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Conference proceedings 1981ment modern microchemistry plays an important role in science and technology. It had been the intention of the Scientific th Executive Committee to demonstrate this at the 8 International Micro­ chemical Symposium with the goal to encourage interdisciplinary communication and stimulate discussion.

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Web Information Personalization: Challenges and Approaches alleviate this problem, personalization becomes a popular remedy to customize the Web environment towards a user’s preference. To date, . and . are the most successful examples of Web personalization. By focusing on these two types of systems, this paper reviews the challenges and the corresponding