Abstract: The present disclosure provides a method for preparing a composition including mesenchymal stem cells, extracellular vesicles produced by the mesenchymal stem cells, and growth factors, the composition prepared by the method, and use of the composition for treating arthritis. The composition of the present disclosure achieves the effect of treating arthritis through various efficacy experiments.

Abstract: The present disclosure provides a method for treating liver cirrhosis by using a composition including mesenchymal stem cells, extracellular vesicles produced by the mesenchymal stem cells, and growth factors. The composition of the present disclosure achieves the effect of treating liver cirrhosis through various efficacy experiments.

Abstract: An optical system affixed to an electronic apparatus is provided, including a first optical module, a second optical module, and a third optical module. The first optical module is configured to adjust the moving direction of a first light from a first moving direction to a second moving direction, wherein the first moving direction is not parallel to the second moving direction. The second optical module is configured to receive the first light moving in the second moving direction. The first light reaches the third optical module via the first optical module and the second optical module in sequence. The third optical module includes a first photoelectric converter configured to transform the first light into a first image signal.

Abstract: A galley cart system employs a dry ice compartment and a refrigeration compartment in a galley cart in flow communication with the dry ice compartment. A ventilation system is in interruptible flow communication with at least the refrigeration compartment and configured to receive gas discharged from at least the refrigeration compartment.

Abstract: A cutter and cutter-holder matching device is provided. The cutter and cutter-holder matching device includes a cutter-holder storage module, a cutter storage module, a temporary cutter-holder placement module, a cutter-holder heating module, an assembly storage module, and a first and a second clamping module. The cutter-holder storage module is configured for carrying a plurality of cutter holders. The cutter storage module is configured for carrying a plurality of cutters. The temporary cutter-holder placement module includes a temporary cutter-holder placement structure configured for carrying the cutter holder. The cutter-holder heating module is configured for heating the cutter holder that is carried by the temporary cutter-holder placement structure. The assembly storage module includes a plurality of assembly placement structures.

Abstract: Provided is an air diffuser and a construction method thereof. The air diffuser is especially applied to the field of civil aircrafts. The air diffuser comprises: an open upper end part; an open lower end part; and an air flow passage defined between the open upper end part and the open lower end part, the air flow passage comprising a first side wall and a second side wall which are connected between the open upper end part and the open lower end part and are symmetrically located with respect to a vertical center plane of the air diffuser; wherein the section outline of each of the first side wall and the second side wall has a curved shape bending inwards, such that in a direction from the open upper end part to the open lower end part, the air flow passage has, in sequence, a contraction portion bending toward the vertical center plane and an expansion portion away from the vertical center plane.

Abstract: A cutter and cutter-holder matching method includes: transferring a cutter holder to a temporary cutter-holder placement module by a first clamping module; heating the cutter holder by a cutter-holder heating module for expanding a cutter clamping hole of the cutter holder; inserting a part of a cutter into the cutter clamping hole of the cutter holder by a second clamping module; cooling the cutter holder by a cutter-holder cooling module for contracting the cutter clamping hole of the cutter holder so as to tightly clamp the cutter; and transferring the cutter holder with the cutter to an assembly storage module by the first clamping module.

Abstract: A galley cart system employs a dry ice compartment and a refrigeration compartment in a galley cart in flow communication with the dry ice compartment. A ventilation system is in interruptible flow communication with at least the refrigeration compartment and configured to receive gas discharged from at least the refrigeration compartment.

Abstract: An enhanced push-button includes a keycap disposed on an elastic member and having a top surface and an opposing bottom surface, and a reinforcing member mounted on the bottom surface of the keycap and having an outer surface facing the elastic member and an abutting portion located on the outer surface. The abutting portion has a contact surface recessed on the outer surface. The elastic member extends into the abutting portion such that the contact surface is abutted against the elastic member for allowing the keycap to be pressed with the reinforcing member against the elastic member to trigger a circuit switch. The invention can have better overall structural rigidity and operating feel and can maintain the pressing quality of the push-button and is suitable for low profile keyboards.

Abstract: A cutter and cutter-holder matching system and method are provided. The cutter and cutter-holder matching system includes a cutter-holder storage module, a cutter storage module, a temporary cutter-holder placement module, a cutter-holder heating module, an assembly storage module, and a first and a second clamping module. The cutter-holder storage module is configured for carrying a plurality of cutter holders. The cutter storage module is configured for carrying a plurality of cutters. The temporary cutter-holder placement module includes a temporary cutter-holder placement structure configured for carrying the cutter holder. The cutter-holder heating module is configured for heating the cutter holder that is carried by the temporary cutter-holder placement structure. The assembly storage module includes a plurality of assembly placement structures.

Abstract: A galley cart system employs a dry ice compartment and a refrigeration compartment in a galley cart in flow communication with the dry ice compartment. A ventilation system is in interruptible flow communication with at least the refrigeration compartment and configured to receive gas discharged from at least the refrigeration compartment.

Abstract: A fluid flow restrictor device for controlling fluid flow at a connection between ducts may include a restrictor device body that is partially or fully inserted into and disposed within one of the ducts and an outboard restrictor device flange extending radially outward at an outboard end of the restrictor device body and having an outboard flange outer diameter that is greater than an inner diameter of the ducts so that the restrictor device body or the outboard restrictor device flange is engaged by an open end surface of the duct to prevent full insertion of the fluid flow restrictor device into the duct. A body inner surface defines a restrictor opening through the restrictor device body that can be varied to achieve desired fluid flow characteristics at the connection.

Abstract: A seal assembly for a gas turbine engine employs a first seal forming an oil chamber around a bearing. The first seal is configured to maintain the oil chamber at a first pressure. A second seal forms a ventilating cavity around the oil chamber. The second seal is configured to maintain the ventilating cavity at a second pressure, the second pressure being less than the first pressure and less than an ambient pressure of a primary flow path in the engine. A pressure reducing device is coupled to the ventilating cavity. The pressure reducing device is configured to maintain the second pressure.

Abstract: A fluid flow restrictor device for controlling fluid flow at a connection between ducts may include a restrictor device body that is partially or fully inserted into and disposed within one of the ducts and an outboard restrictor device flange extending radially outward at an outboard end of the restrictor device body and having an outboard flange outer diameter that is greater than an inner diameter of the ducts so that the restrictor device body or the outboard restrictor device flange is engaged by an open end surface of the duct to prevent full insertion of the fluid flow restrictor device into the duct. A body inner surface defines a restrictor opening through the restrictor device body that can be varied to achieve desired fluid flow characteristics at the connection.

Abstract: An enhanced push-button includes a keycap disposed on an elastic member and having a top surface and an opposing bottom surface, and a reinforcing member mounted on the bottom surface of the keycap and having an outer surface facing the elastic member and an abutting portion located on the outer surface. The abutting portion has a contact surface recessed on the outer surface. The elastic member extends into the abutting portion such that the contact surface is abutted against the elastic member for allowing the keycap to be pressed with the reinforcing member against the elastic member to trigger a circuit switch. The invention can have better overall structural rigidity and operating feel and can maintain the pressing quality of the push-button and is suitable for low profile keyboards.

Abstract: A galley cart system employs a housing with a door coupled to the housing, the door configured to be moved between a closed position and an open position. A vent plate in the housing communicates between a first compartment and a second compartment. A valve plate adjacent the vent plate is movable from a venting position when the door is in the closed position to a blocking position when the door is in the open position thereby preventing flow communication between the first and second compartment.

Abstract: A galley cart system employs a dry ice compartment and a refrigeration compartment in a galley cart in flow communication with the dry ice compartment. A ventilation system is in interruptible flow communication with at least the refrigeration compartment and configured to receive gas discharged from at least the refrigeration compartment.

Abstract: A galley cart system employs a dry ice compartment and a refrigeration compartment in a galley cart in flow communication with the dry ice compartment. A ventilation system is in interruptible flow communication with at least the refrigeration compartment and configured to receive gas discharged from at least the refrigeration compartment.

Abstract: A system and method of sanitizing one or more structures within an enclosed space includes operatively coupling an ozone ventilation control unit to an ultraviolet (UV) light assembly, an ozone sensor, and an exhaust fan, using the ozone ventilation control unit to operate the UV light assembly to emit UV light into or onto structure(s) of the enclosed space during a cleaning cycle, receiving, by the ozone ventilation control unit, an ozone presence signal indicative of an amount of ozone within the enclosed space from an ozone sensor that detects the amount of ozone within the enclosed space, using the ozone ventilation control unit to selectively activate and deactivate the exhaust fan based on the amount of ozone within the enclosed space, and using the ozone ventilation control unit to selectively activate and deactivate the UV light assembly based on the amount of ozone within the enclosed space.

Abstract: An aircraft air supply system may include a primary duct to supply a primary air flow to a flight deck of an aircraft. A nitrogen generating system may be configured for generating nitrogen enriched air and oxygen enriched air. A secondary duct may be provided for channeling the oxygen enriched air from the nitrogen generating system to the primary duct. The flow of the oxygen enriched air into the primary duct and to the flight deck may be controlled to reduce an effective altitude of the flight deck.