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The first objective towards the effective use of microblogging services such as Twitter for situational awareness during the emerging disasters is discovery of the disaster-related postings. Given the wide range of possible disasters, using…

Computation and Language · Computer Science 2016-10-13 Shanshan Zhang , Slobodan Vucetic

We study how to detect clusters in a graph defined by a stream of edges, without storing the entire graph. We extend the approach to dynamic graphs defined by the most recent edges of the stream and to several streams. The {\em content…

Logic in Computer Science · Computer Science 2018-12-27 Michel de Rougemont , Guillaume Vimont

Many real networks that are inferred or collected from data are incomplete due to missing edges. Missing edges can be inherent to the dataset (Facebook friend links will never be complete) or the result of sampling (one may only have access…

Social and Information Networks · Computer Science 2016-09-28 Matthew Burgess , Eytan Adar , Michael Cafarella

We address here two major challenges presented by dynamic data mining: 1) the stability challenge: we have implemented a rigorous incremental density-based clustering algorithm, independent from any initial conditions and ordering of the…

Artificial Intelligence · Computer Science 2008-11-04 Alain Lelu , Martine Cadot , Pascal Cuxac

We present a novel approach incorporating transformer-based language models into infectious disease modelling. Text-derived features are quantified by tracking high-density clusters of sentence-level representations of Reddit posts within…

Computation and Language · Computer Science 2022-05-25 Felix Drinkall , Stefan Zohren , Janet B. Pierrehumbert

Sentence embedding models aim to provide general purpose embeddings for sentences. Most of the models studied in this paper claim to perform well on STS tasks - but they do not report on their suitability for clustering. This paper looks at…

Computation and Language · Computer Science 2021-04-19 Kees Varekamp

As global digitization continues to grow, technology becomes more affordable and easier to use, and social media platforms thrive, becoming the new means of spreading information and news. Communities are built around sharing and discussing…

Artificial Intelligence · Computer Science 2023-01-31 Alexandru Petrescu , Ciprian-Octavian Truică , Elena-Simona Apostol , Adrian Paschke

Many of the kinds of language model used in speech understanding suffer from imperfect modeling of intra-sentential contextual influences. I argue that this problem can be addressed by clustering the sentences in a training corpus…

cmp-lg · Computer Science 2008-02-03 David Carter

Cultural and social dynamics are important concepts that must be understood in order to grasp what a community cares about. To that end, an excellent source of information on what occurs in a community is the news, especially in recent…

Social and Information Networks · Computer Science 2020-10-23 Vladimir Vargas-Calderón , Nicolás Parra-A. , Jorge E. Camargo , Herbert Vinck-Posada

Gang affiliates have joined the masses who use social media to share thoughts and actions publicly. Interestingly, they use this public medium to express recent illegal actions, to intimidate others, and to share outrageous images and…

Social and Information Networks · Computer Science 2016-10-28 Sanjaya Wijeratne , Lakshika Balasuriya , Derek Doran , Amit Sheth

We develop an algorithm to detect community structure in complex networks. The algorithm is based on spectral methods and takes into account weights and links orientations. Since the method detects efficiently clustered nodes in large…

Disordered Systems and Neural Networks · Physics 2009-11-10 Andrea Capocci , Vito D. P. Servedio , Guido Caldarelli , Francesca Colaiori

The time at which a message is communicated is a vital piece of metadata in many real-world natural language processing tasks such as Topic Detection and Tracking (TDT). TDT systems aim to cluster a corpus of news articles by event, and in…

Computation and Language · Computer Science 2024-03-27 Hang Jiang , Doug Beeferman , Weiquan Mao , Deb Roy

The amount of text that is generated every day is increasing dramatically. This tremendous volume of mostly unstructured text cannot be simply processed and perceived by computers. Therefore, efficient and effective techniques and…

Computation and Language · Computer Science 2017-07-31 Mehdi Allahyari , Seyedamin Pouriyeh , Mehdi Assefi , Saied Safaei , Elizabeth D. Trippe , Juan B. Gutierrez , Krys Kochut

Most existing scene text detectors focus on detecting characters or words that only capture partial text messages due to missing contextual information. For a better understanding of text in scenes, it is more desired to detect contextual…

Computer Vision and Pattern Recognition · Computer Science 2022-07-27 Chuhui Xue , Jiaxing Huang , Shijian Lu , Changhu Wang , Song Bai

Classification of crisis events, such as natural disasters, terrorist attacks and pandemics, is a crucial task to create early signals and inform relevant parties for spontaneous actions to reduce overall damage. Despite crisis such as…

Computation and Language · Computer Science 2020-05-19 Junhua Liu , Trisha Singhal , Lucienne T. M. Blessing , Kristin L. Wood , Kwan Hui Lim

Topic detection is a challenging task, especially without knowing the exact number of topics. In this paper, we present a novel approach based on neural network to detect topics in the micro-blogging dataset. We use an unsupervised neural…

Information Retrieval · Computer Science 2020-06-18 Cong Wan , Shan Jiang , Cuirong Wang , Cong Wang , Changming Xu , Xianxia Chen , Ying Yuan

Monitoring network traffic data to detect any hidden patterns of anomalies is a challenging and time-consuming task that requires high computing resources. To this end, an appropriate summarization technique is of great importance, where it…

Machine Learning · Computer Science 2021-12-21 Samira Ghodratnama , Mehrdad Zakershahrak , Fariborz Sobhanmanesh

Online information has increased tremendously in today's age of Internet. As a result, the need has arose to extract relevant content from the plethora of available information. Researchers are widely using automatic text summarization…

Social and Information Networks · Computer Science 2021-06-02 Mohd Khizir Siddiqui , Amreen Ahmad , Om Pal , Tanvir Ahmad

Event datasets in the financial domain are often constructed based on actual application scenarios, and their event types are weakly reusable due to scenario constraints; at the same time, the massive and diverse new financial big data…

Machine Learning · Computer Science 2023-02-17 Dianyue Gu , Zixu Li , Zhenhai Guan , Rui Zhang , Lan Huang

Social media has played a huge part on how people get informed and communicate with one another. It has helped people express their needs due to distress especially during disasters. Because posts made through it are publicly accessible by…

Computation and Language · Computer Science 2021-08-22 Ocean M. Barba , Franz Arvin T. Calbay , Angelica Jane S. Francisco , Angel Luis D. Santos , Charmaine S. Ponay