Selected publications (since 2000):

 

I.                   Books

1.       Nguyen N.T. (2014, Ed.): Transactions on Computational Collective Intelligence XIV. Lecture Notes in Computer Science 8615. Springer

2.       Kowalczyk R., Nguyen N.T. (2014, Ed.): Transactions on Computational Collective Intelligence XVI. Lecture Notes in Computer Science 8780. Springer

3.       Nguyen N.T., Le Thi H.A. (2014, Ed.): Transactions on Computational Collective Intelligence XIII. Lecture Notes in Computer Science 8342. Springer

4.       Badica A., Trawinski B, Nguyen N.T. (2014, Eds): Recent Developments in Computational Collective Intelligence. Springer

5.       Nguyen N.T. (2013, Ed.): Transactions on Computational Collective Intelligence X. Lecture Notes in Computer Science 7776. Springer

6.       Nguyen N.T., Do T.V., Le Thi H.A. (2013, Eds): Advanced Computational Methods for Knowledge Engineering. Springer.

7.       Nguyen N.T. (2013, Ed.): Transactions on Computational Collective Intelligence IX. Lecture Notes in Computer Science 7770. Springer.

8.       Nguyen N.T. et al. (2012, Eds): Advanced Methods for Computational Collective Intelligence. Springer.

9.       Nguyen N.T. (2012, Ed.): Transactions on Computational Collective Intelligence VIII. Lecture Notes in Computer Science 7430. Springer

10.    Nguyen N.T. (2012, Ed.): Transactions on Computational Collective Intelligence VII. Lecture Notes in Computer Science 7270. Springer

11.    Nguyen N.T. (2012, Ed.): Transactions on Computational Collective Intelligence VI. Lecture Notes in Computer Science 7190. Springer

12.    Nguyen N.T. (2011, Ed.): Transactions on Computational Collective Intelligence V. Lecture Notes in Computer Science 6910. Springer

13.    Nguyen N.T. (2011, Ed.): Transactions on Computational Collective Intelligence IV. Lecture Notes in Computer Science 6660. Springer

14.    Katarzyniak R., Chiu T., Hong C., Nguyen N.T. (2011): Semantic Methods for Knowledge Management and Communication. Springer

15.    Nguyen N.T. (2011, Ed.): Transactions on Computational Collective Intelligence III. Lecture Notes in Computer Science 6550. Springer

16.    Nguyen N.T., Trawiński B., Jung J.J. (2011): New Challenges for Intelligent Information and Database Systems. Springer.

17.    Nguyen N.T., Kowalczyk R. (2010, Eds): Transactions on Computational Collective Intelligence II. Lecture Notes in Computer Science 6450. Springer

18.    Nguyen N.T., Kowalczyk R. (2010, Eds): Transactions on Computational Collective Intelligence I. Lecture Notes in Computer Science 6220. Springer

19.    Nguyen N.T., Zgrzywa A., Czyżewski A. (2010, Eds): Advances in Multimedia and Network Information System Technologies. Springer

20.    Nguyen N.T., Katarzyniak R., Chen S.M. (2010, Eds): Advances in Intelligent Information and Database Systems. Springer.

21.    Nguyen N.T., Szczerbicki E. (2010, Eds): Intelligent Systems for Knowledge Management. Springer

22.    Szczerbicki E., Nguyen N.T. (2010, Eds): Smart Information and Knowledge Management: Advances, Challenges, and Critical Issues. Springer

23.    Hakensson A., Hartung R., Nguyen N.T. (2010, Eds): Agent and Multi-agent Technology for Internet and Enterprise Systems. Springer

24.    Nguyen N.T., Katarzyniak R., Janiak A. (2009, Eds): New Challenges in Computational Collective Intelligence. Springer

25.    Nguyen N.T., Jain L.C. (2009, Eds): Intelligent Agents in the Evolution of Web and Applications. Springer

26.    Jain L.C., Nguyen N.T. (2009, Eds): Knowledge Processing and Decision Making in Agent-based Systems. Springer

27.    Nguyen N.T., Katarzyniak R. (2008, Eds): New Challenges in Applied Intelligence Technologies. Springer

28.    Krol D., Nguyen N.T. (2008, Eds.): Intelligence Integration in Distributed Knowledge Management. IGI Global, (former: IDEA Publishers).

29.    Nguyen N.T., Kolaczek G., Gabrys B. (2008, Eds.): Knowledge Processing and Reasoning for Information Society. EXIT Warsaw.

30.    Nguyen N.T. (2008): Advanced Methods for Inconsistent Knowledge Management. Springer London.

31.    Nguyen N.T. (2004, Ed.): Intelligent Technologies for Inconsistent Knowledge Processing. Advanced Knowledge International, Australia.

32.    Danilowicz C., Nguyen N.T., Jankowski L. (2002): Methods for Choice of Representation of Agent Knowledge States in Multi-Agent Systems. Monograph, Wroclaw University of Technology Press.

33.    Nguyen N.T. (2002): Consensus Methods and Their Applications to Solving Conflicts in Distributed Systems. Monograph, Wroclaw University of Technology Press.

 

 

II.                  Proceedings

34.    Hwang D., Jung J.J., Nguyen N.T. (2014, Eds): Computational Collective Intelligence. Proceedings of ICCCI 2014. Lecture Notes in Artificial Intelligence vol. 8733. Springer

35.    Nguyen N.T. et al. (2014, Eds): ): Proceedings of 6th Asian Conference on Intelligent Information and Database Systems. Lecture Notes in Artificial Intelligence vol. 8397, 8398 Springer

36.    Badica C., Nguyen N.T., Brezovan M. (2013, Eds): Computational Collective Intelligence. Proceedings of ICCCI 2013. Lecture Notes in Artificial Intelligence vol. 8083. Springer

37.    Selamat A., Nguyen N.T., Habibollah H. (2013, Eds): Proceedings of 5th Asian Conference on Intelligent Information and Database Systems. Lecture Notes in Artificial Intelligence vol. 7802, 7803 Springer

38.    Nguyen N.T., Hoang K., Jędrzejowicz P. (2012, Eds): Computational Collective Intelligence. Proceedings of ICCCI 2012. Lecture Notes in Artificial Intelligence vol. 7653, 7654. Springer

39.    Jezic, G., Kusek, M., Nguyen, N.T. (2012, Eds): Agent and Multi-agent Systems: Technologies and Applications. Proceedings of KES-AMSTA 2012. Lecture Notes in Artificial Intelligence vol. 7327. Springer

40.    Pan J.S, Chen S.M., Nguyen N.T. (2012, Eds): Proceedings of 4th Asian Conference on Intelligent Information and Database Systems. Lecture Notes in Artificial Intelligence Springer vol. 7196, 7197, 7198.

41.    Jędrzejowicz P., Nguyen N.T., Hoang K. (2011, Eds): Computational Collective Intelligence. Proceedings of ICCCI 2011. Lecture Notes in Artificial Intelligence vol. 6922, 6923. Springer

42.    O’Shea J., Nguyen N.T. et al. (2011, Eds): Agent and Multi-agent Systems: Technologies and Applications. Proceedings of KES-AMSTA 2011. Lecture Notes in Artificial Intelligence vol. 6682. Springer

43.    Nguyen N.T., Kim G.S., Janiak A. (2011, Eds): Proceedings of 3rd Asian Conference on Intelligent Information and Database Systems. Lecture Notes in Artificial Intelligence vol. 6591, 6592 Springer

44.    Pan J.S, Chen S.M., Nguyen N.T. (2010, Eds): Computational Collective Intelligence. Proceedings of ICCCI 2010. Lecture Notes in Artificial Intelligence vol. 6421, 6422, 6423. Springer

45.    Jędrzejowicz P., Nguyen N.T. et al. (2010, Eds): Agent and Multi-agent Systems: Technologies and Applications. Proceedings of KES-AMSTA 2010. Lecture Notes in Artificial Intelligence vol. 6070, 6071. Springer

46.    Nguyen N.T., Le M.T., Świątek J. (2010, Eds): Proceedings of 2nd Asian Conference on Intelligent Information and Database Systems. Lecture Notes in Artificial Intelligence vol. 5990, 5991 Springer

47.    Nguyen N.T., Kowalczyk R., Chen S.M. (2009, Eds): Computational Collective Intelligence: Multiagent Systems, Social Networks and Semantic Web. Proceedings of ICCCI 2009.
Lecture Notes in Artificial Intelligence 5796. Springer.

48.    Nguyen N.T., Nguyen H.P., Grzech A. (2009, Eds): Proceedings of 1st Asian Conference on Intelligent Information and Database Systems. IEEE Computer Society.

49.    Hakanson A., Nguyen N.T. et al. (2009, Eds): Agent and Multi-agent Systems: Technologies and Applications. Proceedings of KES-AMSTA 2009. Lecture Notes in Artificial Intelligence 5559. Springer

50.    Nguyen N.T. et al. (2009) : 1st International Conference on Knowledge Systems Engineering (KSE 2009). Proceedings. IEEE Computer Society 2009.

51.    Nguyen N.T. et al. (2008, Eds): New Frontiers in Applied Artificial Intelligence. Proceedings of IEA-AIE 2008. Lecture Notes in Artificial Intelligence 5027. Springer.s

52.    Nguyen N.T. et al. (2008, Eds): Agent and Multi-agent Systems: Technologies and Applications. Proceedings of KES-AMSTA 2008. Lecture Notes in Artificial Intelligence 4953. Springer.

53.    Nguyen N.T. et al. (2007, Eds): Agent and Multi-agent Systems: Technologies and Applications. Proceedings of KES-AMSTA 2007. Lecture Notes in Artificial Intelligence 4496. Springer.

54.    Na J.Y., Ko F., Lee J., Truex D.P., Sohn S., Nguyen N.T. (2007, Eds): Proceedings of International Conference on Convergence Information Technology (ICCIT 2007). IEEE Computer Society.

55.    Granville B., Kutti N.S., Missikoff M., Nguyen N.T. (2007, Eds): Proceedings of International Conference on Enterprise Information Systems and Web Technologies (EISWT-07), Orlando, Florida, USA.

56.    Butz C., Nguyen N.T., Takama Y. (2006, Eds.): IEEE/ACM/WI/IAT Workshops Proceedings. IEEE Computer Society.

 

 

III.                  Special issues for journals

57.    Nguyen N.T. (2014): Computational Collective Intelligence. Journal of Intelligent and Fuzzy Systems 27(2)

58.    Nguyen N.T., Jędrzejowicz P., Lee G. (2011): Advances in Intelligent and Autonomous Systems. Neurocomputing 88.

59.    Szczerbicki E., Jędrzejowicz P., Nguyen N.T. (2011): Knowledge Processing Methodologies in Intelligent Autonomous Systems. Cybernetics and Systems 42(5)

60.    Jung J.J., Nguyen N.T., Ou C.M., Kim C.G. (2010, Eds): Advances on agent-based network management. Journal of Network and Computer Applications 33(6)

61.    Jung J.J., Nguyen N.T., (2010, Eds): Virtual Agent and Organization Modeling: Theory and Applications. Information Sciences 180(17)

62.    Nguyen N.T., Katarzyniak R., Janiak A. (2010, Eds): Applied Intelligent Information Systems. Applied Intelligence 32(2)

63.    Jung J.J., Ou C.M., Nguyen N.T. et al. (2010, Eds): Advances on agent-based network management. Journal of Network and Computer Applications 33(5)

64.    Szczerbicki E., Nguyen N.T. (2010): Applied Intelligence and Knowledge-Based Systems: Challenges, Approaches, and Case Studies – Part 2 . Cybernetics and Systems 41(1)

65.    Katarzyniak R., Nguyen N.T., Hong T.P. (2010): Special Issue on Knowledge and Information Discovery in New Generation Systems. New Generation Computing 28(1)

66.    Król D., Nguyen N.T. (2010): Knowledge Integration and Management in Autonomous Systems. Journal of Intelligent & Fuzzy Systems 21(3)

67.    Nguyen N.T. et al. (2009): Knowledge Management for Information Systems. Special issue for Journal of Universal Computer Science 15(13)

68.    Szczerbicki E., Nguyen N.T. (2009): Applied Intelligence and Knowledge-Based Systems: Challenges, Approaches, and Case Studies – Part 1 . Cybernetics and Systems 40(8)

69.    Nguyen N.T, Huang D.S. (2009): Knowledge Management for Autonomous Systems and Computational Intelligence. Journal of Universal Computer Science 15(4)

70.    Nguyen N.T. et al. (2009): Theoretical Advances of Intelligent Paradigms. Special issue for Journal of Intelligent and Fuzzy Systems 20(1-2).

71.    Nguyen N.T., Katarzyniak R. (2009): Actions and Social Interactions in Multi-agent Systems. Special issue for International Journal of Knowledge and Information Systems 18(2)

72.    Szczerbicki E., Nguyen N.T. (2009): Applied Intelligent Systems. Special issue in Cybernetics and Systems 40(2)

73.    Cao L.B.,, Nguyen N.T. (2008, Eds): Knowledge Processing in Intelligent Systems. Special issue in Journal of Universal Computer Science 14(14)

74.    Nguyen N.T., Sobecki J. (2008, Eds): Agent Mobile Software. Special issue in International Journal of Software Engineering and Knowledge Engineering 18(5)

75.    Jain L.C., Lim C.P., Nguyen N.T. (2008): Recent Advances in Intelligent Paradigms Fusion and Their Applications. Special issue in International Journal of Hybrid Intelligent Systems 5(3)

76.    Lim C.P., Jain L.C., Nguyen N.T., Balas V.E. (2008): Advances in Computational Intelligence Paradigms and Applications. Special issue in Fuzzy Optimization and Decision Making 7(3)

77.    Szczerbicki E., Nguyen N.T. (2008): Information and Knowledge Engineering for Intelligent Systems. Part I. Special issue in Cybernetics and Systems 39(6)

78.    Szczerbicki E., Nguyen N.T. (2008): Information and Knowledge Engineering for Intelligent Systems. Part II. Special issue in Cybernetics and Systems 39(7)

79.    Jung J.J., Nguyen N.T. (2008): Collective Intelligence for Semantic and Knowledge Grid. Special issue in Journal of Universal Computer Science 14(7).

80.    Grzech A., Katarzyniak R., Nguyen N.T. (2007): Knowledge Management in Computer Communication Systems. Special issue in Computing and Informatics 26(5).

81.    Nguyen N.T., Nishida T. (2007): Communicative Intelligence. Special issue in  Journal of Universal Computer Science 13(2).

82.    Nguyen N.T. (2006): Web-based Recommender Systems. Special issue in International Journal of  Computer Science & Applications 3(3)

83.    Nguyen N.T., Katarzyniak R. (2006): Multi-agent Systems, Ontologies and Conflict Resolution. Special issue in Journal of Intelligent & Fuzzy Systems 17(3)

84.    Nguyen N.T., Sobecki J. (2005): Modern Technologies for Web-based Adaptive Systems. Special issue in Journal of Universal Computer Science 11(2).

 

 

image009.jpg

cda_displayimage.jpg

IGI.jpg

CCI-1.jpg

CCI.jpg

image007.jpg

image011.jpg

MISSI.jpg

image015.jpg

SCI-1.jpg

 

 

IV.                 Book chapters

85.    Tien V.D., Krejczinger T., Laclavik M., Le N.T., Maleszka M., Nguyen G., Nguyen N.T. (2013): An Application of Computational Collective Intelligence to Governance and Policy Modelling. In: Nguyen N.T. et al. (eds), Advanced Computational Methods for Knowledge Engineering. Springer 2013, 237-249.

86.    Kozierkiewicz-Hetmańska A., Nguyen N.T. (2013): A Framework for Building Intelligent Tutoring Systems. In: Nguyen N.T. et al. (eds), Advanced Computational Methods for Knowledge Engineering. Springer 2013, 251-265.

87.    Pietranik M., Nguyen N.T. (2012): A Multi-attribute and Logic-Based Framework of Ontology Alignment. In: Zgrzywa A. (ed.), Multimedia and Internet Systems: Theory and Practice. Springer 2012, 99-108.

88.    Duong T.H., Nguyen N.T. et al. (2011): Fuzzy Ontology Integration Using Consensus to Solve Conflicts on Concept Level. In: Nguyen N.T. et al., New Challenges for Intelligent Information and Database Systems. Springer 2011, 33-42.

89.    Kozierkiewicz-Hetmańska A., Nguyen N.T. (2010): A Method for Scenario Modification in Intelligent E-Learning Systems Using Graph-Based Structure of Knowledge. In: Nguyen N.T. et al. (Eds), Advances in Intelligent Information and Database Systems. Springer, 169-179.

90.    Duong T.H., Nguyen N.T., Jo G.S. (2010): Effective Backbone Techniques for Ontology Integration. In: Nguyen N.T., Szczerbicki E. (Eds): Intelligent Systems for Knowledge Management. Springer, 197-227.

91.    Jain L.C., Lim C.P., Nguyen N.T. (2009): Innovations in Knowledge Processing and Decision Making in Agent-Based Systems. In: Jain L.C., Nguyen N.T. (Eds), Knowledge Processing and Decision Making in Agent-based Systems. Springer 2009, 1-12.

92.    Nguyen N.T. (2006): Using Consensus Methodology in Processing Inconsistency of Knowledge. In: Last M. et al. (Eds): Advances in Web Intelligence and Data Mining, series Studies in Computational Intelligence, pp. 161-170 (Springer).

93.    Nguyen N.T. (2005): Modal Time and Processing its Inconsistency in Temporal Data Collections. In: R. Katarzyniak (Ed.), Ontologies and Soft Methods in Knowledge Management, pp. 101-119. Advanced Knowledge International, Adelaide, Australia.

94.    Gawiniecki M., Gordon M., Nguyen N.T., Paprzycki M., Ventulani Z. (2005): Ontologically Demarcated Resources in an agent Based Travel Support System. In: R. Katarzyniak (Ed.), Ontologies and Soft Methods in Knowledge Management, pp. 219-240. Advanced Knowledge International, Adelaide, Australia.

95.    Nguyen N.T. (2004): Consensus methodology for Inconsistent Knowledge Processing. In: Nguyen N.T. (Ed.), Intelligent Technologies for Inconsistent Knowledge Processing, pp. 3-20. Advanced Knowledge International, Adelaide, Australia.

96.    Hernes M., Nguyen N.T. (2004): Deriving consensus for incomplete ordered partitions. In: Nguyen N.T. (Ed.), Intelligent Technologies for Inconsistent Knowledge Processing, pp. 39-56. Advanced Knowledge International, Adelaide, Australia.

97.    Zgrzywa M., Nguyen N.T. (2004): Determining consensus with simple dependencies of attributes. In: Nguyen N.T. (Ed.), Intelligent Technologies for Inconsistent Knowledge Processing, pp. 57-72. Advanced Knowledge International, Adelaide, Australia.

98.    Malowiecki M., Nguyen N.T. (2004): Consistency functions for reconciling knowledge inconsistency. In: Nguyen N.T. (Ed.), Intelligent Technologies for Inconsistent Knowledge Processing, pp. 73-92. Advanced Knowledge International, Adelaide, Australia.

99.    Krol D., Nguyen N.T. (2004): Migration mechanisms for multi-class objects in distributed systems. In: Nguyen N.T. (Ed.), Intelligent Technologies for Inconsistent Knowledge Processing, pp. 239-254. Advanced Knowledge International, Adelaide, Australia.

100. Nguyen N.T. (2003): Criteria for consensus susceptibility in conflicts resolving. In Inuiguchi M., Tsumoto S., Hirano S. (eds): Rough Set Theory and Granular Computing. Series Studies in Fuzziness and Soft Computing vol. 125, 323-333 (Springer).

101. Danilowicz C., Nguyen H.C., Nguyen N.T. (2003): Model of user profiles and personalization for web-based information retrieval systems. In Abramowicz W. (Ed.), Knowledge Based Information Retrieval and Filtering from Internet, Kluwer Academic Publisher, 121-136.

102. Sobecki J., Nguyen N.T. (2002): Using consensus methods to user classification in interactive systems. In: Grzegorzewski P. et al. (eds) Soft methods in probability, statistics and data, Advances in Soft Computing, Physica 346-354.

103. Nguyen N.T. (2001): Susceptibility to consensus of conflict profiles. Lecture Notes in Artificial Intelligence 2253, 317-332.

104. Nguyen N.T., Kisielewicz K. (2000), The model of temporal databases with modal time. In: Zupancic J. et al. (eds), Evolution and challenges in systems development, Kluwer Academic Publisher, NY, 261-291.

 

V.              Journal papers

105. Maleszka M., Nguyen N.T. (2015): Integration Computing and Collective Intelligence. Expert Systems With Applications 42, 332-340

106. Duong T.H, Nguyen N.T. et al. (2015): A Collaborative Algorithm for Semantic Video Annotation Using a Consensus-based Social Network Analysis. Expert Systems With Applications 42, 246-258

107. Nguyen V.D., Nguyen N.T. (2014): A method for temporal knowledge integration using indeterminate valid time. Journal of Intelligent & Fuzzy Systems 27(2): 667-677

108. Pietranik M., Nguyen N.T. (2014): A Multi-atrribute based Framework for Ontology Aligning. Neurocomputing 146, 276-290.

109. Duong T.H., Nguyen N.T. et.al (2014): Comparative Analysis of Text Representation Methods Using Classification. Cybernetics and Systems 45(2), 146-164

110. Pham X.H., Jung J.J., Nguyen N.T. (2014): <A,V>-Spear: A New Method for Expert-Based Recommendation Systems. Cybernetics and Systems 45(2), 165-179.

111. Maleszka M., Mianowska B., Nguyen N.T. (2013): A Method for Collaborative Recommendation Using Knowledge Integration Tools and Hierarchical Structure of User Profiles. Knowledge-Based Systems 47, 1-13

112. Pham X.H., Jung J.J., Nguyen N.T. (2013): Integrating Multiple Experts for Correction Process in Interactive Recommendation Systems. Journal of Universal Computer Science 19(4), 581-599

113. Kern R., Stolarczyk T., Nguyen N.T. (2013): A Formal Framework for Query Decomposition and Knowledge Integration in Data Warehouse Federations. Expert Systems with Applications 40(7), 2592–2606.

114. Nguyen V.D., Nguyen N.T. (2013): A Method for Temporal Knowledge Integration Using Indeterminate Model of Time. Cybernetics and Systems 44(2-3), 222-244.

115. Udin N.M., Duong T.H, Nguyen N.T. et al (2013): Semantic Similarity Measures for Enhancing Information Retrieval in Folksonomies. Expert Systems with Applications 40(5), 1645–1653.

116. Truong H.B., Duong, T.H., Nguyen N.T. (2013): A Hybrid Method for Fuzzy Ontology Integration. Cybernetics and Systems 44(2-3), 133-154.

117. Mianowska B., Nguyen N.T. (2013): Tuning User Profiles Based on Analyzing Dynamic Preference in Document Retrieval Systems. Multimedia Tools and Applications 65(1), 93-118.

118. Tran T.H., Nguyen N.T. (2013): Axiomatic Characterization of Belief Merging by Negotiation. Multimedia Tools and Applications 65(1), 133-159

119. Maleszka M. Nguyen N.T. (2012): Approximate Algorithms for Solving O1 Consensus Problems Using Complex Tree Structure. Transactions on Computational Collective Intelligence 8, 214-227

120. Pietranik M., Nguyen N.T. (2012): A Method for Ontology Alignment Based Attribute Semantics. Cybernetics and Systems 43(4), 319-339.

121. Mianowska B., Nguyen N.T. (2011): Using Knowledge Integration Techniques for User Profile Adaptation Method in Document Retrieval Systems. Transactions on Computational Collective Intelligence, Vol. 5, 140-156.

122. Maleszka M., Nguyen N.T. (2011): A Method for Complex Hierarchical Data Integration. Cybernetics and Systems 42(5), 357-378.

123. Kozierkiewicz-Hetmańska A., Nguyen N.T. (2011): A Method for Learning Scenario Determination and Modification in Intelligent Tutoring Systems. International Journal of Applied Mathematics and Computer Science 21(1), 69-82.

124. Hwang D., Nguyen N.T. et al (2010): A Semantic Wiki Framework for Reconciling Conflict Collaborations Based on Selecting Consensus Choice. Journal of Universal Computer Science 16(7), 1024-1035.

125. Duong T.H., Nguyen N.T., Jo G.S. (2010): Constructing and Mining: A Semantic-Based Academic Social Network. Journal of Intelligent & Fuzzy Systems 21(3), 197-207.

126. Nguyen N.T. (2009): Processing Inconsistency of Knowledge in Determining Knowledge of a Collective. Cybernetics and Systems 40(8), 670-688.

127. Nguyen N.T. (2009): Rough Classification Method – New Approach and Applications. Journal of Universal Computer Science 15(13), 2622-2628.

128. Duong T.H., Jo G.S., Jung J.J., Nguyen N.T. (2009): Complexity Analysis of Ontology Integration Methodologies: A Comparative Study. Journal of Universal Computer Science 15(4), 877-897.

129. Kiewra M., Nguyen N.T. (2009): A Fuzzy-based Method for Improving Recall Values in Recommender Systems. Journal of Intelligent & Fuzzy Systems 20(1-2), 89-104.

130. Duong T.H., Nguyen N.T., Jo G.S. (2009): A Hybrid Method for Integrating Multiple Ontologies Cybernetics and Systems 40(2), 123-145. Most cited in 2009-2011

131. Nguyen N.T., Katarzyniak R. (2009): Actions and social interactions in multi-agent systems. International Journal of Knowledge and Information Systems 18(2), 133-136

132. Cao L.B., Nguyen N.T. (2008): Intelligence Metasynthesis and Knowledge Processing in Intelligent Systems. Journal of Universal Computer Science 14(14), 256-262.

133. Nguyen N.T. (2008): Inconsistency of Knowledge and Collective Intelligence. Cybernetics and Systems 39(6), 542-562. Most cited in 2008-2010

134. Jung J.J., Nguyen N.T. (2008): Collective Intelligence for Semantic and Knowledge Grid. Journal of Universal Computer Science 14(7), 1016-1020.

135. Nguyen N.T., Nishida T. (2007): Communicative Intelligence. Journal of Universal Computer Science 13(2), 133-134.

136. Grzech A., Katarzyniak R., Nguyen N.T. (2007): Knowledge and information management in computer communication systems. Computing and Informatics 26(5), 465-467.

137. Nguyen N.T. (2007): A Method for Ontology Conflict Resolution and Integration on Relation Level. Cybernetics and Systems 38(8), 781-797.

138. Jung J.J., Juszczyszyn K., Nguyen N.T. (2007): Centrality Measurement on Semantically Multiplex Social Networks: Divide-and-Conquer Approach. International Journal of Intelligent Information and Database Systems 1(3-4), 277-292.

139. Sliwko L, Nguyen N.T. (2007): Using Multi-agent Systems and Consensus Methods for Information Retrieval in Internet. International Journal of Intelligent Information and Database Systems 1(2), 181-198.

140. Hernes M. Nguyen N.T. (2007): Deriving Consensus for Hierarchical Incomplete Ordered Partitions and Coverings. Journal of Universal Computer Science 13(2), 317-328.

141. Nguyen N.T., Sobecki J. (2006): Determination of User Interfaces in Adaptive Systems Using a Rough Classification based Method. New Generation Computing 24(4), 377-402

142. Nguyen N.T. (2006): Methods for Achieving Susceptibility to Consensus for Conflict Profiles. Journal of Intelligent & Fuzzy Systems 17(3), 219-229

143. Nguyen N.T., Katarzyniak R. (2006): Multi-agent Systems, Ontologies and Conflict Resolution. Journal of Intelligent & Fuzzy Systems 17(3), 189-190

144. Nguyen N.T. (2005): Processing Inconsistency of Knowledge on Semantic Level. Journal of Universal Computer Science 11(2), 285-302.

145. Nguyen N.T., Sobecki J. (2005): Modern Technologies for Web-based Adaptive Systems. Journal of Universal Computer Science 11(2), 210-212.

146. Kukla E., Nguyen N.T., Sobecki J., Danilowicz C., Lenar M. (2004): A model conception for learner profile construction and determination of optimal scenario in intelligent learning systems. ITSE - International Journal of Interactive Technology and Smart Education 1(3), 171-184.

147. Nguyen N.T., Malowiecki M. (2004): Consistency measures for conflict profiles. LNCS Transactions on Rough Sets 1, 169-186 (Springer).

148. Danilowicz C., Nguyen N.T. (2003): Consensus methods for solving inconsistency of replicated data in distributed systems. Distributed and Parallel Databases – An International Journal 14(1), 53-69.

149. Nguyen N.T., Sobecki J. (2003): Using Consensus Methods to Construct Adaptive Interfaces in Multimodal Web-based Systems. Journal of Universal Access in the Information Society 2(4), 342-358.

150. Nguyen N.T. (2002): Consensus systems for conflict solving in distributed systems. Information Sciences 147(1-4), 91-122.

151. Kukla E., Nguyen N.T., Sobecki J. (2002): The consensus-based tutoring strategy selection in CAL systems. World Transactions on Engineering and Technology Education 1(1), 95-99.

152. Nguyen N.T. (2001): Consensus-based timestamps in distributed temporal databases. The Computer Journal 44(5), 398-409.

153. Nguyen N.T. (2001): Using distance functions to solve representation choice problems. Fundamenta Informaticae 48(4), 295-314.

154. Nguyen N.T. (2001): Susceptibility to Consensus of Conflict Profiles in Consensus Systems. Bulletin of International Rough Sets Society 5(1/2), 217-224.

155. Nguyen N.T.(2001): Consensus-based methods for solving conflicts of data semantics in distributed database systems. Advances in Modeling & Analysis D 6(4), 2001, 29-42.

156. Nguyen N.T. (2001): Using consensus methods for resolving conflicts in intelligent distributed systems. Vivek - A Quarterly in Artificial Intelligence 14(2), 2-11.

157. Katarzyniak R., Nguyen N.T. (2000): Reconciling inconsistent profiles of agents’ knowledge states in distributed multi-agent systems using consensus methods. System Science 26(4), 93-119.

 

VI.             Refereed major conference papers

158. Maleszka B., Nguyen N.T. (2014): Evaluating Profile Convergence in Document Retrieval Systems. In: Proc. of ACIIDS 2014. , Lecture Notes in Artificial Intelligence 8397, 163-172

159. Nguyen N.T. (2013): Integration Computing and Collective Intelligence. Keynote Speech. In: Proc. of IDC 2013, 1-3

160. Pietranik M., Nguyen N.T. (2013): Preliminary Experimental Results of the Multi-attribute and Logic-Based Ontology Alignment Method. In: Proc. of ICCCI 2013, Lecture Notes in Artificial Intelligence 8083, 225-234

161. Nguyen V.D., Nguyen N.T. (2013): A Method for Knowledge Integration Using Indeterminate Model of Time with Criterion O2. In: Proc. of KES-AMSTA 2013, 325-334

162. Maleszka M., Nguyen N.T. (2013): Using Subtree Agreement for Complex Tree Integration Tasks. In: Proc. of ACIIDS 2013. Lecture Notes in Artificial Intelligence 7803, 148-157.

163. Mianowska. B., Nguyen N.T. (2013): A Method for Collaborative Recommendation in Document Retrieval Systems. In: Proc. of ACIIDS 2013. Lecture Notes in Artificial Intelligence 7803, 168-177

164. Maleszka M., Mianowska B., Nguyen N.T. (2012): A Heuristic Method for Collaborative Recommendation Using Hierarchical User Profiles. In: Proc. of ICCCI 2012. Lecture Notes in Artificial Intelligence 7653, 11-20.

165. Pham X.H., Jung J.J., Nguyen N.Y. (2012): Integrating Multiple Experts for Correction Process in Interactive Recommendation Systems. In: Proc. of ICCCI 2012. Lecture Notes in Artificial Intelligence 7653, 31-40.

166. Pietranik M., Nguyen N.T. (2012): Ontology Relation Alignment Based on Attribute Semantics. In: Proc. of ICCCI 2012. Lecture Notes in Artificial Intelligence 7654, 49-58.

167. Kozierkiewicz-Hetmańska A., Nguyen N.T. (2012): A Comparison Analysis of Consensus Determining Using One and Two-level Methods. In: Proc. of KES 2012. Frontiers in Artificial Intelligence and Applications 243 IOS Press 2012, 159-168

168. Mianowska. B., Maleszka M., Nguyen N.T. (2012): A Framework for Data Warehouse Federations Building. In: Proceedings of IEEE SMC 2012. IEEE Computer Society, 2891-2896.

169. Maleszka M., Nguyen N.T. (2012): Path-oriented Integration Method for Complex Trees. In: Proceedings of KES-AMSTA 2012. Notes in Artificial Intelligence 7327, 156-166.

170. Mianowska. B., Nguyen N.T. (2012): A Method for Tuning User Profiles Based on Analysis of User Preference Dynamics in Document Retrieval Systems. In: Proceedings of ICAISC 2012. Lecture Notes in Artificial Intelligence 7267, 673-681

171. Truong H.B., Nguyen N.T. (2012): A Multi-attribute and Multi-valued Model for Fuzzy Ontology Integration on Instance Level. In: Proceedings of ACIIDS 2012. Lecture Notes in Artificial Intelligence 7196, 187-197.

172. Duong T.H., Truong H.B., Nguyen N.T. (2012): Local Neighbour Enrichment for Ontology Integration. In: Proceedings of ACIIDS 2012. Lecture Notes in Artificial Intelligence 7196, 156-166.

173. Pietranik M., Nguyen N.T. (2011): A Distance Function for Ontology Concepts Using Extension of Attributes’ Semantics. In: Proceedings of ICCCI 2011. Lecture Notes in Artificial Intelligence 6922, 623-632.

174. Maleszka. M., Nguyen N.T. (2011): Some Properties of Complex Tree Integration Criteria. In: Proceedings of ICCCI 2011. Lecture Notes in Artificial Intelligence 6923, 1-9.

175. Kern R., Ryk K., Nguyen N.T. (2011): A Framework for Building Logical Schema and Query Decomposition in Data Warehouse Federations. In: Proceedings of ICCCI 2011. Lecture Notes in Artificial Intelligence 6922, 612-622.

176. Truong H.B., Nguyen N.T. (2011): A Framework of An Effective Fuzzy Ontology Alignment Technique. In: Proceedings of IEEE SMC 2011, 931-935. IEEE Computer Society.

177. Pietranik M., Nguyen N.T. (2011): Semantic Distance Measure between Ontology Concept’s Attributes. In: Proceedings of KES 2011. Lecture Notes in Artificial Intelligence 6881, 210-219.

178. Mianowska. B., Nguyen N.T. (2011): A Method of User Modeling and Relevance Simulation in Document Retrieval Systems. In: Proc. of KES-AMSTA 2011. Lecture Notes in Artificial Intelligence 6682, 138-147

179. Truong H.B., Nguyen N.T., Nguyen P.K. (2011): Fuzzy ontology building and integration for fuzzy inference systems in weather forecast domain.. In: Proceedings of ACIIDS 2011. Lecture Notes in Artificial Intelligence 6591, 517-527.

180. Pietranik M., Nguyen N.T. (2011): Attribute mapping as a foundation of ontology alignment. In: Proceedings of ACIIDS 2011. Lecture Notes in Artificial Intelligence 6591, 455-465

181. Mianowska. B., Nguyen N.T. (2011): A method for user profile adaptation in document retrieval.. In: Proceedings of ACIIDS 2011. Lecture Notes in Artificial Intelligence 6592, 181-192.

182. Maleszka. M., Nguyen N.T. (2011): A model for Complex Tree integration tasks. In: Proceedings of ACIIDS 2011. Lecture Notes in Artificial Intelligence 6591, 36-66.

183. Pham X.H., Nguyen N.T., Jung J.J. (2010): Towards Rough Set-based User Modeling for Recommendation Systems. In Proceedings of InTech’10. ACM, 75-80.

184. Nguyen N.T., Truong H.B. (2010): Consensus-based Method for Fuzzy Ontology Integration. In: Proceedings of ICCCI 2010. In: Proceedings of ICCCI 2010. Lecture Notes in Artificial Intelligence 6422, 480-489.

185. Kozierkiewicz A., Nguyen N.T. (2010): A Computer Adaptive Testing Method for Intelligent Tutoring Systems. In: Proceedings of KES 2010. Lecture Notes in Artificial Intelligence 6276, 281-289

186. Duong T.H., Nguyen N.T., Jo G.S. (2010): Fuzzy Ontology Integration Using Consensus Method. In: Proceedings of ICHIT 2010. ACM, 96-99.

187. Mianowska B., Nguyen N.T. (2010): A Framework of an Agent-based Personal Assistant for Internet Users. In: Proceedings of KES-AMSTA 2010. Lecture Notes in Artificial Intelligence 6070, 163-172.

188. Tran T.H., Nguyen N.T. (2009): A Consensus-based Integration Method for Security Rules. In: Proceedings of KES 2009. Lecture Notes in Artificial Intelligence 5711, 54-61.

189. Jung J.J., Nguyen N.T. (2009): Consensus Choice for Reconciling Social Collaborations on Semantic Wikis. In: Proceedings of ICCCI 2009, Lecture Notes in Artificial Intelligence 5796, 472-480.

190. Maleszka M., Mianowska A., Nguyen N.T. (2009): Agent Technology for Information Retrieval in Internet. In: Proceedings of KES-AMSTA 2009, Lecture Notes in Artificial Intelligence 5559, 151-162.

191. Tran T.H., Nguyen N.T. (2009): Security Policy Integration Method for Information Systems. In: Nguyen NT et al, Proceedings of ACIIDS 2009. IEEE Computer Society Press, 223-225.

192. Nguyen N.T. (2008): Computational Collective Intelligence and Knowledge Inconsistency in Multi-agent Environments. In: Proceedings of PRIMA 2008. Lecture Notes in Artificial Intelligence 5357, 2-3 (Keynote Speech).

193. Duong T.H., Nguyen N.T., Jo G.S. (2008): A Method for Integration across Text Corpus and WordNet-based Ontologies. In: IEEE/ACM/WI/IAT 2008 Workshops Proceedings, 1-4. IEEE Computer Society 2008.

194. Tran T.H., Nguyen N.T. (2008): Integration of Knowledge in Disjunctive Structure on Semantic Level. In: Proceedings of KES 2008. Lecture Notes in Artificial Intelligence 5177, 253-262.

195. Duong T.H., Nguyen N.T., Jo G.S. (2008): A Method for Integration of WordNet-based Ontologies Using Distance Measures. In: Proceedings of KES 2008. Lecture Notes in Artificial Intelligence 5177, 210-219.

196. Tran T.H., Nguyen N.T. (2008): An Algorithm for Agent Knowledge Integration Using Conjunctive and Disjunctive Structures, Lecture Notes in Artificial Intelligence 4953, 692-701

197. Katarzyniak P.R., Nguyen N.T., Jain L.C. (2008): A Model for Fuzzy Grounding of Modal Conjunctions in Artificial Cognitive Agents. Lecture Notes in Artificial Intelligence 4953, 339-348.

198. Nguyen N.T. (2007): A Method for Integration of Knowledge Using Fuzzy Structure. In: IEEE/ACM/WI/IAT 2007 Workshops Proceedings, 11-14. IEEE Computer Society.

199. Katarzyniak P.R., Nguyen N.T., Jain L.C. (2007): Soft Computing Approach to Contextual Determination of Grounding Sets for Simple Modalities. In: Proceedings of KES 2007, Lecture Notes in Artificial Intelligence 4692, 230-237.

200. Nguyen N.T., Rakowski M., Rusin M., Sobecki J. (2007): Hybrid Filtering Methods Applied in Web-based Movie Recommendation System. In: Proceedings of KES 2007, Lecture Notes in Artificial Intelligence 4692, 206-213.

201. Kozierkiewicz A., Nguyen N.T. (2007): The Statistical Verification of Rough Classification Algorithms. In: Proceedings of KES 2007, Lecture Notes in Artificial Intelligence 4692, 238-245.

202. Kiewra M., Nguyen N.T. (2007): AdaptRank: A Hybrid Method for Improving Recommendation Recall. In: Proc. of IEA-AIE 2007. Lecture Notes in Artificial Intelligence 4570, 1061-1071.

203. Nguyen N.T., Rusin M. (2006): A consensus-based approach for ontology integration. In: IEEE/ACM/WI/IAT 2006 Workshops Proceedings. IEEE Computer Society, pp. 514-517.

204. Nguyen N.T. (2006): Conflicts of Ontologies – Classification and Consensus-based Methods for Resolving. In: Proceedings of KES 2006, Lecture Notes in Artificial Intelligence 4252, 267-274.

205. Aftarczuk K., Kozierkiewicz A., Nguyen N.T. (2006): Using Representation Choice Methods for a Medical Diagnosis Problem. In: Proceedings of KES 2006, Lecture Notes in Artificial Intelligence 4253, 805-812.

206. Juszczyszyn K., Nguyen N.T., Kolaczek G., Grzech A., Kuchtiak-Pieczynska A., Katarzynak R. (2006): Agent-based Approach for Distributed Intrusion Detection System Design. In: Proceedings of ICCS 2006, Lecture Notes in Computer Science 3993, 208-215.

207. Nguyen N.T., Gandza M., Paprzycki M. (2006): A Consensus-based Multi-agent Approach for Information Retrieval in Internet. In: Proceedings of ICCS 2006, Lecture Notes in Computer Science 3993, 224-231.

208. Kolaczek G., Kuchtiak-Pieczynska A., Juszczyszyn K., Grzech A., Katarzynak R., Nguyen N.T. (2005): A Mobile Agent Approach to Intrusion Detection in Network Systems. In: Proceedings of KES 2005, Lecture Notes in Artificial Intelligence 3682, 514-519.

209. Kiewra M., Nguyen N.T. (2005): Non–textual Document Ranking Using Crawler Information and Web Usage Mining. In: Proceedings of KES 2005, Lecture Notes in Artificial Intelligence 3682, 520-526.

210. Nguyen N.T., Sobecki J. (2005): Rough Classification Used for Learning Scenario Determination in Intelligent Learning Systems. In: Proceedings of IIS’05, Advances in Soft Computing, 107-116 (Springer).

211. Nguyen N.T., Malowiecki M. (2005): Using Consensus Susceptibility and Consistency Measures for Inconsistent Knowledge Management. In: Proceedings of PAKDD’05, Lecture Notes in Artificial Intelligence 3518, 545-554.

212. Zgrzywa M., Nguyen N.T. (2005): Estimating and Calculating Consensus with Simple Dependencies of Attributes .In: Proceedings of CORES’05, Advances in Soft Computing, pp. 320-329 (Springer)

213. Nguyen N.T., Blazowski A., Malowiecki M. (2005): A Multiagent System Aiding Information Retrieval in Internet Using Consensus Methods. In: Proceedings of SOFSEM 2005. Lecture Notes in Computer Science 3381, 399-403.

214. Malowiecki M, Nguyen N.T. (2004): Consistency Measures and Consensus Susceptibility for Conflict Profiles. In: Proceedings of 15th International Conference on System Science, pp. 173-180. Wroclaw Univ. Tech. Press.

215. Nguyen N.T., Ma³owiecki M. (2004): Deriving Consensus for Conflict Situations with Respect to its Susceptibility. In: Proceedings of KES 2004, Wellington New Zealand, Lecture Notes in Artificial Intelligence 3214, 1179-1186.

216. Sobecki J., Nguyen N.T., Malowiecki M. (2004): Adaptive User Interfaces Modeling by Means of Rough Classification Methods and Consistency Measures. In: Proceedings of First International Workshop on Advanced Technologies for E-Learning and E-Science, pp. 16-22. IEEE Computer Society Press.

217. Malowiecki M, Nguyen N.T., Zgrzywa M. (2004): Using Consistency Measures and Attribute Dependencies for Solving Conflicts in Adaptive Systems. In: Proceedings of ICCS 2004, Krakow, Poland, Lecture Notes in Computer Science 3038, 537-545.

218. Sobecki J., Nguyen N.T., Danilowicz C. (2004): Adaptive user interface constructing using consensus methods. In: Proceedings of HERCMA’2003, Athens, Greece, September 2003, pp. 208-215.

219. Kukla E., Nguyen N.T., Danilowicz C. (2004): Reconciling inconsistency in selection of optimal strategy in multimedia intelligent tutorial systems. In: Proceedings of HERCMA’2003, Athens, Greece, September 2003, pp. 216-225.

220. Nguyen N.T., Danilowicz C. (2004): Methods for Reducing the Number of Representatives in Representation Choice Tasks. In: Proceedings of IEA-AIE 2004, Ottawa, Canada, Lecture Notes in Artificial Intelligence 3029, 154-163.

221. Kukla E., Nguyen N.T., Sobecki J., Danilowicz C., Lenar M. (2004): Determination of Learning Scenarios in Intelligent Web-based Learning Environment. In: Proceedings of IEA-AIE 2004, Ottawa, Canada, Lecture Notes in Artificial Intelligence 3029, 759-768.

222. Nguyen N.T., Sobecki J. (2003): Consensus versus Conflicts – Methodology and Applications. In: Proceedings of RSFDGrC 2003, Lecture Notes in Artificial Intelligence 2639, 565-572.

223. Nguyen N.T. (2003): Deriving consensus for conflict data in web-based systems. In: Proceedings of IEA-AIE 2003, UK 2003. Lecture Notes in Artificial Intelligence 2718, 254-263.

224. Sobecki J., Nguyen N.T. (2003): Consensus-based adaptive interface construction for multiplatform web applications. In: Proceedings of IDEAL'2003, Hong Kong 2003. Lecture Notes in Computer Science 2690, 465-472.

225. Danilowicz C., Nguyen H.C., Nguyen N.T. (2003): Model of intelligent information retrieval systems using user profiles. In: Proceedings of BIS’2003. Colorado USA, pp. 30-36.

226. Kukla E., Nguyen N.T., Sobecki J., Danilowicz C., Lenar M. (2003): A model conception for learner profile construction and determination of optimal scenario in intelligent learning systems. In Proceedings of KES’2003. Oxford UK. Lecture Notes in Artificial Intelligence 2774, 1216-1222.

227. Katarzyniak R., Nguyen N.T. (2002): Solving conflicts of agent knowledge states in multiagent systems. In: Proceedings of RSFDGrC 2002, Lecture Notes in Computer Science 2540, 231-239.

228. Król D., Nguyen N.T., Danilowicz C. (2002): Migration of multi-class objects in information systems. In: Advances in Soft Computing, Proceedings of 11th International Conference on Intelligent Information Systems IIS'2002. Physica Heidenberg New York, 403-412.

229. Katarzyniak R., Nguyen N.T. (2002): Modification of weights of conflict profile’s elements and dependencies of attributes in consensus model. In: Proceedings of SOFSEM 2002, Lecture Notes in Artificial Intelligence 2475, 131-138.

230. Nguyen N.T. (2001): Using Consensus for Solving Conflict Situations in Fault-Tolerant Distributed Systems. In: Proceedings of First IEEE/ACM Symposium on Cluster Computing and the Grid 2001, Australia, IEEE Computer Press, 379-385.

231. Nguyen N.T. (2001): Representation Choice Methods as the Tool for Solving Uncertainty in Distributed Temporal Database Systems with Indeterminate Valid Time. In: Proceedings of IEA-AIE 2001, Lecture Notes in Artificial Intelligence 2070, 445-454.

232. Danilowicz C., Nguyen N.T. (2001): Criteria and functions for expert information representation choice. In: K³opotek et al. (eds), Advances in Soft Computing, Proceedings of 10th International Conference on Intelligent Information Systems'2001, Physica 2001, 225-234.

233. Nguyen N.T., Sobecki J. (2001): Designing Intelligent User Interfaces Using Consensus-Based Methods for User Profile Determination. In: J. Zendulka (ed.), Proceedings of Int. Conference on Information System Modelling, Ostrava Czechy, Acta MOSIS, 2001, 139-146.

234. Sobecki J., Nguyen N.T. (2001): Consensus based adaptive user interfaces for universal access systems. In: Proceedings of First International Conference on Universal Access Human Computer Interaction, Orlando USA, Vol. 3, 2001, s. 112-116.

235. Nguyen N.T. (2001): Reconciling of disagreeing data in Web-based distributed systems using consensus methods. In: Proceedings of IAT 2001, Lecture Notes in Artificial Intelligence 2198, 601-606.

236. Danilowicz C., Nguyen N.T. (2000): Consensus-based methods for restoring consistency of replicated data. In: K³opotek et al. (eds), Advances in Soft Computing, Proceedings of 9th International Conference on Intelligent Information Systems'2000, Physica, 325-336.

237. Katarzyniak R., Nguyen N.T.(2000), Using consensus methods to determining encapsulated profiles of the world states distributed in multiagent systems. In: Proceedings of 14th International Conference on System Science, Coventry, UK, 300-304.

238. Sobecki J., Nguyen N.T. (2000), Towards Distributed Learning of Logic – Design Perspective. In: Proceedings of Second Congress on Engineering Education, J. Pudlowski.(ed.), Clayton; Melbourne: UNESCO International Centre for Engineering Education, Faculty of Engineering, Monash University, Wismar, Germany 2000, 162-164.

239. Nguyen N.T. (2000): Using consensus methods for solving conflicts of data in distributed systems. In: Proceedings of SOFSEM 2000, Lecture Notes in Computer Science 1963, 411-419.

240. Nguyen N.T. (2000): Using consensus methods for determining the representation of expert information in distributed systems. In: Proceedings of AIMSA 2000, Lecture Notes in Artificial Intelligence 1904, 11-20.