Abstract: An indication to remove one or more data in a time series database is received. A metadata index associated with the time series database is updated to indicate a soft removal of each data of the one or more data. A data hole index associated with the time series database is updated to indicate a data hole at a location of each data of the one or more data in the time series database. Responsive to an input/output rate for the time series database being below a threshold, the data hole of each data of the one or more data is optimized.

Abstract: A foldable walker device includes a front frame and a rear frame. The front frame and the rear frame are pivotally connected with each other and can be relatively folded and unfolded. A seat board bridged between the front frame and the rear frame. At least one link, a front end of the link is pivotally connected with the seat board, a rear end of the link is pivotally disposed on the rear frame. When folding the walker device, the rear end of the seat board is lifted, whereby the link pivotally connected with the seat board drives the rear frame to move forward and get closer to the front frame. Under such circumstance, the walker device is folded into a minimum volume so as to minimize the room occupied by the walker device. This facilitates the storage and transfer of the walker device.

Abstract: A base structure for a walking stick comprises a body including a connecting support and a plurality of extending legs, the connecting support including a retaining chamber formed around an inner wall thereof to receive a post, and the extending legs extending radially from a bottom end of the connecting support, each of the extending legs including an arcuate arm and a block, and one end of the arcuate arm connected on the bottom end of the connecting support so as to obtain flexibility, the block being located on another end of the arcuate arm and including a plane to abut against the ground; and a washer secured in a bottom surface of the retaining chamber to bias against a bottom end of the post.

Abstract: An auxiliary descending device for a toilet seat comprises a base disposed on the top of a toilet seat and including a cushion for covering the base. The base also includes a through hole vertically formed at the central portion thereof for communicating with a central opening of the toilet seat so that the front end of the cushion may axially connect with the base by way of a coupling structure. Two supports for user's holding by hands are secured on two sides of the base respectively, and the free ends thereof are coupled onto the rear periphery of the cushion, between the base and the cushion are mounted suffering elements so as to have expandable positioning between the rear ends of the cushion and the base and to control the supports to swing upwardly and then to be positioned, thereby having comfortness while in use.

Abstract: A chair includes a support having one or more vertical rails to slidably receive one or more brackets, each bracket includes an opening formed between two ears, a seat plate includes one or more cams disposed in the opening of the bracket and rotatably secured to the ears of the bracket with a shaft, to allow the seat plate to be rotated relative to the bracket and the support. The cam may engage with the rail to support the seat plate in a folding position when the seat plate is parallel to the support, and may also to engage with the rail to support the seat plate in an open and working position when the seat plate is perpendicular to the support.

Abstract: A toilet seat device includes a seat disposing on a lavatory bowl, and a fastener device for detachably fastening the seat to the lavatory bowl and for assisting disabled or handicapped or crippled persons to seat on the lavatory bowl. The seat device may be easily carried with the users, and may be attached to the lavatory bowls of various toilets. The fastening device includes one or more bars for engaging onto the lavatory bowl, and for threading to the seat with a fastener. The seat includes one or more protrusions for threading with the fasteners. The bar includes one or more pegs to engage into the seat, and to anchor the bar to the seat.