Download Computer and Information Sciences - ISCIS 2004: 19th by Erol Gelenbe (auth.), Cevdet Aykanat, Tuǧrul Dayar, İbrahim PDF

By Erol Gelenbe (auth.), Cevdet Aykanat, Tuǧrul Dayar, İbrahim Körpeoğlu (eds.)

The sequence of ISCIS (International Symposium on laptop and data Sciences) symposia were held every year when you consider that 1986, usually in Turkey and sometimes out of the country. it's the major desktop technology and engineering assembly equipped by way of Turkish teachers and was once based via Erol Gelenbe. every year ISCIS draws a signi?cant variety of overseas members from world wide. The nineteenth ISCIS was once prepared by means of Bilkent collage, division of computing device Engineering, and was once held in Kemer-Antalya, Turkey in the course of 27–29 October 2004. For ISCIS 2004, a complete of 335 papers went throughout the assessment approach and quite a few fine quality papers competed for attractiveness. This quantity of the Springer Lecture Notes in desktop technology (LNCS) sequence includes a hundred of these papers that commonly fall into the subsequent components of curiosity: arti?cial int- ligence and computer studying, special effects and consumer interfaces, laptop networksand safety, machine imaginative and prescient and picture processing,databasesystems, modeling and function overview, traditional languageprocessing, parallel and disbursed computing, real-time keep an eye on functions, software program engineering and programming structures, and conception of computing.

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Extra resources for Computer and Information Sciences - ISCIS 2004: 19th International Symposium, Kemer-Antalya, Turkey, October 27-29, 2004. Proceedings

Example text

With results of each run are given in the charts below: Fig. 2. Effect of training text size on Birand’s articles As seen from Figure 2, increasing the training size gradually improves the compression performance of Birand’s articles, as expected. 25% for Birand’s case. This represents a considerable performance improvement. We also plotted the compression performance variation with changing training text size for Altan’s articles. This plot is shown in Figure 3. According to Figure 3, bpc rates for Altan’s articles improves with increasing training text size as was the case with Birand’s articles.

In one case only (the last row of Table 7), a nonmost recent text yields slightly better compression. 2. Considering the whole recency experiments, the most recent training text compresses consistently better, but only with a small margin. The recency effect is not only a matter of same topics being discussed in the articles, which are close in time, but also the variation in the author’s writing style. For the former factor, since the articles under consideration are the texts from daily newspapers, it is quite expected that they are highly effected by the current politic, economic and social climate.

In our implementation, we choose symbols to be characters. This makes the PPM model independent of the source language. 2 Corpus As for the corpus, we compiled daily articles of four journalists (namely Mehmet Ali Birand, Cetin Altan, Emin Colasan and Melih Asik) on Turkish newspapers (Hurriyet, Milliyet and Sabah) via Internet. For each author, we created six files: One file consisting of the author’s articles before 2000, and five more belonging to years between 2000 and 2004, inclusively. For 2004, we only have the authors’ articles written during the first four months of the year.

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