Pushpak Bhattacharyya

Aditya Joshi

Mark J. Carman

This book describes the authors’ investigations of computational sarcasm based on the notion of incongruity. In addition, it provides a holistic view of past work in computational sarcasm and the challenges and opportunities that lie ahead. Sarcastic text is a peculiar form of sentiment expression and computational sarcasm refers to computational techniques that process sarcastic text. To first understand the phenomenon of sarcasm, three studies are conducted: (a) how is sarcasm annotation impacted when done by non-native annotators? (b) How is sarcasm annotation impacted when the task is to distinguish between sarcasm and irony? And (c) can targets of sarcasm be identified by humans and computers. Following these studies, the book proposes approaches for two research problems: sarcasm detection and sarcasm generation. To detect sarcasm, incongruity is captured in two ways: ‘intra-textual incongruity’ where the authors look at incongruity within the text to be classified (i.e., target text) and ‘context incongruity’ where the authors incorporate information outside the target text. These approaches use machine-learning techniques such as classifiers, topic models, sequence labelling, and word embeddings. These approaches operate at multiple levels: (a) sentiment incongruity (based on sentiment mixtures), (b) semantic incongruity (based on word embedding distance), (c) language model incongruity (based on unexpected language model), (d) author’s historical context (based on past text by the author), and (e) conversational context (based on cues from the conversation). In the second part of the book, the authors present the first known technique for sarcasm generation, which uses a template-based approach to generate a sarcastic response to user input. This book will prove to be a valuable resource for researchers working on sentiment analysis, especially as applied to automation in social media.

Investigations in Computational Sarcasm

Achyuta Ayan Misra

Soumyajit Mukherjee

Narayan Bose

Mohit Kumar

Tuhin Biswas

Rajkumar Ghosh

Dripta Dutta

Swagato Dasgupta

Manoj A. Limaye

This book presents more than 600 eye-catching structural geological photographs and explanatory descriptions, from different Indian terrains. This book will enable easy identification of deformation features, one of the most important tasks in structural geology at the meso- and micro-scales. The book focuses on ductile and brittle shear sense indicators. This book suits for the undergraduate and graduate geoscience students. The book will be of considerable interest to tectonicians and structural geologists, given the enormous international importance of Indian terrains for exploration and other purposes.

Structural Geological Atlas

Aditya Joshi

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