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"Salah satu metode otomatis untuk analisis data tekstual adalah deteksi topik. Eigenspace-based Fuzzy C-Means EFCM adalah metode berbasis soft clustering untuk pendeteksian topik. Pertama, EFCM menggunakan dekomposisi nilai tunggal terpotong untuk mengubah data tekstual dimensi tinggi menjadi data berdimensi rendah. Selanjutnya, proses pengelompokan dilakukan dalam ruang dimensi yang lebih kecil. Namun, proses transformasi itu dapat menghilangkan beberapa fitur penting dari data tekstual. Karena itu, akurasi dapat berkurang. Dalam penelitian ini digunakan kernel trick untuk mengatasi kelemahan tersebut sehingga proses clustering dapat dilakukan dalam ruang dimensi yang lebih tinggi. Simulasi menunjukkan bahwa pendekatan ini memberikan akurasi yang lebih baik dalam menemukan topik daripada EFCM untuk masalah mendeteksi topik di Twitter.

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One of automated methods for textual data analysis is topic detection. Eigenspace based fuzzy c means EFCM is a soft clustering based method for topic detection. Firstly, EFCM use truncated singular value decomposition to transform high dimensional textual data to low dimensional data. Next, the clustering process is conducted in the smaller dimensional space. However, that transformation process may eliminate some important features from the textual data. Therefore, the accuracy may be reduced.

In this study used kernel trick to overcome that weakness so that the clustering process is performed in a higher dimensional space. Simulations show that this approach gives better accuracies in term of topic recall than EFCM for the problem of sensing trending topic in Twitter."

"This book introduces an array of fundamental mathematical structures. It also explores the delicate balance of intuition and rigor—and the flexible thinking—required to prove a nontrivial result. In short, this book seeks to enhance the mathematical maturity of the reader. The new material in this second edition includes a section on graph theory, several new sections on number theory (including primitive roots, with an application to card-shuffling), and a brief introduction to the complex numbers (including a section on the arithmetic of the Gaussian integers). "

"This easy-to-follow textbook introduces the mathematical language, knowledge and problem-solving skills that undergraduates need to study computing. The language is in part qualitative, with concepts such as set, relation, function and recursion/induction, but it is also partly quantitative, with principles of counting and finite probability. Entwined with both are the fundamental notions of logic and their use for representation and proof. Features : teaches finite math as a language for thinking, as much as knowledge and skills to be acquired, uses an intuitive approach with a focus on examples for all general concepts, brings out the interplay between the qualitative and the quantitative in all areas covered, particularly in the treatment of recursion and induction, balances carefully the abstract and concrete, principles and proofs, specific facts and general perspectives, includes highlight boxes that raise common queries and clear confusions, and provides numerous exercises, with selected solutions."

"This book constitutes the refereed proceedings of the 6th International Workshop on Reachability Problems, RP 2012, held in Bordeaux, France, in September, 2012. The 8 revised full papers presented together with 4 invited talks were carefully reviewed and selected from 15 submissions. The papers present current research and original contributions related to reachability problems in different computational models and systems such as algebraic structures, computational models, hybrid systems, logic and verification. Reachability is a fundamental problem that appears in several different contexts: finite and infinite-state concurrent systems, computational models like cellular automata and Petri nets, decision procedures for classical, modal and temporal logic, program analysis, discrete and continuous systems, time critical systems, and open systems modeled as games."