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Through a mix of science , autobiography , case studies , and speculation , Jonathan Cole shows the importance not only of facial expressions for communication among individuals but also of facial embodiment for our sense of self . LIR instructors are a mix of university professors , graduate students , LIR and community members – all willing to volunteer and share their expertise . New digital WAN services such as ATM ( asynchronous transfer mode ) could be added to the network mix as needed , without making the existing network infrastructure obsolete . Emission taxes , command-and-control regulations and other non-market policies are likely to be part of the policy mix needed to achieve the Kyoto targets , but they fail to exploit cost efficiencies and may not yield the desired emission reductions .