factors.

Abstract: This invention discloses a percussion toggle device of a percussion driller. It includes bottom ratchet wheel that joggles the top ratchet wheel fixed in the output main shaft of the percussion driller, the locking ring used to lock the rotating direction of bottom ratchet wheel, the ejector rod to eject the locking ring, the slide rod that works with ejector rod to make it rise or fall, the percussion button connecting the slide rod, the positioning device to fixate the position of slide rod, and the reset device that works with the positioning device to remove the position limitation by the positioning device. This invention locks the rotating direction of bottom ratchet wheel through the independent percussion button, slide rod and ejector rod. In this way, the percussion toggle and the adjustment of torque force of the percussion driller can be separated. When using the percussion button, the user can toggle their operation between percussion and torque force.

Abstract: A lift kit assembly is attached to a piece of portable equipment, such as a generator, so that the equipment may be hoisted or suspended by a crane. The lift kit assembly, which includes a lift ring and one or more piston assemblies, may be rotated from an upright position, suitable for lifting the portable equipment, to a flush position, suitable for storing or using the equipment. The piston assemblies have a spring constant that urges the lift ring into an upright position, which position may be released by application of a downward force to the lift ring.

Abstract: This invention discloses a percussion toggle device of a percussion driller. It includes bottom ratchet wheel that joggles the top ratchet wheel fixed in the output main shaft of the percussion driller, the locking ring used to lock the rotating direction of bottom ratchet wheel, the ejector rod to eject the locking ring, the slide rod that works with ejector rod to make it rise or fall, the percussion button connecting the slide rod, the positioning device to fixate the position of slide rod, and the reset device that works with the positioning device to remove the position limitation by the positioning device. This invention locks the rotating direction of bottom ratchet wheel through the independent percussion button, slide rod and ejector rod. In this way, the percussion toggle and the adjustment of torque force of the percussion driller can be separated. When using the percussion button, the user can toggle their operation between percussion and torque force.

Abstract: An improved arbitration technique for a computer network system in which multiple nodes communicate using a shared bus, and at least one node has no knowledge of the current status of the arbitration taking place between all nodes in the system. Such a node is called a "deaf node". Each node in the system is assigned an initial arbitration count number, for example, N+1, where N is the node number assigned to the node. The arbitration count number is the number of quiet slots a node must count before trying to transmit on the system bus. The length of a quiet slot is determined by a particular system's electrical characteristics. One quiet slot is reserved as the "deaf node quiet slot", during which a deaf node may transmit. In response to a transmission occurring in the deaf node quiet slot, each node in the system reinitializes its arbitration count number to its initial arbitration count number.

Abstract: An improved arbitration technique for a computer network system in which multiple nodes communicate using a shared bus. Each node in the system is assigned an initial arbitration number, N+1, where N is the node number assigned to the node. The arbitration number is the number of quiet slots a node must count before trying to transmit on the system bus. The length of a quiet slot is determined by a particular system's electrical characteristics. Each node in the system monitors a carrier signal on the system bus, the presence of which indicates that a node is transmitting on the bus. Upon detecting the absence of the carrier signal, each node in the system begins to count quiet slots. Every time a node counts an additional quiet slot, it checks to see if the count matches its arbitration number. If the two values are equal, the node checks to see if it has a transmit request, and begins to transmit a message on the system bus if a transmit request is present.