Sentences with phrase «tree leaf sample»

Via a combination of computer modeling, laboratory experiments, and field studies, the researchers looked at how many oVOCs were taken up by a poplar tree leaf sample.

Not exact matches

Issued in May 2011, it covers a computer system comprising a data store containing a decision tree that is constructed to produce a predicted geographic location for an IP address associated with a user; and a computing device that obtains a first set of sample data including IP addresses and user profile information; trains the decision tree with the first set of sample data; obtains a second set of sample data including geographic location information correlated with an IP address; prunes the trained decision tree with the second set of data; and then qualifies the decision tree with a third set of sample data to assign to each leaf node a confidence score indicating the degree of accuracy of a predicted geographic location.

Neil Pederson, one of Hessl's colleagues, dated this sample of a long - dead pine from Mongolia (upper left) and discovered the tree lived from the seventh to 14th centuries and was alive when Genghis Khan built his empire.

Scientists climbed several rare and endangered tree species on Penang Hill to document the orchids, ferns, and epiphytes (or air plants) thriving at such heights and to press leaf samples for further study.

Periodically, laboratory workers roam the forest to sample bark, small branches, and leaves to assess the trees» success in pollution extraction.