Reviewerly/exHarmony huggingface dataset:
Multiple-objective optimization applied in extracting multiple-choice tests

Student evaluation is an essential part of education and is usually done through examinations. These examinations generally use tests consisting of several questions as crucial factors to determine the quality of the students. Test-making can be thought of as a multi-constraint optimization problem. However, the test-making process that is done by either manually or randomly picking questions from question banks still consumes much time and effort. Besides, the quality of the tests generated is usually not good enough. The tests may not entirely satisfy the given multiple constraints such as required test durations, number of questions, and question difficulties. In this paper, we propose parallel strategies, in which parallel migration is based on Pareto optimums, and applyan improved genetic algorithm called a genetic algorithm combined with simulated annealing, GASA, which improves diversity and accuracy of the individuals by encoding schemes and a new mutation operator of GA to handle the multiple objectives while generating multiple choice-tests from a large question bank. The proposed algorithms can use the ability to exploit historical information structure in the discovered tests, and use this to construct desired tests later. Experimental results show that the proposed approaches are efficient and effective in generating valuable tests that satisfy specified requirements. In addition, the results, when compared with those from traditional genetic algorithms, are improved in several criteria including execution time, search speed, accuracy, solution diversity, and algorithm stability.
Grand Theft App: Digital Forensics of Vehicle Assistant Apps

Due to the increasing connectivity of modern vehicles, collected data is no longer only stored in the vehicle itself but also transmitted to car manufacturers and vehicle assistant apps. This development opens up new possibilities for digital forensics in criminal investigations involving modern vehicles. This paper deals with the digital forensic analysis of vehicle assistant apps of eight car manufacturers. We reconstruct the driver's activities based on the data stored on the smartphones and in the manufacturer's backend.
Role Discovery-Guided Network Embedding Based on Autoencoder and Attention Mechanism

Recently, network embedding (NE) is an amazing research point in complex networks and devoted to a variety of tasks. Nearly, all the methods and models of NE are based on the local, high-order, or global similarity of the networks, and few studies have focused on the role discovery or structural similarity, which is of great significance in spreading dynamics and network theory. Meanwhile, existing NE models for role discovery suffer from two limitations, that is: 1) they fail to model the varying dependencies between each node and its neighbor nodes and 2) they cannot capture the effective node features which are helpful to role discovery, which makes these methods ineffective when applied to the role discovery task. To solve the above problems of NE for role discovery or structural similarity, we propose a unified deep learning framework, called RDAA, which can effectively represent features of nodes and benefit the Role Discovery-guided NE with a deep autoencoder, while modeling the local links with an Attention mechanism. In addition, we design an elaborately binding technique to combine both parts and optimize the framework in a unified way. We conduct different experiments, including visualization, role classification, role discovery, and running time compared to popular NE methods for both proximity and structural similarity. The RDAA has better performance on all the datasets and achieves good tradeoffs.
IOI

We present In-network Optical Inference (IOI), a system providing low-latency machine learning inference by leveraging programmable switches and optical matrix multiplication. IOI consists of a novel transceiver module designed specifically to perform linear operations such as matrix multiplication in the optical domain. IOI's transceivers are plugged into programmable switches to perform non-linear activation and respond to inference queries. We demonstrate how to process inference queries inside the network, without the need to send the queries to cloud or edge inference servers, thus significantly reducing end-to-end inference latency experienced by users. We believe IOI is the next frontier for exploring real-time machine learning systems and opens up exciting new opportunities for low-latency in-network inference.
Machine Learning Explainability and Robustness

This tutorial examines the synergistic relationship between explainability methods for machine learning and a significant problem related to model quality: robustness against adversarial perturbations. We begin with a broad overview of approaches to explainable AI, before narrowing our focus to post-hoc explanation methods for predictive models. We discuss perspectives on what constitutes a "good'' explanation in various settings, with an emphasis on axiomatic justifications for various explanation methods. In doing so, we will highlight the importance of an explanation method's faithfulness to the target model, as this property allows one to distinguish between explanations that are unintelligible because of the method used to produce them, and cases where a seemingly poor explanation points to model quality issues. Next, we introduce concepts surrounding adversarial robustness, including adversarial attacks as well as a range of corresponding state-of-the-art defenses. Finally, building on the knowledge presented thus far, we present key insights from the recent literature on the connections between explainability and robustness, showing that many commonly-perceived explainability issues may be caused by non-robust model behavior. Accordingly, a careful study of adversarial examples and robustness can lead to models whose explanations better appeal to human intuition and domain knowledge.
Effect of Polite Triggers in Chatbot Conversations on User Experience across Gender, Age, and Personality

Chatbots are one of the emerging intelligent systems which interact with customers to solve different queries in a wide range of domain areas. During social interaction, politeness plays a vital role in achieving effective communication. Consequently, it becomes essential to understand how a chatbot’s politeness affects user experience during the interaction. To understand it, we conducted a between-subject user study with two chatbots where one of the chatbots employs polite triggers, and the other one replies intending to answer the queries. To introduce politeness in normal chatbot responses, we used the state-of-the-art tag and generate approach. We first analyzed how different personality traits influence the response of individual persons to polite triggers. In addition, we also investigated the effects of polite triggers among different genders and age groups using a cross-sectional analysis.
Inter-species cell detection - datasets on pulmonary hemosiderophages in equine, human and feline specimens

Pulmonary hemorrhage (P-Hem) occurs among multiple species and can have various causes. Cytology of bronchoalveolar lavage fluid (BALF) using a 5-tier scoring system of alveolar macrophages based on their hemosiderin content is considered the most sensitive diagnostic method. We introduce a novel, fully annotated multi-species P-Hem dataset, which consists of 74 cytology whole slide images (WSIs) with equine, feline and human samples. To create this high-quality and high-quantity dataset, we developed an annotation pipeline combining human expertise with deep learning and data visualisation techniques. We applied a deep learning-based object detection approach trained on 17 expertly annotated equine WSIs, to the remaining 39 equine, 12 human and 7 feline WSIs. The resulting annotations were semi-automatically screened for errors on multiple types of specialised annotation maps and finally reviewed by a trained pathologist. Our dataset contains a total of 297,383 hemosiderophages classified into five grades. It is one of the largest publicly available WSIs datasets with respect to the number of annotations, the scanned area and the number of species covered.
Neural Unsupervised Semantic Role Labeling

The task of semantic role labeling ( SRL ) is dedicated to finding the predicate-argument structure. Previous works on SRL are mostly supervised and do not consider the difficulty in labeling each example which can be very expensive and time-consuming. In this article, we present the first neural unsupervised model for SRL. To decompose the task as two argument related subtasks, identification and clustering, we propose a pipeline that correspondingly consists of two neural modules. First, we train a neural model on two syntax-aware statistically developed rules. The neural model gets the relevance signal for each token in a sentence, to feed into a BiLSTM, and then an adversarial layer for noise-adding and classifying simultaneously, thus enabling the model to learn the semantic structure of a sentence. Then we propose another neural model for argument role clustering, which is done through clustering the learned argument embeddings biased toward their dependency relations. Experiments on the CoNLL-2009 English dataset demonstrate that our model outperforms the previous state-of-the-art baseline in terms of non-neural models for argument identification and classification.
Ghost-Free HDR Imaging Via Unrolling Low-Rank Matrix Completion

We propose a ghost-free high dynamic range (HDR) image synthesis algorithm by unrolling low-rank matrix completion. By exploiting the low-rank structure of the irradiance maps from low dynamic range (LDR) images, we formulate ghost-free HDR imaging as a general low-rank matrix completion problem. Then, we solve the problem iteratively using the augmented Lagrange multiplier (ALM) method. At each iteration, the optimization variables are updated by closed-form solutions and the regularizers are updated by learned deep neural networks. Experimental results show that the proposed algorithm provides better image qualities with fewer visual artifacts compared to state-of-the-art algorithms.
Research on the Innovation of Teaching Mode of the University English Hierarchical Listening and Speaking under the “Internet+” Era Based on the Analysis of Big Data

Abstract With the gradual acceleration of the process of world economic integration, the exchanges between China’s economic trade and the international community have become more frequent. At the same time, the demand for high quality English talents is also increasing in our society. The popularity of computer networks has provided a lot of help for colleges and universities to train professional English talents. However, according to the analysis of big data, some college English teaching problems in the Internet environment have also been exposed, and the stratified teaching mode provides a new way to solve the problems of English listening and speaking in the “Internet +” era. This paper briefly introduces the challenges faced by college English listening and speaking teaching under the “Internet +” environment, and puts forward the construction method of English listening and speaking teaching mode, in order to comprehensively improve the English teaching level in colleges and universities, and promote the development and progress of English teaching in colleges and universities [1].
Systematic Analysis of Circular Artifacts for Stylegan

Recent research works have pointed out that the synthesized images by StyleGAN contain prominent circular artifacts which severely degrade the quality of generated images. In this work, we provide a systematic investigation on how those circular artifacts are formed by studying the functionalities of different modules that are used in the Style-GAN architecture. We present both analysis of the StyleGAN mechanism and extensive experiments to verify our claims. The key modules of StyleGAN that promote such undesired artifacts are highlighted based on the analysis. Besides, we propose a simple yet effective solution to remove the prominent circular artifacts for StyleGAN, by applying a simple but efficient pixel-instance normalization layer. The improved StyleGAN model trained via our proposed approach successfully prevents the appearance of circular artifacts in the generated images.
Explainable reinforcement learning for broad-XAI: a conceptual framework and survey

Abstract Broad-XAI moves away from interpreting individual decisions based on a single datum and aims to provide integrated explanations from multiple machine learning algorithms into a coherent explanation of an agent’s behaviour that is aligned to the communication needs of the explainee. Reinforcement Learning (RL) methods, we propose, provide a potential backbone for the cognitive model required for the development of Broad-XAI. RL represents a suite of approaches that have had increasing success in solving a range of sequential decision-making problems. However, these algorithms operate as black-box problem solvers, where they obfuscate their decision-making policy through a complex array of values and functions. EXplainable RL (XRL) aims to develop techniques to extract concepts from the agent’s: perception of the environment; intrinsic/extrinsic motivations/beliefs; Q-values, goals and objectives. This paper aims to introduce the Causal XRL Framework (CXF), that unifies the current XRL research and uses RL as a backbone to the development of Broad-XAI. CXF is designed to incorporate many standard RL extensions and integrated with external ontologies and communication facilities so that the agent can answer questions that explain outcomes its decisions. This paper aims to: establish XRL as a distinct branch of XAI; introduce a conceptual framework for XRL; review existing approaches explaining agent behaviour; and identify opportunities for future research. Finally, this paper discusses how additional information can be extracted and ultimately integrated into models of communication, facilitating the development of Broad-XAI.
Feature assisted cervical cancer screening through DIC cell images

The mortality rate of cervical cancer is increasing alarmingly. Conventional cytological methods are not always efficient to diagnose cancer at an early stage. Several label-free, quantitative screening approaches are emerging rapidly for fast and accurate detection of cervical cancer. Differential interference contrast (DIC) imaging is one of such label-free methods for the detection of cellular abnormality. The combination of DIC imaging and prediction algorithm enables the development of an efficient computer-aided diagnosis (CAD) system for cervical cancer detection at an early stage. In the present study, the DIC dataset is categorized into 2-classes (abnormal and normal) and 3-classes (normal, precancer, and squamous cell carcinoma). After segmentation of the cells using the modified valley-based Otsu's thresholding method, three classifiers, namely support vector machine (SVM), multilayer perceptron (MLP), and k-nearest neighbour (k-NN) are applied. Further, to improve the classification performances, principal component analysis (PCA) is applied for feature selection. The experimental results reveal that the SVM classifier has the greatest accuracy of 0.97 (2-class classification) and 0.90 (3-class classification).
Detection of Low-toxic Texts in Similar Sets Using a Modified XLM-RoBERTa Neural Network and Toxicity Confidence Parameters

The article considers the problem of classifying low-toxic texts using a modified neural network of the XLM-RoBERTa transformer architecture, trained on highly toxic texts. Comments from the School of Pedagogical Design at the University of 20.35 were used as kits for identifying low-toxic texts. The network was not retrained on low-toxic texts. Instead, the classification of low-toxic texts was carried out by varying the toxicity confidence parameter. An approximation dependence of the number of low-toxic texts on the parameter of toxicity reliability was constructed and a threshold value of the toxicity reliability parameter was obtained, at which the quality of the classification of low-toxic texts is maximal. The hypothesis of the similarity of the toxicity of homogeneous information resources was also formulated and confirmed.
Hybrid Visual Servoing Tracking Control of Uncalibrated Robotic Systems for Dynamic Dwarf Culture Orchards Harvest

The paper is concerned with the dynamic tracking problem of SNAP orchards harvesting robots in the presence of multiple uncalibrated model parameters in the application of dwarf culture orchards harvest. A new hybrid visual servoing adaptive tracking controller and three adaptive laws are proposed to guarantee harvesting robots to finish the dynamic harvesting task and the adaption to unknown parameters including camera intrinsic and extrinsic model and robot dynamics. By the Lyapunov theory, asymptotic convergence of the closed-loop system with the proposed control scheme is rigorously proven. Experimental and simulation results have been conducted to verify the performance of the proposed control scheme. The results demonstrate its effectiveness and superiority.
Explainability for Natural Language Processing

This lecture-style tutorial, which mixes in an interactive literature browsing component, is intended for the many researchers and practitioners working with text data and on applications of natural language processing (NLP) in data science and knowledge discovery. The focus of the tutorial is on the issues of transparency and interpretability as they relate to building models for text and their applications to knowledge discovery. As black-box models have gained popularity for a broad range of tasks in recent years, both the research and industry communities have begun developing new techniques to render them more transparent and interpretable. Reporting from an interdisciplinary team of social science, human-computer interaction (HCI), and NLP/knowledge management researchers, our tutorial has two components: an introduction to explainable AI (XAI) in the NLP domain and a review of the state-of-the-art research; and findings from a qualitative interview study of individuals working on real-world NLP projects as they are applied to various knowledge extraction and discovery at a large, multinational technology and consulting corporation. The first component will introduce core concepts related to explainability in NLP. Then, we will discuss explainability for NLP tasks and report on a systematic literature review of the state-of-the-art literature in AI, NLP and HCI conferences. The second component reports on our qualitative interview study, which identifies practical challenges and concerns that arise in real-world development projects that require the modeling and understanding of text data.
Predicting information security culture among employees of telecommunication companies in an emerging market

Purpose The purpose of this study is to examine factors, which influence information security culture among employees of telecommunications companies. The motivation for this study was the rise in the number of data breach incidents caused by the organizations’ own employees. Design/methodology/approach A total of 139 usable responses were collected via a Web-based questionnaire survey from employees of Malaysian telecommunications companies. Data were analysed by using SmartPLS 3. Findings Security education, training and awareness (SETA) programmes and information security awareness were found to have a positive and significant impact on Information Security Culture. Additionally, self-reported employees’ security behaviour was found to act as a partial mediator on the relationship between information security awareness and information security culture. Research limitations/implications The study was cross-sectional in nature. Therefore, it could not measure changes in population over time. Practical implications The empirical data provides a new perspective on significant elements that influence information security culture in an emerging market. Organizations in the telecommunications industry can now recognize that SETA programmes and information security awareness have a significant impact on information security culture. Employees’ security behaviour also mediates the relationship between information security awareness and information security culture. Originality/value This is the first study to analyse the mediating effect of employees’ security behaviour on the relationship between information security awareness and information security culture in the Malaysian telecommunications context.
Privacy-Preserving Boosting in the Local Setting

In machine learning, boosting is one of the most popular methods that is designed to combine multiple base learners into a superior one. The well-known Boosted Decision Tree classifier has been widely adopted in data mining and pattern recognition. With the emerging challenge in privacy, the personal images, browsing history, and financial reports, which are held by individuals and entities are more likely to contain sensitive information. The privacy concern is intensified when the data leaves the hand of owners and is used for further mining. Such privacy issues demand that the machine learning algorithms should be privacy-aware. Recently, Local Differential Privacy has been proposed as an effective privacy protection approach, which allows data owners to perturb the data before any release. In this paper, we propose a distributed privacy-preserving boosting algorithm that can be applied to various types of classifiers. By adopting LDP as a building block, the proposed boosting algorithm leverages the aggregation of the perturbed data shares to build the base learner, which ensures that privacy is well preserved for the participated data owners. Our experiments demonstrate that the proposed algorithm effectively boosts various classifiers and the boosted classifiers maintain a high utility.
A Tilt-Angle Face Dataset And Its Validation

Since the surveillance cameras are usually mounted at a high position to overlook targets, tilt-angle faces on overhead view are common in the public video surveillance environment. Face recognition approaches based on deep learning models have achieved excellent performance, but there remains a large gap for the overlooking surveillance scenarios. The results of face recognition depend not only on the structure of the model, but also on the completeness and diversity of the training samples. The existing multi-pose face datasets do not cover complete top-view face samples, and the models trained by them thus cannot provide satisfactory accuracy. To this end, this paper pioneers a multi-view tilt-angle face dataset (TFD), which is collected with an elaborately devised overhead capture equipment. TFD contains 11,124 face images from 927 subjects, covering a variety of tilt angles on the overhead view. To verify the validity of the constructed dataset, we further conduct comprehensive face detection and recognition experiments using the corresponding models trained by WiderFace, Webface and our TFD, respectively. Experimental results show that our TFD substantially promotes the face detection and recognition accuracy under the top-view situation. TFD is available at https://github.com/huang1204510135/D FD.