Leveraging Social Media in disaster situations / Hamada Mohamed Abdelsamee Zahera ; 1. Reviewer: Prof. Dr. Axel-Cyrille Ngonga Ngomo, 2. Reviewer: Prof. Dr. Michael Cochez. Paderborn, 2023
Inhalt
- Titlepage
- Abstract
- Acknowledgement
- Contents
- 1 Introduction
- 1.1 Social Media during Disasters
- 1.2 Mining and Processing Social Media Data
- 1.3 Motivation
- 1.4 Research Questions and Contributions
- 1.5 Thesis Outline
- 1.6 Own publications
- 1.7 Source Code
- 2 Background
- 2.1 Concepts and Terminology
- 2.2 Collecting and Processing Social Media Data
- 2.3 Representation Learning Approaches
- 2.4 Deep Learning Models for Natural Language Processing
- 2.4.1 Convolutional Neural Network
- 2.4.2 Recurrent Neural Network
- 2.4.3 Long-Short Term Memory
- 2.4.4 Graph Attention Network
- 2.5 Knowledge Graphs
- 2.6 Performance Evaluation
- 2.6.1 Accuracy, Precision, Recall, F1
- 2.6.2 Alert Accumulative Worth
- 2.6.3 Keyphrase Extraction Evaluation
- 2.7 Datasets
- 2.8 Applications
- 2.9 Summary
- 3 State-of-the-Art
- 3.1 Early Event Detection
- 3.2 Filtering Informative Tweets
- 3.3 Summarizing Disaster-related Tweets
- 3.4 Summary
- 4 Joint Learning from Environmental Data and Social Media
- 4.1 Overview
- 4.2 Data Analysis and Preliminaries
- 4.3 Our Approach
- 4.3.1 Problem Formulation
- 4.3.2 Semantic-enriched Word Embeddings
- 4.3.3 Model I: Feature Extractor
- 4.3.4 Model II: Typhoon Classifier
- 4.4 Experiments
- 4.5 Summary and Conclusion
- 5 Classifying Social Media into Multiple Information Types
- 6 Identifying Actionable Information From Social Media
- 6.1 Overview
- 6.2 Our Approach
- 6.3 Experiments
- 6.3.1 Datasets
- 6.3.2 Baselines
- 6.3.3 Implementation and Preprocessing
- 6.3.4 Evaluation Metrics
- 6.3.5 Evaluating Actionable Information
- 6.3.6 Results and Discussion
- 6.3.7 Ablation Study
- 6.4 Summary and Conclusion
- 7 Keyphrases Extraction from Disaster-related Tweets
- 7.1 Overview
- 7.2 Our Approach
- 7.2.1 Problem Formulation
- 7.2.2 Present Keyphrase Extraction
- 7.2.3 Absent Keyphrase Generation
- 7.2.4 Keyphrases Semantic Matching
- 7.3 Experiments
- 7.3.1 Experimental Setup
- 7.3.2 Present Keyphrase Evaluation
- 7.3.3 Absent Keyphrase Evaluation
- 7.3.4 Ablation Study
- 7.3.5 Use Case: Keyphrase Extraction from Crisis Tweets
- 7.4 Summary and Conclusion
- 8 Conclusion
- Bibliography