Abstract: Methods, apparatus, devices, subsystems, and systems for holographically displaying three-dimensional objects are provided. In one aspect, an optical device includes: an optical guiding device configured to guide light to propagate along a first direction within the optical guiding device, the light including multiple colors of light; an in-coupling diffractive structure configured to diffract the light to propagate in the optical guiding device; and a plurality of out-coupling diffractive structures arranged downstream of the in-coupling diffractive structure along the first direction and configured to diffract at least part of the light out of the optical guiding device along a second direction different from the first direction. The optical device can be configured for at least one of: color crosstalk suppression among the multiple colors of light, display zero order light suppression, dispersion compensation, or ambient light blocking.

Abstract: Disclosed herein are a system and method for efficiently routing high-priority frames through a wireless network based on markings of the frames by a data link layer, a network layer, or an application layer in a five-layer protocol stack. When a real-time application, such as a video or gaming application, is to be sent to one or more stations in the wireless network, the access point determines the strategy for routing the high-priority frames based on the markings received from the data link, network, or application layer. Strategies include discarding non-I frames when there is congestion in the wireless network, replicating I-frames to assure reliable delivery to the stations, scheduling I-frames with preference, and moving I-frames ahead in a buffer in the access point.

Abstract: A signaling mechanism is provided that includes a restricted random access resource unit (XRA RU) that restricts uplink random access, such as by using Uplink Orthogonal frequency-division multiple access-based Random Access (UORA), to a subset of a plurality of stations that are associated with an Access Point (AP). In one aspect, an AP allocates a resource unit as an XRA RU that restricts uplink random access to a subset of a plurality of stations (STAs) that are associated with the AP. The AP transmits an uplink trigger that includes the XRA RU. The AP restricts use of the XRA RU to the subset of the plurality of STAs. In this way, STAs of the subset can attempt contention-based random access with the XRA RU while other STAs are prevented from attempting random access with the XRA RU.

Abstract: Access Point ranging and placement on a floorplan may be provided. A host AP may range each neighbor AP of the host AP. One or more neighbor APs that failed ranging with the host AP may be categorized in a failed neighbor AP list. The host AP may re-range each of the one or more neighbor APs in the failed neighbor AP list with a modified ranging parameter. At least one neighbor AP of the one or more neighbor APs may be categorized in the failed neighbor AP list that succeeded in re-ranging with the host AP in an extended range neighbor AP list.

Abstract: Apparatus and methods for storing and transporting electronic devices. A housing includes a base, opposing sides, a movable cover, and an open lower end. The base has a cutout portion at the lower end. The movable cover is generally coextensive with and parallel to the base, and is resiliently biased into a normally closed position. The cover includes an access aperture at the lower end. Stop means are also provided at the lower end, partially blocking the opening and preventing a stored device from falling out of the housing's lower end. The cutout portion and the aperture allow entry of the user's hand into the housing for either insertion or withdrawal of the device. During either process, the user's hand causes the cover temporarily to be raised into an open position. A sling, a backpack harness, or a handle may be selectively attached to the housing for transport or storage.

Abstract: Apparatus and methods for storing and transporting electronic devices. A housing includes a base, opposing sides, a movable cover, and an open lower end. The base has a cutout portion at the lower end. The movable cover is generally coextensive with and parallel to the base, and is resiliently biased into a normally closed position. The cover includes an access aperture at the lower end. Stop means are also provided at the lower end, partially blocking the opening and preventing a stored device from falling out of the housing's lower end. The cutout portion and the aperture allow entry of the user's hand into the housing for either insertion or withdrawal of the device. During either process, the user's hand causes the cover temporarily to be raised into an open position. A sling, a backpack harness, or a handle may be selectively attached to the housing for transport or storage.

Abstract: An ultra lightweight hammock for suspension between two trees includes a rectangular top panel joined along at least three side and end edges to a bottom panel. An elongate opening permits access between the top and bottom panels. Tubular sleeves form each end of the hammock and receive elongate webs which extend from the ends of the tubular sleeves around an adjacent tree to be secured by an adjustable buckle attachment. An option pocket may be formed in the bottom panel to receive a sleeping pad.

Abstract: An ultra lightweight hammock for suspension between two trees includes a rectangular top panel joined along at least three side and end edges to a bottom panel. An elongate opening permits access between the top and bottom panels. Tubular sleeves form each end of the hammock and receive elongate webs which extend from the ends of the tubular sleeves around an adjacent tree to be secured by an adjustable buckle attachment. An option pocket may be formed in the bottom panel to receive a sleeping pad.

Abstract: A thermal device for maintaining the temperature of body extremities is provided. The device includes a pocket adapted to receive a heating element and a strap attached to the pocket such that the device is adapted to encircle and be secured around a portion of the human body. The pocket has a tri-fold configuration formed from a rear panel, a front panel, and an intermediate panel positioned atop one another, the intermediate panel being positioned between the front panel and the rear panel. Each of the three panels is connected along their respective vertical side edges. The first horizontal edges of the front panel and the rear panel are fixedly attached forming a first open space between the front panel and the intermediate panel and the second horizontal edges of the rear panel and the intermediate panel are fixedly attached forming a second open space therebetween.

Abstract: An electromagnetic indicator capable of binary indication including a rotatably mounted semicircular flag assembly which can rotate between a first position ("set") and a second position ("fault") upon the receipt by the indicator of an electrical signal. A portion of the flag assembly is permanently magnetized and is magnetically latched in either the "set" or "fault" position by a magnetic latch which is preferably comprised of a bracket and core bar. The bracket has two ends which are positioned so that they are adjacent the magnetized portion of the flag assembly. The core bar is magnetically connected to an electromagnet and is also positioned adjacent a magnetized portion of the flag assembly. When the electromagnet is connected to the appropriate terminal of an electrical power source, the electromagnet generates a magnetic field, magnetizes the two ends of the bracket means and the core bar, and causes the flag assembly to flip from the "set" position to the "fault" position, or vice versa.

Abstract: An indicator for monitoring a channel fault is located in each channel of a multichannel system. An interface is located between each indicator and channel being monitored to assure a response of the indicator under circumstances that a fault signal in the channel could not have otherwise activated the indicator.

Abstract: An indicator flag is movable alternately into one of a plurality of display positions thereby to provide a distinguishable visual indication in each position. The indicator flag carried by a movable assembly is actuated by electromagnetic means and the movable assembly is latched in each display position. A pair of switches are associated with and controlled by the movable assembly from a normally closed to an open condition. The switches may function variously to control associated equipment or switch the electromagnetic means so that drive energy is required only during transition of the indicator flag from one of the plurality of display positions to another, among others.

Abstract: A binary indicator including a pair of indicator discs mounted along a common axis has means for damping rotational movement of a resetting structure in one direction following movement imparted to the resetting structure in the other direction for purposes of resetting the relative positions of the indicator discs to their relative positions prior to their relative relocation occasioned by a fault or malfunction condition. One indicator disc undergoes movement, the movement in both directions being induced magnetically. And, movement of the resetting structure in the other rotational direction is against the forces of rotational elasticity of spring means. A force for damping rotational movement of the resetting structure in the one rotational direction is developed by viscous-shear frictional engagement between a pair of friction discs biased into juxtaposition with a viscous film therebetween by the spring means under compression.