Abstract: Techniques (e.g., methods, systems, devices) for receiving, from the lidar device, a measurement of the inertial measurement sensor. The techniques further including determining, using the measurement, at least one angle of a pitch angle or a roll angle of the lidar device. The techniques further including fixing the at least one angle of the lidar device in a graphical user interface that displays a location of the lidar device and providing one or more control elements in the graphical user interface that enable a user to specify one or more other degrees of freedom of the lidar device.

Abstract: A filter canister assembly for a gas mask comprising a primary canister with a first filter medium adapted to remove aerosols, particulate materials and droplets from air and a second filter medium comprising an adsorbent filter medium adapted to remove toxic gases and arranged in serial communication with the first filter medium in the first canister. A supplementary filter canister has a third filter media adapted to intercept toxic industrial materials and is removably mounted to a first end of the first housing to supplement the ability of the primary filter canister to filter toxic industrial gases.

Abstract: A filter for a gas mask has an elliptical or circular, convex shape to conform to the curvature of the wearer's face, or a planar shape. The filter comprises a double particulate filter element and a double adsorption filter element configured for axial airflow therethrough with a bifurcated flow pattern. The adsorption filter element comprises a granulated charcoal, a composite material having carbon particles combined with binder particles, or an immobilized bed of charcoal granules and EVA-coated fibers.

Abstract: Systems and methods for determining the presence of a wireless network connection point based upon wireless network characteristics. Examples of such characteristics include, but are not limited to: message length, repetition rate and response timing. These types of characteristics are used to differentiate various types of wireless networks from other radio frequency signals within a given band. The output of the locator is compared against desired thresholds to indicate signal strengths roughly corresponding to current wireless networks cards.