Abstract: A method executed by an electronic device includes receiving measurements from one or more one sensor systems, wherein each of the sensor systems measures characteristic variables of a respective space located proximate to the sensor system and is removably attached to a bin that defines the respective space. The method includes determining, for each of the respective spaces, whether a measured characteristic variable of the respective space satisfies one or more conditions for generating a maintenance request. For each of the respective spaces, the method includes: in response to determining a condition, from among the one or more conditions for generating a maintenance request, is satisfied by a measured characteristic variable of the respective space, generating the maintenance request in association with an identifier of the sensor system. For each of the respective spaces, the method includes: transmitting a message to a mobile device, the message including the maintenance request.

Abstract: A linkage system includes at least one adapter and a connector. Each adapter includes a clamp configured to attach to a frame of a wheelchair. Each adapter includes a pivot angle limiter configured to attach to the clamp. The pivot angle limiter includes a top plate and a bottom plate, each having a central hole through which a pivot shaft is insertable to define a pivot axis for a connector to rotate about. The pivot angle limiter includes first and second barriers, each extending between the top plate and the bottom plate. The first and second barriers define a maximum pivot angle that has a vertex at the pivot axis. The at least one adapter may include a first adapter connected to one end of the connector and to a first wheelchair, and a second adapter connected to an opposite end of the connector and to a second wheelchair.

Abstract: A linkage system includes at least one adapter and a connector. Each adapter includes a clamp configured to attach to a frame of a wheelchair. Each adapter includes a pivot angle limiter configured to attach to the clamp. The pivot angle limiter includes a top plate and a bottom plate, each having a central hole through which a pivot shaft is insertable to define a pivot axis for a connector to rotate about. The pivot angle limiter includes first and second barriers, each extending between the top plate and the bottom plate. The first and second barriers define a maximum pivot angle that has a vertex at the pivot axis. The at least one adapter may include a first adapter connected to one end of the connector and to a first wheelchair, and a second adapter connected to an opposite end of the connector and to a second wheelchair.

Abstract: A method executed by an electronic device includes receiving measurements from one or more one sensor systems, wherein each of the sensor systems measures characteristic variables of a respective space located proximate to the sensor system and is removably attached to a bin that defines the respective space. The method includes determining, for each of the respective spaces, whether a measured characteristic variable of the respective space satisfies one or more conditions for generating a maintenance request. For each of the respective spaces, the method includes: in response to determining a condition, from among the one or more conditions for generating a maintenance request, is satisfied by a measured characteristic variable of the respective space, generating the maintenance request in association with an identifier of the sensor system. For each of the respective spaces, the method includes: transmitting a message to a mobile device, the message including the maintenance request.

Abstract: A mask that completely seals to the face of the wearer includes a filter material having a shape and size selected to cover a mouth and nose of the wearer. The mask also includes an adhesive ring disposed on one surface of the filter material at or near a circumferential edge of the filter material, the adhesive ring forming a closed loop around the circumferential edge of the filter material, the adhesive ring configured to removably adhere to a face of the wearer.