Abstract: A device executes an application that uses an augmented reality experience on a building construction site to provide productivity tracking for projects. The tracking compares the field installation against a coordinated construction model to provide real-time feedback on the completion of the project. Markers are used to determine a location of the device so that the appropriate model data is made available. The data is assimilated into key performance indicators and reports for project stakeholders.

Abstract: A method is provided for separating one or more volatile contaminant components from a gas using a pressure and temperature swing adsorbent filtration filter bed system containing three or more layers of adsorbent materials characterized in that the layers comprise a first layer of adsorbent material, a second layer of dessicant material and a third layer of material capable of adsorbing contaminants that are not retained by the first layer. Preferably the third layer is capable of adsorbing contaminants of relatively low boiling point, e.g. of boiling point less than 50.degree. C., and preferably comprises a microporous adsorbent. The second layer of dessicant material preferably comprises a zeolite.