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While putting that together , I began to think that " hose " should be a species of " river " that comes into existence for the single purpose of aggregating topic searches about specific incidents : a fire , a hurricane , a flood , a snowstorm , a terrorist attack , whatever . Automated clients MAY provide a configuration setting that disables this check , but MUST provide a setting which enables it . Thereby , floor control complements other functions - - such as conference and media session setup , conference policy manipulation , and media control - - that are realized by other protocols . Instead , some external mechanism , such as conference management ( e.g ., CPCP or web interface for policy manipulation ) is used for that . These studies indicate that the cost depends on long-term and intangible effects as well as on immediate , short-term , or tangible factors . Glass objects ( such as windows ) and metal are good conductors of heat and bad insulators , whereas foam and fiberglass make poor conductors and thus good insulators .