Book Reviews
![]() I have been using the spam filter of Mac OS X for about a year, and the effectivity has varied a lot, getting as low as 70% of received spam messages. On the other hand, currently the filter is performing excellently: 239 recognized spam messages out of 266 messages received in one week. Thus, the filter recognized 90% of spam. Not bad. And apparently there were no misclassifications of legitimate messages as spam.
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![]() The unknown butterfly is apparently Araschnia levana f. prorsa (Summer form). Here is a link to additional pictures of Araschnia.
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