Recently there is tremendous growth in the applications that require video streaming over wireless networks. Enhancing and maintaining the video quality over IEEE 802.11e Wireless Mesh Networks is one of the challenging tasks. Quality of video is affected by varying channel conditions, interference from the neighboring nodes and several problems created by wireless links. This review paper discusses the approach which implements cross-layer design that enhances the quality of MPEG-4 video transmission by optimizing the control parameters across the different protocol layers. Multimedia transmission has constraints on delay whereas the normal traffic has constraints on loss. Routing protocol must be modified so as to add proper routing metric depending on the content at the application layer. Hence by dynamically adapting the routing metrics-Expected Transmission Count (ETX) metric and hopcount, best QoS route can be selected. This approach improves the performance of network with respect to parameters such as throughput, average end-to-end delay, packet delivery ratio, average peak signal to noise ratio.

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This paper presents the design of heat recovery system for oven in paint shop. The hot air generated in oven is directly passed to the environment through the exhaust. Oven's unused heat is exhausted to atmosphere at High Temperature. The exhausted heat carrying flue gas is at high temperature. The system is to reuse that air for hot water generation. The hot water generated will be at temperature of boiling point approximately. That water then can be used for several processes. Heat energy for total hot water heating is very large. Hence the potential of energy recovery & reuse is realized. Average 90% of energy can be recovered from oven exhaust. The technique used is heat exchanger with gas to liquid heat transfer.