The present application thus provides a turbine bucket. The pressure at which cooling and purge air is supplied to the turbine outer side wall cavities is modulated, based on compressor discharge pressure, thereby to generally maintain the back flow margin so as to minimize excessive leakage and the consequent performance deterioration. The air guiding device has at least two components, wherein the at least two components are substantially made from plastic material. The controller is configured to control the second circuit to receive the power from both of the battery and the external power supply device when the consumed power detected by the first circuit is higher than a capacity of the external power supply device. Methods of making lignoepoxy resins without the use of volatile organic compounds are also provided. The invention teaches how to exchange IP packets between at least two nodes of the IP network for establishment of a session therebetween, to initialize, at a first one of the at least two nodes, a static portion of a decompression context prior to completion of the establishment of the session and to uncompress application related IP packets exchanged with a second of the at least two nodes.