Abstract: A multi-directional digital camera comprising: a light sensor capable of converting incoming light beams into an electrical signal output representing an imaged scene; one or more multi-mode optical path controlling elements, each having at least two operation modes including (a) a first operation mode in which the multi-mode optical path controlling element reflects the light beams directed thereon, and (b) a second operation mode in which the multi-mode optical path controlling element enables passage of the light beams directed thereon; a controller configured to selectively change the imaged scene by selectively changing an optical path of the light beams, wherein changing the optical path is made by changing the operation modes of one or more of the multi-mode optical path controlling elements.

Abstract: A multi-directional projector includes: a laser source capable of emitting laser beams, a reflective surface capable of reflecting the laser beams emitted by the laser source, wherein the reflective surface is movable by a movement mechanism, for causing the laser beams to reflect to a plurality of directions, a plurality of optical elements, each capable of directing incoming laser beams of the laser beams, being the laser beams directed by the reflective surface when moved by the movement mechanism at the direction of the respective optical element, to a respective projection direction with respect to the laser source, wherein at least two of the optical elements direct the respective incoming laser beams in different projection directions having at least a 90 degrees difference.

Abstract: Mechanisms, including systems, methods, and non-transitory computer readable media, for implementing conflict-free replicated data types in in-memory data structures are provided, the mechanisms comprising: a memory; and at least one hardware processor coupled to the memory and collectively configured to: mark a first key of a conflict-free replicated data type as to be deleted; send an update message reflecting that the first key is to be deleted to a first replica of an in-memory data structure; receive a plurality of messages each acknowledging that the first key is to be deleted; determine that the plurality of messages includes a message for each of a plurality of shards of the first replica; and in response to determining that the plurality of messages includes a message for each of the plurality of shards of the first replica, delete the first key.