Distance notification systems are described herein which, in some embodiments, are wearable by a user to maintain proper social distancing in any environment. Additionally, distance notification systems described herein can be applied to motorized equipment and/or other machinery in efforts to maintain a safe workplace, such as in factories, construction sites, warehouses, and/or other logistics operations. In one aspect, a distance notification system comprises a signal component, and a receiving component for processing encoded signal generated by the signal component into system user notifications. The encoded signal has power in excess of a predetermined threshold within a set distance between the signal component and the receiving component, wherein less than 10 percent of system user notifications are produced by encoded signal reflected from one or more surfaces.

An information processing device includes circuitry that estimates an attribute of a first person located in at least one of a plurality of areas, and sets a first content corresponding to the attribute of the first person and outputs a sound through wave field synthesis so that a sound field of the set first content is spatially transmitted to at least the one of the plurality of areas via a plurality of speakers.

An interactive information terminal with variable form, comprising an information terminal, a rotating device, and a bracket, wherein the information terminal is fixed on the bracket by the rotating device, the rotating device includes a fixing member, a rotating member, and a rotating shaft, the fixing member is detachably connected with the information terminal, the rotating member is detachably connected with the bracket, and the rotating member is rotatably connected with the fixing member through the rotating shaft, so as to realize that the rotating member rotates around the axial line of the rotating shaft.

The purpose of the present invention is to provide a magnetic fluid display in which a magnetic fluid moves in response to a magnetic field and which may display a unique visual image according to the meeting and parting of the magnetic fluid. A magnetic fluid display (10) according to the present invention comprises: a display unit (110) including a transparent liquid into which a magnetic fluid (111) is injected; and a magnetic field generating unit (200) for applying a magnetic field (M) to the magnetic fluid (111) at a rear surface of the display unit (110). When the magnetic field is applied, the magnetic fluid moves in the transparent liquid in a directional manner, so that an image may be displayed on the display unit.

The purpose of the present invention is to provide a magnetic fluid display in which a magnetic fluid moves in response to a magnetic field and which may display a unique visual image according to the meeting and parting of the magnetic fluid. A magnetic fluid display (10) according to the present invention comprises: a display unit (110) including a transparent liquid into which a magnetic fluid (111) is injected; and a magnetic field generating unit (200) for applying a magnetic field (M) to the magnetic fluid (111) at a rear surface of the display unit (110). When the magnetic field is applied, the magnetic fluid moves in the transparent liquid in a directional manner, so that an image may be displayed on the display unit.

An extruded post used to support a sign, mailbox or set of rails, or in a stand-alone mode, with an interior light source to illuminate characters cut out of the wall of the post or rail for identification of a property or to transmit a message. The light source is inserted into the interior of the post or rail. A translucent sheet is placed within the wall of the post or rail and in front of the illumination source. A reflective backing, with a locking aspect, is inserted into the post or rail to reflect light from the light source thru the translucent sheet and thru the cut out characters. Power for the illumination is provided by a solar charged battery placed in a cap on top of the post. A processing unit is placed in line between the power source and the illumination to generate light patterns and effects.

The disclosed subject matter provides a digital sign with a video camera. The digital sign and video camera are connected via a communications medium to a central computer. The central computer provides a way of changing the images displayed on the digital sign and of disseminating the video from the video camera either through real time forwarding/viewing or recording the real time video stream and playing back the recorded video to a user. The central computer also provides a user interface where an authorized user, which would normally include an authorized governmental entity, can view the video stream and unilaterally interrupt the normally displayed image (or series of images) with an emergency notification message that would display on the digital sign.

The disclosed subject matter provides a digital sign with a video camera. The digital sign and video camera are connected via a communications medium to a central computer. The central computer provides a way of changing the images displayed on the digital sign and of disseminating the video from the video camera either through real time forwarding/viewing or recording the real time video stream and playing back the recorded video to a user. The central computer also provides a user interface where an authorized user, which would normally include an authorized governmental entity, can view the video stream and unilaterally interrupt the normally displayed image (or series of images) with an emergency notification message that would display on the digital sign.

A crowd management system (CMS), is disclosed which includes a command and control (C2) subsystem, a sensor network in communication with the C2 subsystem and adapted to provide signals corresponding to geographical number of individuals in a venue, and one or more crowd management devices (CMDs) further in communication with the C2 subsystem, each of the CMDs including a base adapted to release air at a high pressure, the base further including a positional device adapted to position the base according to a selective position, and an inflatable body terminating into a predefined shape adapted to convey a predefined message to individuals near the CMDs.

A signage control system comprises: a primary estimation circuitry to use signage-side images and surveillance-side images to estimate a person feature, attributes and behavior of each person captured in these frame images; a storage device to associate and store results of estimations of the person feature, the attributes and the behavior of each specific person; an estimation result linkage circuitry to use the person feature stored in the storage device to link the results of estimations based on the frame images from multiple ones of the cameras for the same person so as to generate a group of estimation results for each person; and a content change circuitry to change a content displayed on the signage to another based on the attributes of each person expected to be in a position where such person can visually recognize the content on the signage, and based on preceding behavior of such person.