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1 DEIM Forum 2016 C , 1 Greek Prime Minister Calls for Referendum on Bailout Terms 1 Friday, June 26, 2015 In an unexpected move, Prime Minister Alexis Tsipras went on national television early Saturday to call for a referendum on July 5, so that Greek citizens can decide whether to accept or reject the terms of a bailout deal proposed by the country s creditors.... 1: 1 greek-debt-talks-enter-final-stages.html

2 greek financial crisis 1 HITS Rennison [10] [9] Cui [3] Shahaf [11] Allan [1] Smith [12] Milne [8] Wikipedia Yang [15] Cybulska [4] [14] [13] Jatowt [6] Brin [2] Web Web Kleinberg [7] Web Hub Authority HITS Deng [5] HITS

3 Russia stages military exercises as Ukrainian forces advance 2 Wednesday, August 6, 2014 On Monday, as Ukrainian forces continue to advance into rebel held territory, Russia announced it is to hold military exercises near its border with Ukraine.... Russia held military exercises in the area in March; last w eek NATO General Philip Breedlove said Russia still has 12,000 troops adjacent to Ukraine, although Russia has cl aimed its forces have withdrawn from the area.... Meanwhile, fighting continued in Eastern Ukraine as gove rnment forces advance on the cities of Donetsk and Luha nsk, the principal cities left in rebel hands On Monday... 3 Russia held... Meanwhile, fighting... 2: 3: 3. 3 Russia stages military exercises as Ukrainian forces advance

4 bag-of-words Bag-of-words TF-IDF 4. 2 Smith [12] Smith [14] bag-of-words (SVM) 4. 4 HITS HITS Generalized co-hits Deng [5] generalized co-hits Generalized co-hits Kleinberg [7] HITS HITS Web authority hub authority hub Web authority hub hub authority HITS Web p hub hub(p) authority auth(p) Web P L : P P (p, q) L p q auth(p) = hub(q) s.t. Pp h = {q (q, p) L} P q P h p hub(p) = auth(q) s.t. Pp a = {q (p, q) L} P q P a p

5 HITS Web authority hub Generalized co-hits HITS G = (U V, E) U V U V = E : U V u U s(u) v V s(v) s(u) = v V u s(v) s.t. V u = {v (u, v) E} V s(v) = u U v s(u) s.t. U v = {u (u, v) E} U hub authority Generalized co-hits HITS HITS authority hub HITS (i) (ii) (iii) (iv) : 1 (i) (i) (ii) (ii) (iii) (iii) (iv) (iv) 1 A E L m L b e E s(e) a A s(a) s(e) = s(a) s.t. A b e = {a (a, e) L b } A a A b e s(a) = s(e) s.t. Ea m = {e (a, e) L m } E e E m a : 2 A E L L m L b e E s m (e) s b (e) a A s(a) s m (e) = s(a) s.t. A m e = {a (a, e) L m } A a A m e s b (e) = s(a) s.t. A b e = {a (a, e) L b } A a A b e s(a) = s m (e) + s b (e) s.t. E a = {e (a, e) L} E e E a

6 5. 1: Python The New York Times Annotated Corpus (NYT Corpus) 2 NYT Corpus ,855, NYT Corpus taxonomicclassifiers typesofmaterial Smith Python PE- TRARCH 6 PETRARCH 30 taxonomicclassifiers Top/News taxonomicclassifiers Top/Opinion typesofmaterial [14] SVM Python scikitlearn Elasticsearch 4 Elasticsearch More Like This Query 5 More Like This Query Elasticsearch More Like This Query TF-IDF [14] Python NumPy query-dsl-mlt-query.html 8

7 2: method article group all short long baseline (date) baseline (similarity) asymmetric@50, multiplexing@50 50 asymmetric@10, multiplexing@10 10 baseline (date), baseline (similarity) 50 ndcg@ Web ndcg@ asymmetric@10 multiplexing@10 asymmetric@50 multiplexing@50 A Solidarity-Warsaw Meeting Is Said to Be Close at Hand Friday, December 16, 1988 Lech Walesa said today that Solidarity and the Communist Government were close to opening formal talks on Poland s future. The round table is very close at hand, the Solidarity leader told a news conference here. He was referring to a Government invitation in September for the banned union to join negotiations on economic and political changes proposed by the Communist Party. Mr. Walesa said the Government was moving closer to accepting Solidarity s main condition for attending the talks - publication of an official declaration of intent to consider legalizing the union. # asymmetric@50 baseline (similarity) 1 Poland s Bishops Name 5 Ship Workers Strike, Defying Walesa Mediators in Labor Conflict 2 At Solidarity, A Quiet Walesa Sees a Legalized Stand On Changes Union 3 Poland Announces December Closing of Lenin Ship- Strike Alert Walesa Threatens to Call a yard 4: 2 short 100 long 100 baseline(similarity) short long short short Walesa 2

8 6. (A) 15H01718 ( ) Adam Jatowt [1] J. Allan, R. Papka, and V. Lavrenko. On-line new event detection and tracking. In Proceedings of the 21st annual international ACM SIGIR conference on Research and development in information retrieval, pp ACM, [2] S. Brin and L. Page. The anatomy of a large-scale hypertextual web search engine. Computer networks and ISDN systems, 30(1): , [3] W. Cui, H. Qu, H. Zhou, W. Zhang, and S. Skiena. Watch the story unfold with textwheel: Visualization of large-scale news streams. ACM Transactions on Intelligent Systems and Technology (TIST), 3(2):20, [4] A. Cybulska and P. Vossen. Event models for historical perspectives: Determining relations between high and low level events in text, based on the classification of time, location and participants. In LREC 10, pp , [5] H. Deng, M. R. Lyu, and I. King. A generalized co-hits algorithm and its application to bipartite graphs. In Proceedings of the 15th ACM SIGKDD international conference on Knowledge discovery and data mining, pp ACM, [6] A. Jatowt, C.-M. Au Yeung, and K. Tanaka. Estimating document focus time. In Proceedings of the 22nd ACM international conference on Conference on information & knowledge management, pp ACM, [7] J. M. Kleinberg. Authoritative sources in a hyperlinked environment. Journal of the ACM (JACM), 46(5): , [8] D. Milne and I. H. Witten. An open-source toolkit for mining wikipedia. Artificial Intelligence, 194: , [9] A. Nadamoto and K. Tanaka. Time-based contextualizednews browser (t-cnb). In Proceedings of the 13th international World Wide Web conference on Alternate track papers & posters, pp ACM, [10] E. Rennison. Galaxy of news: An approach to visualizing and understanding expansive news landscapes. In Proceedings of the 7th annual ACM symposium on User interface software and technology, pp ACM, [11] D. Shahaf and C. Guestrin. Connecting the dots between news articles. In Proceedings of the 16th ACM SIGKDD international conference on Knowledge discovery and data mining, pp ACM, [12] D. A. Smith. Detecting and browsing events in unstructured text. In Proceedings of the 25th annual international ACM SIGIR conference on Research and development in information retrieval, pp ACM, [13] S. Tanaka, A. Jatowt, and K. Tanaka. Analysis of mentions to historical events using news archives (in japanese). In Proceedings of the 6th Forum on Data Engineering and Information Management, pp. B4 2, [14] S. Tanaka, A. Jatowt, and K. Tanaka. Extraction and analysis of background events for improving comprehensibility of news articles (in japanese). In Proceedings of the 7th Forum on Data Engineering and Information Management, pp. F2 6, [15] Y. Yang, T. Pierce, and J. Carbonell. A study of retrospective and on-line event detection. In Proceedings of the 21st annual international ACM SIGIR conference on Research and development in information retrieval, pp ACM, 1998.