Wyniki wyszukiwania - BazTech

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A case study in text mining of discussion forum posts: Classification with bag of words and global vectors

Cichosz P.

International Journal of Applied Mathematics and Computer Science

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2018

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Vol. 28, no. 4

787--801

EN

Despite the rapid growth of other types of social media, Internet discussion forums remain a highly popular communication channel and a useful source of text data for analyzing user interests and sentiments. Being suited to richer, deeper, and longer discussions than microblogging services, they particularly well reflect topics of long-term, persisting involvement and areas of specialized knowledge or experience. Discovering and characterizing such topics and areas by text mining algorithms is therefore an interesting and useful research direction. This work presents a case study in which selected classification algorithms are applied to posts from a Polish discussion forum devoted to psychoactive substances received from home-grown plants, such as hashish or marijuana. The utility of two different vector text representations is examined: the simple bag of words representation and the more refined embedded global vectors one. While the former is found to work well for the multinomial naive Bayes algorithm, the latter turns out more useful for other classification algorithms: logistic regression, SVMs, and random forests. The obtained results suggest that post-classification can be applied for measuring publication intensity of particular topics and, in the case of forums related to psychoactive substances, for monitoring the risk of drug-related crime.

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An application framework to systematically develop complex learning resources based on collaborative knowledge engineering

Gañán D., Caballé S., Conesa J., Xhafa F.

International Journal of Applied Mathematics and Computer Science

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2015

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Vol. 25, no. 2

361--375

EN

This contribution proposes software infrastructure to support new types of learning methodologies and resources based on collaborative knowledge engineering by means of an innovative application framework called the virtualized collaborative sessions framework (VCSF). The VCSF helps meet challenging collaborative knowledge engineering requirements in online learning, such as increasing group members' learning performance during the on-line collaborative learning process. In turn, systematic application of the VCSF platform enriched with semantic knowledge engineering technologies enables e-learning developers to leverage successful collaborative learning experiences in a software reuse fashion while saving development time and effort. The framework is prototyped and successfully tested in real environments, thus showing the software reuse capability and the collaborative knowledge engineering benefits of the VCSF approach. The research reported in this paper was undertaken within the ALICE project funded through the European 7th Framework Program (FP7).

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Forum Odwodnienie mostów 2013 - opis dyskusji. Cz. I

Bajor M., Nawara E.

Drogi : budownictwo infrastrukturalne

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2014

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Nr 4 (26)

10--21

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Forum ASFALTY 2013. I Ogólnopolskie Forum Specjalistyczne „Asfalty w długowiecznych nawierzchniach drogowych - ASFALTY 2013”

Bajor M., Nawara E., Zygmunt A.

Drogi : budownictwo infrastrukturalne

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2014

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Nr 5 (27)

18--27

PL

W dniach 26 - 27 listopada 2013 r. w Krakowie odbyło się trzecie wydarzenie z zainicjowanego przez Wydawnictwo Czasopism Specjalistycznych Media - Pro Polskie Media Profesjonalne cyklu Konferencje Specjalistyczne nauka-praktyka-biznes. Partnerem spotkania w całości poświęconego tematowi asfaltów drogowych było Polskie Stowarzyszenie Wykonawców Nawierzchni Asfaltowych.

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ASFALTY 2013 - opis dyskusji. I Ogólnopolskie Forum Specjalistyczne „Asfalty w długowiecznych nawierzchniach drogowych - ASFALTY 2013”. Cz. II

Bajor M., Nawara E.

Drogi : budownictwo infrastrukturalne

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2014

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Nr 9 (30)

10--19

PL

W dniach 26-27 listopada 2013 r. w Krakowie odbyło się trzecie wydarzenie z zainicjowanego przez Wydawnictwo Media-Pro Polskie Media Profesjonalne cyklu Konferencje Specjalistyczne nauka-praktyka-biznes. W Drogach 7-8/2014 opublikowaliśmy I część opisu toczącej się podczas spotkania dyskusji. Teraz, tuż przed zaplanowanymi na dni 25-27 listopada 2014 r. Krakowskimi Dniami Nawierzchni 2014, zapraszamy do zapoznania się z drugą częścią materiału.