Explainable recommendation has gained great attention in recent years. A lot of work in this research line has chosen to use the knowledge graphs (KG) where relations between entities can serve as explanations. However, existing studies have not considered sentiment on relations in KG, although there can be various types of sentiment on relations worth considering (e.g., a user's satisfaction on an item). In this paper, we propose a novel recommendation framework based on KG integrated with sentiment analysis for more accurate recommendation as well as more convincing explanations. To this end, we first construct a Sentiment-Aware Knowledge Graph (namely, SAKG) by analyzing reviews and ratings on items given by users. Then, we perform item recommendation and reasoning over SAKG through our proposed Sentiment-Aware Policy Learning (namely, SAPL) based on a reinforcement learning strategy. To enhance the explainability for end-users, we further developed an interactive user interface presenting textual explanations as well as a collection of reviews related with the discovered sentiment. Experimental results on three real-world datasets verified clear improvements on both the accuracy of recommendation and the quality of explanations.

In this demo, we show MANIAC, a MAN-machIne collaborative system for malware Author Classification. It is developed to fight a number of author groups who have been generating lots of new malwares by sharing source code within a group and exploiting evasive schemes such as polymorphism and metamorphism. Notably, MANIAC allows users to intervene in the model's classification of malware authors with high uncertainty. It also provides effective interfaces and visualizations with users to achieve maximum classification accuracy with minimum human labor.

For these few decades malwares have been posing a major concern in the cyber security. Recently, a number of "author groups" have been generating lots of newmalwares by sharing source code within a group and exploiting evasive schemes such as polymorphism and metamorphism. This motivates us to study the problem of identifying the author group of a given malware, which would be able to work for not only blocking malwares but also legally punishing suspected malware authors. In this paper, we propose a human-machine collaborative approach for classifying author groups of malwares accurately. We also propose a visualization method for helping human experts to make the decision easily. We verify the superiority of our framework through extensive experiments using real-world malware data.

A recent EV trend is to increase the operating voltage of a propulsion motor to improve the efficiency and performance. To feed a high voltage to motor control unit, it generally employs a front-end bidirectional converter. Because the boosting operation of the converter produces a high output voltage, the converter needs an output capacitor, which has a high working voltage resulted in cost increasing. To solve the problem, we present a modified bidirectional converter, which can decreases the working voltage of the output capacitor. Basic characteristic of the proposed converter is similar to the conventional boost converter. The difference comes from the structure of the output terminal. The output capacitor is connected to the input battery in series. Owing to this circuit configuration, the working voltage of the output capacitor becomes lower than that of the conventional boost converter. After theoretical analysis, we carry out simulations and experiments to verify the validity and the performance comparing with the conventional converter.