A Wireless Power Transfer Based Implantable ECG Monitoring Device

Implantable medical devices (IMDs) enable patients to monitor their health anytime and receive treatment anywhere. However, due to the limited capacity of a battery, their functionalities are restricted, and the devices may not achieve their intended potential fully. The most promising way to solve this limited capacity problem is wireless power transfer (WPT) technology. In this study, a WPT based implantable electrocardiogram (ECG) monitoring device that continuously records ECG data has been proposed, and its effectiveness is verified through an animal experiment using a rat model. Our proposed device is designed to be of size 24 x 27 x 8 mm, and it is small enough to be implanted in the rat. The device transmits data continuously using a low power Bluetooth Low Energy (BLE) communication technology. To charge the battery wirelessly, transmitting (Tx) and receiving (Rx) antennas were designed and fabricated. The animal experiment results clearly showed that our WPT system enables the device to monitor the ECG of a heart in various conditions continuously, while transmitting all ECG data in real-time.11Ysciescopu

The Nature of Korean Legal Culture and Challenges of Law Related Education in Civic Education

An earlier version of this article was presented at the 2008 International Conference on Korean Studies : Cultural Transaction between East and West, Institut fur Orient und Asienwissenschaften, Universitat Bonn, July 2008.Generally speaking, the legal culture influences validity and appropriateness of learning contents in law-related education. The purpose of this study is to comprehend marked characteristics of Korean legal culture and to seek implication for developing appropriate learning contents of law-related education in civic education. Because of the impact of Confucian ideas on Korean legal culture after Choson Dynasty, there is a little tendency to perceive that law is not a facilitative tool for protecting individual rights but simply a punitive tool for compelling ritual norms. Also Confucian ideas have an impact on Korean legal culture which regards private connection as important since private ritual norms are considered much more important than law. These characteristics of Korean legal culture remained up to now, because of unhappy historical experiences, for example, The Japanese colonial days, ideological conflict and social disorder after Liberation and Korean War. But these days, much changes are occurring in the cultural context of Korean society such as improvement of social structure, facing a multicultural society, emphasis on trust, emphasis on citizenship internalization, preparation the unification and globalization, and many others. According to these changes in the cultural context, for developing Korean civil society, law-related education in civic education should focus on reinforcement of learning legal cultural in formal curriculum, cultivation of positive legal consciousness, strengthening a participatory attitude, training a legal consideration, institutionalization of conflict resolve, and development of a legal consciousness in everyday life

Current status of convective clouds discrimination in NMSC/KMA

Póster presentado en: 3rd European Nowcasting Conference, celebrada en la sede central de AEMET en Madrid del 24 al 26 de abril de 2019

PU GNN: Chargeback Fraud Detection in P2E MMORPGs via Graph Attention Networks with Imbalanced PU Labels

The recent advent of play-to-earn (P2E) systems in massively multiplayer online role-playing games (MMORPGs) has made in-game goods interchangeable with real-world values more than ever before. The goods in the P2E MMORPGs can be directly exchanged with cryptocurrencies such as Bitcoin, Ethereum, or Klaytn via blockchain networks. Unlike traditional in-game goods, once they had been written to the blockchains, P2E goods cannot be restored by the game operation teams even with chargeback fraud such as payment fraud, cancellation, or refund. To tackle the problem, we propose a novel chargeback fraud prediction method, PU GNN, which leverages graph attention networks with PU loss to capture both the players' in-game behavior with P2E token transaction patterns. With the adoption of modified GraphSMOTE, the proposed model handles the imbalanced distribution of labels in chargeback fraud datasets. The conducted experiments on three real-world P2E MMORPG datasets demonstrate that PU GNN achieves superior performances over previously suggested methods.Comment: Under Review, Industry Trac