Abstract: A system performs a distributed version control on a data lake. A change to the data lake can be performed within a single atomic commit that defines a set of changes. Commits are built on top of each other and describe incremental changes, which creates a sequence of atomic commits that defines a history of changes. The commits can be identified by hash values, and branches can be defined to refer to commits. A new commit updates a branch head reference to the new commit so that the branch head always refers to the latest version of a chain of commits in the branch. The system can create tags that define, for example, a release version and can merge source commits onto target commits including merging the head of one branch onto the head of another branch.

Abstract: A portable device for receiving a liquid from a floor via a squeegee or another scraping implement includes a container having a bottom and an opening that is distanced from the bottom, a ramp that extends from the opening of the container to a position generally levelled with the bottom, the ramp being adapted to receive the squeegee in a scraping movement thereon, and a handle portion that is more distanced from the bottom of the container than the opening thereof. The handle portion is adapted to receive a blade portion of the squeegee in order to move the device therewith.

Abstract: A portable device for receiving a liquid from a floor via a squeegee or another scraping implement includes a container having a bottom and an opening that is distanced from the bottom, a ramp that extends from the opening of the container to a position generally levelled with the bottom, the ramp being adapted to receive the squeegee in a scraping movement thereon, and a handle portion that is more distanced from the bottom of the container than the opening thereof. The handle portion is adapted to receive a blade portion of the squeegee in order to move the device therewith.

Abstract: A control bar for removable attachment to a traction mechanism is formed by a plurality of elongated bar segments connected end to end, such that the control bar can be formed in a plurality of shapes, and is thereby adapted to be more easily manipulated by a user shifting their body weight to steer and maneuver the propulsion system.

Abstract: A control bar for removably attachment to a traction mechanism is formed by a plurality of elongated bar segments connected end to end, such that the control bar can be formed in a plurality of shapes, and is thereby adapted to be more easily manipulated by a user shifting their body weight to steer and maneuver the propulsion system.

Abstract: An autonomous propulsion system comprising a motorized unit including a traction mechanism; and a control bar removably attached to the traction mechanism and formed by a plurality of elongated bar segments connected end to end, such that the control bar can be formed in a plurality of shapes, and is thereby adapted to be more easily manipulated by a user shifting their body weight to steer and maneuver the propulsion system.