A method of recovering hydrocarbons from shale formations wherein a borehole is drilled under underbalanced conditions into a hydrocarbon-containing formation and, following fracturing with a cryogenic liquid, hydrocarbons released from the fractured formation are produced and recovered. The deployment of InAlGaAs waveguides provides for high uniform photoluminescent emission wavelength across the wafer for InAlGaAs waveguides as compared to InGaAsP waveguides as now commonly employed in such optical devices or components. The air management system comprises an air passageway, formed by a U-trap, between an inlet in the air space and an exterior of the cabinet. The temporal line group is segmented into a cluster. The compositions are blends of one or more polyolefin base resins and graft-modified polyolefin to which a low level of adhesion promoter is added.