pwc-archive/papers-with-abstracts huggingface dataset:
Bengali Fake Reviews: A Benchmark Dataset and Detection System
Authors: G. M. Shahariar, Md. Tanvir Rouf Shawon, Faisal Muhammad Shah, Mohammad Shafiul Alam, Md. Shahriar Mahbub
Date: 2023-08-03 00:00:00

The proliferation of fake reviews on various online platforms has created a major concern for both consumers and businesses. Such reviews can deceive customers and cause damage to the reputation of products or services, making it crucial to identify them. Although the detection of fake reviews has been extensively studied in English language, detecting fake reviews in non-English languages such as Bengali is still a relatively unexplored research area. This paper introduces the Bengali Fake Review Detection (BFRD) dataset, the first publicly available dataset for identifying fake reviews in Bengali. The dataset consists of 7710 non-fake and 1339 fake food-related reviews collected from social media posts. To convert non-Bengali words in a review, a unique pipeline has been proposed that translates English words to their corresponding Bengali meaning and also back transliterates Romanized Bengali to Bengali. We have conducted rigorous experimentation using multiple deep learning and pre-trained transformer language models to develop a reliable detection system. Finally, we propose a weighted ensemble model that combines four pre-trained transformers: BanglaBERT, BanglaBERT Base, BanglaBERT Large, and BanglaBERT Generator . According to the experiment results, the proposed ensemble model obtained a weighted F1-score of 0.9843 on 13390 reviews, including 1339 actual fake reviews and 5356 augmented fake reviews generated with the nlpaug library. The remaining 6695 reviews were randomly selected from the 7710 non-fake instances. The model achieved a 0.9558 weighted F1-score when the fake reviews were augmented using the bnaug library.
MultiEM: Efficient and Effective Unsupervised Multi-Table Entity Matching
Authors: Xiaocan Zeng, Pengfei Wang, YUREN MAO, Lu Chen, Xiaoze Liu, Yunjun Gao
Date: 2023-08-02 00:00:00
Tasks: Management

Entity Matching (EM), which aims to identify all entity pairs referring to the same real-world entity from relational tables, is one of the most important tasks in real-world data management systems. Due to the labeling process of EM being extremely labor-intensive, unsupervised EM is more applicable than supervised EM in practical scenarios. Traditional unsupervised EM assumes that all entities come from two tables; however, it is more common to match entities from multiple tables in practical applications, that is, multi-table entity matching (multi-table EM). Unfortunately, effective and efficient unsupervised multi-table EM remains under-explored. To fill this gap, this paper formally studies the problem of unsupervised multi-table entity matching and proposes an effective and efficient solution, termed as MultiEM. MultiEM is a parallelable pipeline of enhanced entity representation, table-wise hierarchical merging, and density-based pruning. Extensive experimental results on six real-world benchmark datasets demonstrate the superiority of MultiEM in terms of effectiveness and efficiency.
DCTM: Dilated Convolutional Transformer Model for Multimodal Engagement Estimation in Conversation
Authors: Vu Ngoc Tu, Van Thong Huynh, Hyung-Jeong Yang, M. Zaigham Zaheer, Shah Nawaz, Karthik Nandakumar, Soo-Hyung Kim
Date: 2023-07-31 00:00:00
Tasks: regression

Conversational engagement estimation is posed as a regression problem, entailing the identification of the favorable attention and involvement of the participants in the conversation. This task arises as a crucial pursuit to gain insights into human's interaction dynamics and behavior patterns within a conversation. In this research, we introduce a dilated convolutional Transformer for modeling and estimating human engagement in the MULTIMEDIATE 2023 competition. Our proposed system surpasses the baseline models, exhibiting a noteworthy $7$\% improvement on test set and $4$\% on validation set. Moreover, we employ different modality fusion mechanism and show that for this type of data, a simple concatenated method with self-attention fusion gains the best performance.
Proposing a conceptual framework: social media listening for public health behavior
Authors: Shu-Feng Tsao, Helen Chen, Samantha Meyer, Zahid A. Butt
Date: 2023-07-30 00:00:00
Tasks: Misinformation

Existing communications and behavioral theories have been adopted to address health misinformation. Although various theories and models have been used to investigate the COVID-19 pandemic, there is no framework specially designed for social listening or misinformation studies using social media data and natural language processing techniques. This study aimed to propose a novel yet theory-based conceptual framework for misinformation research. We collected theories and models used in COVID-19 related studies published in peer-reviewed journals. The theories and models ranged from health behaviors, communications, to misinformation. They are analyzed and critiqued for their components, followed by proposing a conceptual framework with a demonstration. We reviewed Health Belief Model, Theory of Planned Behavior/Reasoned Action, Communication for Behavioral Impact, Transtheoretical Model, Uses and Gratifications Theory, Social Judgment Theory, Risk Information Seeking and Processing Model, Behavioral and Social Drivers, and Hype Loop. Accordingly, we proposed the Social Media Listening for Public Health Behavior Conceptual Framework by not only integrating important attributes of existing theories, but also adding new attributes. The proposed conceptual framework was demonstrated in the Freedom Convoy social media listening. The proposed conceptual framework can be used to better understand public discourse on social media, and it can be integrated with other data analyses to gather a more comprehensive picture. The framework will continue to be revised and adopted as health misinformation evolves.
A State-Space Perspective on Modelling and Inference for Online Skill Rating
Authors: Samuel Duffield, Samuel Power, Lorenzo Rimella
Date: 2023-08-04 00:00:00
Tasks: Computational Efficiency, parameter estimation

We summarise popular methods used for skill rating in competitive sports, along with their inferential paradigms and introduce new approaches based on sequential Monte Carlo and discrete hidden Markov models. We advocate for a state-space model perspective, wherein players' skills are represented as time-varying, and match results serve as observed quantities. We explore the steps to construct the model and the three stages of inference: filtering, smoothing and parameter estimation. We examine the challenges of scaling up to numerous players and matches, highlighting the main approximations and reductions which facilitate statistical and computational efficiency. We additionally compare approaches in a realistic experimental pipeline that can be easily reproduced and extended with our open-source Python package, https://github.com/SamDuffield/abile.
Classifying Causal Structures: Ascertaining when Classical Correlations are Constrained by Inequalities
Authors: Shashaank Khanna, Marina Maciel Ansanelli, Matthew F. Pusey, Elie Wolfe
Date: 2023-08-04 00:00:00

The classical causal relations between a set of variables, some observed and some latent, can induce both equality constraints (typically conditional independences) as well as inequality constraints (Instrumental and Bell inequalities being prototypical examples) on their compatible distribution over the observed variables. Enumerating a causal structure's implied inequality constraints is generally far more difficult than enumerating its equalities. Furthermore, only inequality constraints ever admit violation by quantum correlations. For both those reasons, it is important to classify causal scenarios into those which impose inequality constraints versus those which do not. Here we develop methods for detecting such scenarios by appealing to d-separation, e-separation, and incompatible supports. Many (perhaps all?) scenarios with exclusively equality constraints can be detected via a condition articulated by Henson, Lal and Pusey (HLP). Considering all scenarios with up to 4 observed variables, which number in the thousands, we are able to resolve all but three causal scenarios, providing evidence that the HLP condition is, in fact, exhaustive.
Differentiable short-time Fourier transform with respect to the hop length
Authors: Maxime Leiber, Yosra Marnissi, Axel Barrau, Mohammed El Badaoui
Date: 2023-07-26 00:00:00
Tasks: Position

In this paper, we propose a differentiable version of the short-time Fourier transform (STFT) that allows for gradient-based optimization of the hop length or the frame temporal position by making these parameters continuous. Our approach provides improved control over the temporal positioning of frames, as the continuous nature of the hop length allows for a more finely-tuned optimization. Furthermore, our contribution enables the use of optimization methods such as gradient descent, which are more computationally efficient than conventional discrete optimization methods. Our differentiable STFT can also be easily integrated into existing algorithms and neural networks. We present a simulated illustration to demonstrate the efficacy of our approach and to garner interest from the research community.
Optimally Computing Compressed Indexing Arrays Based on the Compact Directed Acyclic Word Graph
Authors: Hiroki Arimura, Shunsuke Inenaga, Yasuaki Kobayashi, Yuto Nakashima, Mizuki Sue
Date: 2023-08-04 00:00:00

In this paper, we present the first study of the computational complexity of converting an automata-based text index structure, called the Compact Directed Acyclic Word Graph (CDAWG), of size $e$ for a text $T$ of length $n$ into other text indexing structures for the same text, suitable for highly repetitive texts: the run-length BWT of size $r$, the irreducible PLCP array of size $r$, and the quasi-irreducible LPF array of size $e$, as well as the lex-parse of size $O(r)$ and the LZ77-parse of size $z$, where $r, z \le e$. As main results, we showed that the above structures can be optimally computed from either the CDAWG for $T$ stored in read-only memory or its self-index version of size $e$ without a text in $O(e)$ worst-case time and words of working space. To obtain the above results, we devised techniques for enumerating a particular subset of suffixes in the lexicographic and text orders using the forward and backward search on the CDAWG by extending the results by Belazzougui et al. in 2015.
ECG classification using Deep CNN and Gramian Angular Field
Authors: Youssef Elmir, Yassine Himeur, Abbes Amira
Date: 2023-07-25 00:00:00
Tasks: Anomaly Detection, Classification, ECG Classification, Rhythm

This paper study provides a novel contribution to the field of signal processing and DL for ECG signal analysis by introducing a new feature representation method for ECG signals. The proposed method is based on transforming time frequency 1D vectors into 2D images using Gramian Angular Field transform. Moving on, the classification of the transformed ECG signals is performed using Convolutional Neural Networks (CNN). The obtained results show a classification accuracy of 97.47% and 98.65% for anomaly detection. Accordingly, in addition to improving the classification performance compared to the state-of-the-art, the feature representation helps identify and visualize temporal patterns in the ECG signal, such as changes in heart rate, rhythm, and morphology, which may not be apparent in the original signal. This has significant implications in the diagnosis and treatment of cardiovascular diseases and detection of anomalies.
Applications and Societal Implications of Artificial Intelligence in Manufacturing: A Systematic Review
Authors: John P. Nelson, Justin B. Biddle, Philip Shapira
Date: 2023-07-25 00:00:00

This paper undertakes a systematic review of relevant extant literature to consider the potential societal implications of the growth of AI in manufacturing. We analyze the extensive range of AI applications in this domain, such as interfirm logistics coordination, firm procurement management, predictive maintenance, and shop-floor monitoring and control of processes, machinery, and workers. Additionally, we explore the uncertain societal implications of industrial AI, including its impact on the workforce, job upskilling and deskilling, cybersecurity vulnerability, and environmental consequences. After building a typology of AI applications in manufacturing, we highlight the diverse possibilities for AI's implementation at different scales and application types. We discuss the importance of considering AI's implications both for individual firms and for society at large, encompassing economic prosperity, equity, environmental health, and community safety and security. The study finds that there is a predominantly optimistic outlook in prior literature regarding AI's impact on firms, but that there is substantial debate and contention about adverse effects and the nature of AI's societal implications. The paper draws analogies to historical cases and other examples to provide a contextual perspective on potential societal effects of industrial AI. Ultimately, beneficial integration of AI in manufacturing will depend on the choices and priorities of various stakeholders, including firms and their managers and owners, technology developers, civil society organizations, and governments. A broad and balanced awareness of opportunities and risks among stakeholders is vital not only for successful and safe technical implementation but also to construct a socially beneficial and sustainable future for manufacturing in the age of AI.
MetricGAN-OKD: Multi-Metric Optimization of MetricGAN via Online Knowledge Distillation for Speech Enhancement
Authors: WooSeok Shin, Byung Hoon Lee, Jin Sob Kim, Hyun Joon Park, Sung Won Han
Date: 2023-07-24 00:00:00
Proceeding: ICML 2023 7
Tasks: Knowledge Distillation, Speech Enhancement

In speech enhancement, MetricGAN-based approaches reduce the discrepancy between the $L_p$ loss and evaluation metrics by utilizing a non-differentiable evaluation metric as the objective function. However, optimizing multiple metrics simultaneously remains challenging owing to the problem of confusing gradient directions. In this paper, we propose an effective multi-metric optimization method in MetricGAN via online knowledge distillation---MetricGAN-OKD. MetricGAN-OKD, which consists of multiple generators and target metrics, related by a one-to-one correspondence, enables generators to learn with respect to a single metric reliably while improving performance with respect to other metrics by mimicking other generators. Experimental results on speech enhancement and listening enhancement tasks reveal that the proposed method significantly improves performance in terms of multiple metrics compared to existing multi-metric optimization methods. Further, the good performance of MetricGAN-OKD is explained in terms of network generalizability and correlation between metrics.
Emotion recognition based on multi-modal electrophysiology multi-head attention Contrastive Learning
Authors: Yunfei Guo, Tao Zhang, Wu Huang
Date: 2023-07-12 00:00:00
Tasks: Contrastive Learning, EEG, Emotion Recognition, Multimodal Emotion Recognition

Emotion recognition is an important research direction in artificial intelligence, helping machines understand and adapt to human emotional states. Multimodal electrophysiological(ME) signals, such as EEG, GSR, respiration(Resp), and temperature(Temp), are effective biomarkers for reflecting changes in human emotions. However, using electrophysiological signals for emotion recognition faces challenges such as data scarcity, inconsistent labeling, and difficulty in cross-individual generalization. To address these issues, we propose ME-MHACL, a self-supervised contrastive learning-based multimodal emotion recognition method that can learn meaningful feature representations from unlabeled electrophysiological signals and use multi-head attention mechanisms for feature fusion to improve recognition performance. Our method includes two stages: first, we use the Meiosis method to group sample and augment unlabeled electrophysiological signals and design a self-supervised contrastive learning task; second, we apply the trained feature extractor to labeled electrophysiological signals and use multi-head attention mechanisms for feature fusion. We conducted experiments on two public datasets, DEAP and MAHNOB-HCI, and our method outperformed existing benchmark methods in emotion recognition tasks and had good cross-individual generalization ability.
Exploring Dual Model Knowledge Distillation for Anomaly Detection
Authors: Thomine Simon, Snoussi Hichem
Date: 2023-06-27 00:00:00
Proceeding: Preprint 2023 6
Tasks: Anomaly Detection, feature selection, Knowledge Distillation, model, Unsupervised Anomaly Detection

Unsupervised anomaly detection holds significant importance in large-scale industrial manufacturing. Recent methods have capitalized on the benefits of utilizing
a classifier pretrained on natural images to extract representative features from
specific layers. These extracted features are subsequently processed using various
techniques. Notably, memory bank-based methods have demonstrated exceptional accuracy; however, they often incur a trade-off in terms of latency.
This latency trade-off poses a challenge in real-time industrial applications
where prompt anomaly detection and response are crucial. Indeed, alternative
approaches such as knowledge distillation and normalized flow have demonstrated
promising performance in unsupervised anomaly detection while maintaining low
latency. In this paper, we aim to revisit the concept of knowledge distillation
in the context of unsupervised anomaly detection, emphasizing the significance
of feature selection. By employing distinctive features and leveraging different
models, we intend to highlight the importance of carefully selecting and utilizing relevant features specifically tailored for the task of anomaly detection. This
article introduces a novel approach based on dual model knowledge distillation
for anomaly detection. The proposed method leverages both deep and shallow
layers to incorporate various types of semantic information.
Benchmarking saliency methods for chest X-ray interpretation
Authors: Adriel Saporta, Xiaotong Gui, Ashwin Agrawal, Anuj Pareek, Steven Q. H. Truong, Chanh D. T. Nguyen, Van-Doan Ngo, Jayne Seekins, Francis G. Blankenberg, Andrew Y. Ng, Matthew P. Lungren, Pranav Rajpurkar
Date: 2022-10-10 00:00:00
Proceeding: Nature Machine Intelligence 2022 10
Tasks: Benchmarking, Decision Making, Diagnostic, Medical Image Segmentation

Saliency methods, which produce heat maps that highlight the areas of the medical image that influence model prediction, are often presented to clinicians as an aid in diagnostic decision-making. However, rigorous investigation of the accuracy and reliability of these strategies is necessary before they are integrated into the clinical setting. In this work, we quantitatively evaluate seven saliency methods, including Grad-CAM, across multiple neural network architectures using two evaluation metrics. We establish the first human benchmark for chest X-ray segmentation in a multilabel classification set-up, and examine under what clinical conditions saliency maps might be more prone to failure in localizing important pathologies compared with a human expert benchmark. We find that (1) while Grad-CAM generally localized pathologies better than the other evaluated saliency methods, all seven performed significantly worse compared with the human benchmark, (2) the gap in localization performance between Grad-CAM and the human benchmark was largest for pathologies that were smaller in size and had shapes that were more complex, and (3) model confidence was positively correlated with Grad-CAM localization performance. Our work demonstrates that several important limitations of saliency methods must be addressed before we can rely on them for deep learning explainability in medical imaging.
A large language model-assisted education tool to provide feedback on open-ended responses
Authors: Jordan K. Matelsky, Felipe Parodi, Tony Liu, Richard D. Lange, Konrad P. Kording
Date: 2023-07-25 00:00:00
Tasks: Language Modeling, Language Modelling, Large Language Model, Math, Multiple-choice

Open-ended questions are a favored tool among instructors for assessing student understanding and encouraging critical exploration of course material. Providing feedback for such responses is a time-consuming task that can lead to overwhelmed instructors and decreased feedback quality. Many instructors resort to simpler question formats, like multiple-choice questions, which provide immediate feedback but at the expense of personalized and insightful comments. Here, we present a tool that uses large language models (LLMs), guided by instructor-defined criteria, to automate responses to open-ended questions. Our tool delivers rapid personalized feedback, enabling students to quickly test their knowledge and identify areas for improvement. We provide open-source reference implementations both as a web application and as a Jupyter Notebook widget that can be used with instructional coding or math notebooks. With instructor guidance, LLMs hold promise to enhance student learning outcomes and elevate instructional methodologies.
Anti-Distillation Backdoor Attacks: Backdoors Can Really Survive in Knowledge Distillation
Authors: Yunjie Ge, Qian Wang, Baolin Zheng, Xinlu Zhuang, Qi Li, Chao Shen, Cong Wang
Date: 2021-10-24 00:00:00
Proceeding: MM - Proceedings of the ACM International Conference on Multimedia 2021 10
Tasks: Backdoor Attack, Knowledge Distillation

Motivated by resource-limited scenarios, knowledge distillation (KD) has received growing attention, effectively and quickly producing lightweight yet high-performance student models by transferring the dark knowledge from large teacher models. However, many pre-trained teacher models are downloaded from public platforms that lack necessary vetting, posing a possible threat to knowledge distillation tasks. Unfortunately, thus far, there has been little research to consider the backdoor attack from the teacher model into student models in KD, which may pose a severe threat to its wide use. In this paper, we, for the first time, propose a novel Anti-Distillation Backdoor Attack (ADBA), in which the backdoor embedded in the public teacher model can survive the knowledge distillation process and thus be transferred to secret distilled student models. We first introduce a shadow to imitate the distillation process and adopt an optimizable trigger to transfer information to help craft the desired teacher model. Our attack is powerful and effective, which achieves 95.92%, 94.79%, and 90.19% average success rates of attacks (SRoAs) against several different structure student models on MNIST, CIFAR-10, and GTSRB, respectively. Our ADBA also performs robustly under different user distillation environments with 91.72% and 92.37% average SRoAs on MNIST and CIFAR-10, respectively. Finally, we show that the ADBA has a low overhead in the injecting process, which converges on 50 and 70 epochs on CIFAR-10 and GTSRB, respectively, while the normal training epochs of these datasets are almost 200.