We constructed a Japanese opinion extraction system for Japanese newspaper articles using a machinelearning method for the system. We used opinionannotated articles as learning data for the machinelearning method. The system extracts opinionated sentences from newspaper articles, and specifies opinion holders and opinion polarities of the extracted sentences. The system also evaluates whether o...

The specific characteristic of classification of medical documents from the MEDLINE database is that each document is assigned to more than one category, which requires a system for multilabel classification. Another major challenge was to develop a scalable method capable of dealing with hundreds of thousand of documents. We proposed a novel system for automated classification of MEDLINE docum...

(Library and Information Science Abstracts) database records were consulted. After detailed comparisons, it was found that keywords provided by authors have an important presence in the database descriptors studied; nearly 25% of all the keywords appeared in exactly the same form as descriptors, with another 21% though normalized , still detected in the descriptors. This means that almost 46% o...