Abstract

Micro-blogging sites such as Facebook, Twitter, Google+ present a nice opportunity for targeting advertisements that are contextually related to the microblog content. By virtue of the sparse and noisy text makes identifying the microblogs suitable for advertising a very hard problem. In this work, we approach the problem of identifying the microblogs that could be targeted for advertisements as a twostep classification approach. In the first pass, microblogs suitable for advertising are identified. Next, in the second pass, we build a model to find the sentiment of the advertisable microblog. The systems use features derived from the Partof-speech tags, the tweet content and uses external resources such as query logs and n-gram dictionaries from previously labeled data. This work aims at providing a thorough insight into the problem and analyzing various features to assess which features contribute the most towards identifying the tweets that can be targeted for advertisements.

Abstract

Twitter is a micro blogging website, where users can post messages in very short text called Tweets. Tweets contain user opinion and sentiment towards an object or person. This sentiment information is very useful in various aspects for business and governments. In this paper, we present a method which performs the task of tweet sentiment identification using a corpus of pre-annotated tweets. We present a sentiment scoring function which uses prior information to classify (binary classification) and weight various sentiment bearing words/phrases in tweets. Using this scoring function we achieve classification accuracy of 87% on Stanford Dataset and 88% on Mejaj dataset. Using supervised machine learning approach, we achieve classification accuracy of 88% on Stanford dataset.

Abstract

Recognition of Named Entities (NEs) is a difficult process in Indian languages like Hindi, Telugu, etc., where sufficient gazetteers and annotated corpora are not available compared to English language. This paper details a novel clustering and co-occurrence based approach to map English NEs with their equivalent representations from different languages recognized in a language-independent way. We have substituted the required language specific resources by the richly structured multilingual content of Wikipedia. The approach includes clustering of highly similar Wikipedia articles. Then the NEs in an English article are mapped with other language terms in interlinked articles based on co-occurrence frequencies. The cluster information and the term co-occurrences are considered in extracting the NEs from non-English languages. Hence, the English Wikipedia is used to bootstrap the NEs for other languages. Through this approach, we have availed the structured, semi-structured and multilingual content of the Wikipedia to a massive extent. Experimental results suggest that the proposed approach yields promising results in rates of precision and recall.

Abstract

We wish to address the challenging task of opinion mining about organizations, people and places from different languages. It is known that resources and tools for mining opinions are scarce. In our study, we leverage comparable news articles collection to retrieve opinions about people (opinion targets) in resource scarce language like Hindi. Opinions expressed about opinion targets (Named Entities)given by adjectives and verbs known as opinion words are extracted from English collection of comparable corpora to get transliterated and translated to resource scare languages. Transformed opinion words are then used to create subjective language model (SLM) and structured opinion queries (OQs) using inference network (IN) for retrieval to confirm the opinion about opinion targets in documents. Experiments have shown that OQs and SLM with IN framework are effective for opinion mining tasks in minimal resource languages when compared to other retrieval approaches.

Abstract

This paper details the approach to identify Named Entities (NEs) from a large non-English corpus and associate them with appropriate tags, requiring minimal human intervention and no linguistic expertise. The main objective in this paper is to focus on Indian languages like Telugu, Hindi, Tamil, Marathi, etc., which are considered to be resourcepoor languages when compared to English. The inherent structure of Wikipedia was exploited in developing an efficient co-occurrence frequency based NE identification algorithm for Indian Languages. We describe the methods by which English Wikipedia data can be used to bootstrap the identification of NEs in other languages. On a dataset of 2,622 Marathi Wikipedia articles, with around 10,000 NEs manually tagged, an F-Measure of 81.25% was achieved by our system without availing language expertise. Similarly, an F-measure of 80.42% was achieved on around 12,000 NEs tagged within 2,935 Hindi Wikipedia articles.

Abstract

The energy consumption in data center is a key component in sustainable growth of paradigms like cloud computing. As servers are becoming more and more energy efficient, the concerns around network power consumption are increasing. We propose an approach to dynamically decide the number of network devices required to support the current load. In this paper, we evaluate our approach and report findings in terms of energy saving and performance of the network.

Abstract

We present, discuss and evaluate a hybrid approach of live migrating a virtual machine across hosts in a Gigabit LAN. Our hybrid approach takes the best of both the traditional methods of live migration - pre and post-copy. In pre-copy, the cpu state and memory is transferred before spawning the VM on destination host whereas the latter is exactly opposite and spawns the VM on destination right after transferring processor state. In our approach, in addition to processor state, we bundle a lot of useful state information. This includes devices and frequently accessed pages of the VM, aka the working set. This drastically reduces the number of page faults over network while we actively transfer memory. Additionally, on every page fault over the network we transfer a set of pages in its locality in addition to the page itself. We propose a prototype design on KVM/Qemu and present a comparative analysis of pre-copy, post-copy and our hybrid approach.

Abstract

Human moods continuously change over time. Tracking moods can provide important information about psychological and health behavior of an individual. Also, history of mood information can be used to predict the future moods of individuals. In this paper, we try to predict the mood transition of a Twitter user by regression analysis on the tweets posted over twitter time line. Initially, user tweets are automatically labeled with mood labels from time 0 to t-1. It is then used to predict user mood transition information at time t. Experiments show that SVM regression attained less root-mean-square error compared to other regression approaches for mood transition prediction.

Abstract

Identifying and extracting subjective information from News, Blogs and other user generated content has lot of applications. Most of the earlier work concentrated on English data. But, recently subjectivity related research at sentence-level in other languages has increased. In this paper, we achieve sentence-level subjectivity classification using language independent feature weighing and selection methods which are consistent across languages. Experiments performed on 5 different languages including English and South Asian language Hindi show that Entropy based category coverage difference criterion (ECCD) feature selection method with language independent feature weighing methods outperforms other approaches for subjective classification.

Abstract

This paper details the approach to identify Named Entities (NEs) from a large non-English corpus and associate them with appropriate tags, requiring minimal human intervention and no linguistic expertise. The main objective in this paper is to focus on Indian languages like Telugu, Hindi, Tamil, Marathi, etc., which are considered to be resource-poor languages when compared to English. The inherent structure of Wikipedia was exploited in developing an efficient co-occurrence frequency based NE identification algorithm for Indian Languages. We describe the methods by which English Wikipedia data can be used to bootstrap the identification of NEs in other languages which generates a list of NE's. Later, the paper focuses on utilizing this NE list to improve multilingual Entity Filling which showed promising results. On a dataset of 2,622 Marathi Wikipedia articles, with around 10,000 NEs manually tagged, an F-Measure of 81.25% was achieved by our system without availing language expertise. Similarly, an F-measure of 80.42% was achieved on around 12,000 NEs tagged within 2,935 Hindi Wikipedia articles.