A tubular transportation system is disclosed for transporting one or more passengers or one or more cargos via a capsule along a predetermined route. The tubular transportation system has: (1) a plurality of substantially evacuated tubes arranged along the predetermined route, where each tube is maintained at a pressure that is below atmospheric pressure; and (2) means for maintaining within each tube in the plurality of substantially evacuated tubes, a gaseous composition comprising a mixture of a first percentage, x, of hydrogen and a second percentage, (100-x), of air, and wherein the first percentage, x, of hydrogen is picked based on a predetermined power value and a leak rate associated with the tube.

A workstation includes a housing and a pneumatic tube port sized and shaped to connect to tubing of a pneumatic tube delivery system. The workstation includes a carrier dispatch and arrival mechanism coupling to the pneumatic tube port and having an outlet and a slide plate movable from a position opening the outlet to a position closing the outlet. The carrier dispatch and arrival mechanism further including a dispatch arm for loading an outbound carrier for transportation from the workstation through the pneumatic tube delivery system to a further workstation. The workstation further comprises an equipment storage compartment adjacent to the carrier dispatch and arrival mechanism and a bin at the bottom of the housing sized and shaped to receive and store the inbound carriers in combination with a user interface cabinet housing a user interface apparatus and a space for supporting stored carriers.

A workstation includes a housing and a pneumatic tube port sized and shaped to connect to tubing of a pneumatic tube delivery system. The workstation includes a carrier dispatch and arrival mechanism coupling to the pneumatic tube port and having an outlet and a slide plate movable from a position opening the outlet to a position closing the outlet. The carrier dispatch and arrival mechanism further including a dispatch arm for loading an outbound carrier for transportation from the workstation through the pneumatic tube delivery system to a further workstation. The workstation further comprises an equipment storage compartment adjacent to the carrier dispatch and arrival mechanism and a bin at the bottom of the housing sized and shaped to receive and store the inbound carriers in combination with a user interface cabinet housing a user interface apparatus and a space for supporting stored carriers.

A conduit access includes a base plate, a sensor, a motor, and a pivoting door plate. The base plate includes a pivot joint, a pass-through, and a stop. The pivot joint is at an edge of the base plate and extends toward a backside of the base plate. The pass-through is in a center of the base plate. The stop is on a rim of the base plate. The stop has a raised thickness on a frontside of the base plate. The sensor is in the pivot joint to detect motion. The motor is coupled to the pivot joint on the backside of the base plate. The motor activates on detection at the sensor. The pivoting door plate is parallel to the base plate. The pivoting door plate is coupled to the motor through the pivot joint to pivot across the frontside of the base plate to cover the pass-through.

A conduit access includes a base plate, a sensor, a motor, and a pivoting door plate. The base plate includes a pivot joint, a pass-through, and a stop. The pivot joint is at an edge of the base plate and extends toward a backside of the base plate. The pass-through is in a center of the base plate. The stop is on a rim of the base plate. The stop has a raised thickness on a frontside of the base plate. The sensor is in the pivot joint to detect motion. The motor is coupled to the pivot joint on the backside of the base plate. The motor activates on detection at the sensor. The pivoting door plate is parallel to the base plate. The pivoting door plate is coupled to the motor through the pivot joint to pivot across the frontside of the base plate to cover the pass-through.

A workstation includes a housing and a pneumatic tube port sized and shaped to connect to tubing of a pneumatic tube delivery system. The workstation includes a carrier dispatch and arrival mechanism coupling to the pneumatic tube port and having an outlet and a slide plate movable from a position opening the outlet to a position closing the outlet. The carrier dispatch and arrival mechanism further including a dispatch arm for loading an outbound carrier for transportation from the workstation through the pneumatic tube delivery system to a further workstation. The workstation further comprises an equipment storage compartment adjacent to the carrier dispatch and arrival mechanism and a bin at the bottom of the housing sized and shaped to receive and store the inbound carriers in combination with a user interface cabinet housing a user interface apparatus and a space for supporting stored carriers.

A workstation includes a housing and a pneumatic tube port sized and shaped to connect to tubing of a pneumatic tube delivery system. The workstation includes a carrier dispatch and arrival mechanism coupling to the pneumatic tube port and having an outlet and a slide plate movable from a position opening the outlet to a position closing the outlet. The carrier dispatch and arrival mechanism further including a dispatch arm for loading an outbound carrier for transportation from the workstation through the pneumatic tube delivery system to a further workstation. The workstation further comprises an equipment storage compartment adjacent to the carrier dispatch and arrival mechanism and a bin at the bottom of the housing sized and shaped to receive and store the inbound carriers in combination with a user interface cabinet housing a user interface apparatus and a space for supporting stored carriers.

A conduit access includes a base plate, a sensor, a motor, and a pivoting door plate. The base plate includes a pivot joint, a pass-through, and a stop. The pivot joint is at an edge of the base plate and extends toward a backside of the base plate. The pass-through is in a center of the base plate. The stop is on a rim of the base plate. The stop has a raised thickness on a frontside of the base plate. The sensor is in the pivot joint to detect motion. The motor is coupled to the pivot joint on the backside of the base plate. The motor activates on detection at the sensor. The pivoting door plate is parallel to the base plate. The pivoting door plate is coupled to the motor through the pivot joint to pivot across the frontside of the base plate to cover the pass-through.

A conduit access includes a base plate, a sensor, a motor, and a pivoting door plate. The base plate includes a pivot joint, a pass-through, and a stop. The pivot joint is at an edge of the base plate and extends toward a backside of the base plate. The pass-through is in a center of the base plate. The stop is on a rim of the base plate. The stop has a raised thickness on a frontside of the base plate. The sensor is in the pivot joint to detect motion. The motor is coupled to the pivot joint on the backside of the base plate. The motor activates on detection at the sensor. The pivoting door plate is parallel to the base plate. The pivoting door plate is coupled to the motor through the pivot joint to pivot across the frontside of the base plate to cover the pass-through.

A microfabricated sheath flow structure for producing a sheath flow includes a primary sheath flow channel for conveying a sheath fluid, a sample inlet for injecting a sample into the sheath fluid in the primary sheath flow channel, a primary focusing region for focusing the sample within the sheath fluid and a secondary focusing region for providing additional focusing of the sample within the sheath fluid. The secondary focusing region may be formed by a flow channel intersecting the primary sheath flow channel to inject additional sheath fluid into the primary sheath flow channel from a selected direction. A sheath flow system may comprise a plurality of sheath flow structures operating in parallel on a microfluidic chip.