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As with all models , however , rigid bodies do not capture all desirable characteristics of the physical system . Thus vegetation change by man , provided it causes changes in albedo and evaporation to approach the values inserted in the models , could cause regional changes in climate . The output from the Framework will include the models , training materials , and an assessment method for individual disciplines and discipline combinations . Of these models , only 15 % ( n = 4 ) model behaviors , cognitions , and neurological or neurochemical phenomena . In both models , we assumed that world excess crude oil production capacity and world fuel-switching capabilities , together totaling 850,000 barrels per day , are available immediately to help offset a disruption . " That could point to some mechanism of climate change we do n't understand , a failing in these models , or just a result of natural climate variability , " said John Turner , a climate scientist with the British Antarctic Survey in Cambridge , England . The largest variability occurred during the seedbed period for both models , which was attributed to changes in surface roughness . To do that , we need to enable people to choose the model and associated tools they use for a particular task ; in other words , to map data to both models , to enable the use of all of the tools on it , from either stack . To assess these models , we obtained documentation describing the structure of the models and the sources of variables used in the models , and discussed this information with relevant TVA staff . If precise semantics are carefully adhered to for these models , one may be able to define rules for automating many of the steps needed to convert one model representation to another , tracing between model elements , and analyzing important characteristics of the models . The contributors explore the creation of biologically realistic mathematical models of brain function , the production of microchips that incorporate those models , and the integration of microchip and brain function through neuron-silicon interfaces . We give , for both models , conditions for transience , recurrence , ergodicity , existence and non existence of moments of passage times that are expressed in terms of simple geometrical properties of the wedge , the covariance matrix of the chain and its average drifts on the boundaries , by using martingale estimates coming from Lyapunov functions . AWe get an editorial rate for all models , which is significantly lower than the usual commercial rate . In both models , type of enclosure ( complete or partial ) and environmental factors ( temperature and relative humidity ) were significant , highlighting the importance of considering the construction environment during exposure assessment . This was not very helpful , but the initial setup turns out to be the same for all models , making the omission little more than an inconvenience . The ability to preserve digital information for long periods of time is dependent upon the effectiveness of the models , standards , formats , and protocols that can be applied to overcome problems associated with technological obsolescence and the maintenance of the integrity of digital objects . Besides the highly contrived nature of these models , one problem with this is that it ’ s not even clear one wants to reproduce the SM particle structure . To allow for broad access to the models , they will be made available in documents and on the World-Wide-Web .