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14th International Conference on Information and Communication Technology Convergence, ICTC 2023

作者： Kim, Moonbeom Paek, Jeongyeup Chung-Ang University Department of Computer Science & Engineering Seoul Korea Republic of

ISBN: (纸本)9798350313277

Bluetooth Low Energy (BLE) is positioned as a representative wireless technology in Internet of Things (IoT) applications and systems. It enables communication with multiple device at low-power and includes diverse features for providing various services with high-quality. However, the Bluetooth specification does not specify the resource management and scheduling mechanisms for multiple connections. Since each connection is independently handled, achieving optimized schedule is an important research topic in Bluetooth networks. To address these challenges, we propose a "Fair Multi-Connection Scheduling"(FM-Schedule), which schedules and allocates resources for new connections taking into account the requirements of previously connected peripherals. We implements FM-Schedule on real embedded devices, and evaluate its performance compared to popular BLE stacks (i.g. NimBLE, Zephyr OS, and Nordic) in real environment. © 2023 IEEE.

关键词： Bluetooth Low Energy (BLE) IEEE 802.15.1 Multi-Connection Scheduling Resource Fairness

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Experimental Analysis of the Recent Key Recovery Protocol with respect to Commitment Schemes 14

Experimental Analysis of the Recent Key Recovery Protocol wi...

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14th International Conference on Information and Communication Technology Convergence, ICTC 2023

作者： Choi, Seongbong Son, Yongseok Paek, Jeongyeup Lee, Hyung Tae Chung-Ang University School of Computer Science and Engineering Seoul Korea Republic of

ISBN: (纸本)9798350313277

Recently, Kim et al. proposed a key recovery protocol for (t, n)-threshold ECDSA schemes that enables a user who lost his secret share to recover with the aid of other t users among n users [1]. In their protocol, a commitment scheme was employed to commit to messages, but they provided implementation results of their protocol by employing the Feldman commitment scheme only. In this paper, we examine the efficiency of their protocol with respect to commitment schemes by implementing them. More precisely, we implement the protocol by employing hash-based and Pedersen commitment schemes each as well as the Feldman commitment scheme. Our experimental results show that the hash-based commitment scheme provides the most efficient protocol than other commitment schemes. For example, when t = 3 with 128-bit security, the protocol with the hash-based commitment requires 0.485 ms in total for all computations, while the protocols with Feldman and Pedersen commitment schemes take 7.713 ms and 15.228 ms in total, which improve by factors of about 15.90 and 31.40, respectively. © 2023 IEEE.

关键词： commitment schemes hash-based commitment Key recovery protocol Pedersen commitment threshold ECDSA

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UAV-Satellite Integration for Communication System: Potential Applications and Key Challenges 14

UAV-Satellite Integration for Communication System: Potentia...

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14th International Conference on Information and Communication Technology Convergence, ICTC 2023

作者： Do, Quang Tuan Tran, Anh-Tien Lakew, Demeke Shumeye Kim, Hyosu Son, Yongseok Lee, Hyung Tae Paek, Jeongyup Cho, Sungrae Chung-Ang University School of Computer Science and Engineering Seoul Korea Republic of

ISBN: (纸本)9798350313277

Unmanned aerial vehicle (UAV) and satellite integration has become an evolution in communication systems. This study explores the synergistic potential of UAV-satellite integration, along with its applications, difficulties, and potential future prospects. While satellites provide a wider geographical reach, UAVs increase localized coverage and flexibility. This combination shows potential for numerous applications like disaster response, environmental monitoring, remote connectivity, and scientific research campaigns. Coordination of the network, energy efficiency, security, signal interference, and many more are currently the issues we need to pay attention to in this system. Swarm intelligence, AI-driven decision-making, and hybrid communication architectures are promising study areas in the future. As the UAV-satellite integration process advances, it reshapes communication standards and offers unprecedented efficiency and connectivity. © 2023 IEEE.

关键词： Satellite UAV-Satellite Integration Unmanned Aerial Vehicles (UAVs) Wireless Communication

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Mimicking GFSK Modulation for WiFi-to-BLE Cross Technology Communication 14

Mimicking GFSK Modulation for WiFi-to-BLE Cross Technology C...

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14th International Conference on Information and Communication Technology Convergence, ICTC 2023

作者： Lee, Chaeyeong Kim, Moonbeom Cho, Sungrae Paek, Jeongyeup Chung-Ang University Department of Computer Science & Engineering Seoul Korea Republic of

ISBN: (纸本)9798350313277

In the 2.4 GHz ISM band, mutual interference occurs due to the excessive competition for channel resources among various wireless network technologies that adopt different physical (PHY) and MAC standards. To address this issue, cross technology communication (CTC) techniques facilitate direct communication between heterogeneous wireless technologies in the overlapped frequencies. In this paper, we propose a novel method for WiFi-to-BLE CTC that makes a WiFi signal appear like BLE's Gaussian frequency shift keying (GFSK) signal. This method has not been attempted in previous PHY-CTC studies. The possibility of the newly suggested approach is demonstrated through the GNURadio simulations. © 2023 IEEE.

关键词： Blue-tooth Low Energy (BLE) Cross Technology Communication GFSK OFDM WiFi

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A Recent Reinforcement Learning Trend for Vehicular Ad Hoc Networks Routing 14

A Recent Reinforcement Learning Trend for Vehicular Ad Hoc N...

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14th International Conference on Information and Communication Technology Convergence, ICTC 2023

作者： Kim, Woongsoo Min, Junhong Son, Yongseok Paek, Jeongyeup Chung-Ang University Department of Computer Science & Engineering Seoul Korea Republic of

ISBN: (纸本)9798350313277

Vehicular ad hoc networks (VANETs) are one of the most essential parts of intelligent transportation system (ITS). VANETs fulfill a crucial role in continuous traffic monitoring, emergency message transmission, and in-vehicle infotainment services. Given the short communication distance, constraints of unpredictable traffic environments, and the dynamic topology caused by high mobility, effective VANET routing is vital for network performance. However, prior ad hoc routing schemes in the literature are unsuitable for VANETs dynamic environments. For this reason, recent works focusing on VANETs have proposed reinforcement learning (RL)-based approaches. In this paper, we survey the literature that tackles the VANET routing problem using RL, summarizing which RL algorithms are used and their optimization goals. In addition, we analyze and discuss the limitations of RL-based approaches to propose guidelines for promising VANET routing solutions for constructing the future of ITS. © 2023 IEEE.

关键词： Intelligent Transportation System (ITS) Reinforcement Learning Routing Vehicular Ad Hoc Networks (VANETs)

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Surface-Assisted In-Air Gesture Recognition 14

Surface-Assisted In-Air Gesture Recognition

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14th International Conference on Information and Communication Technology Convergence, ICTC 2023

作者： Kim, Minhyeok Lee, Donghun Kim, Hyosu Chung-Ang University School of Computer Science and Engineering Seoul Korea Republic of

ISBN: (纸本)9798350313277

In-air hand gestures can be effectively utilized to support immersive interactions in an online meeting. In this study, we propose a novel system to support in-air hand gestures by leveraging the vibrations introduced by the gestures. When a user makes hand gestures while putting her elbow on a table, vibrations are produced due to the gestures and travel through the table's surface. Based on this observation, we collect gesture-driven vibrations and use them for gesture recognition. Our evaluations with real-world users demonstrate that we can precisely recognize in-air hand gestures (e.g., an average accuracy of 96.02%) using only commercial devices, such as smartphones and smartwatches. © 2023 IEEE.

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Unified Framework for End-User Authentication Protocol in Feature-as-a-Service Models 14

Unified Framework for End-User Authentication Protocol in Fe...

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14th International Conference on Information and Communication Technology Convergence, ICTC 2023

作者： Ahn, Jaehyung Min, Junhong Lee, Hyung Tae Paek, Jeongyeup Chung-Ang University Department of Computer Science & Engineering Seoul Korea Republic of

ISBN: (纸本)9798350313277

Feature-as-a-Service (FaaS) is a new cloud computing model that simplifies the implementation of new features in existing apps with minimal code modifications. One of the most important characteristics of FaaS is that the FaaS server manages its data independently of the service server. However, such a FaaS scheme has a potential issue. Specifically, in the FaaS server, authenticating end-users can be a problem because the service server usually manages user and authentication data. Although several FaaS products requiring end-user authentication have their own authentication methods to address this problem, there is no industry standard for a FaaS server to authenticate an end-user;i.e., commercial FaaS products have individualized end-user authentication methods. In this paper, we analyze existing FaaS products and propose an introductory guideline about end-user authentication methods for FaaS. This guideline aims to help FaaS customers understand the FaaS's authentication and suggest implementation direction. © 2023 IEEE.

关键词： Authentication Cloud Computing Feature as a Service (FaaS) Guideline Protocol System as a Service (SaaS)

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Full-Face Animation for a Virtual Reality Avatar 25th

Full-Face Animation for a Virtual Reality Avatar

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25th International Conference on Human-computer Interaction, HCII 2023

作者： Hwang, Jewoong Park, Kyoungju School of Computer Science and Engineering Chung-Ang University Seoul Korea Republic of

ISBN: (纸本)9783031360039

This research paper proposes a real-time and realistic full facial animation method for virtual reality (VR) applications. Currently, VR applications lack natural upper-face animation, which limits the immersive experiences of self-avatars. Our proposed approach combines existing lip-sync methods for the lower part of the face with a deep-learning method for the upper part. This allows us to achieve natural full-face animation with minimal latency and high computational efficiency. We demonstrate the effectiveness of our approach through experimental results and show that it is suitable for use in VR applications. Our proposed method can help to enhance the realism and immersion of self-avatars in the metaverse. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Virtual reality

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Liquid metal composites:Recent advances and applications

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International Journal of Minerals,Metallurgy and Materials 2025年第5期32卷 1008-1024页

作者： chunghyeon Choi Liyang Liu Byungil Hwang Department of Intelligent Semiconductor Engineering Chung-Ang UniversitySeoul 06974Rep.of Korea Department of Chemistry and Chemical Engineering Chalmers University of TechnologyGothenburg SE-41296Sweden Wallenberg Wood Science Center Chalmers University of TechnologyGothenburg SE-41296Sweden School of Integrative Engineering Chung-Ang UniversitySeoul 06974Rep.of Korea

Liquid metals(LMs),because of their ability to remain in a liquid state at room temperature,render them highly versatile for applications in electronics,energy storage,medicine,and *** various LMs,Ga-based LMs exhibit minimal cytotoxicity,low viscosity,high thermal and electrical conductivities,and excellent ***,Ga-based LM composites(LMCs)have emerged as a recent research *** advancements have focused on novel fabrication techniques and applications spanning energy storage,flexible electronics,and biomedical *** noteworthy are the developments in wearable sensors and electronic skins,which hold promise for healthcare monitoring and human-machine *** their potential,challenges,such as oxidative susceptibil-ity and biocompatibility,*** bio-based LMC materials is a promising approach to address these issues while exploring new avenues to optimize LMC performance and broaden its application *** review provides a concise overview of the recent trends in LMC research,highlights their transformative impacts,and outlines key directions for future investigation and development.

关键词： composites liquid metal polymer applications alloys

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POTF: Prompt-based Object-centric Tensorial Field 15

POTF: Prompt-based Object-centric Tensorial Field

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15th International Conference on Information and Communication Technology Convergence, ICTC 2024

作者： Lee, Seonghak Park, Jisoo Kwon, Junseok Chung-Ang University Department of Computer Science Seoul Korea Republic of Chung-Ang University Department of Artificial Intelligence Seoul Korea Republic of

ISBN: (纸本)9798350364637

Recent advancements reconstructing a 3D scene, particularly Neural Radiance Field (NeRF), have significantly en-hanced 3D scene synthesis through continuous implicit functions for volume rendering. However, real-world applications often require the reconstruction of specific regions or objects within a scene due to practical considerations such as computational efficiency and data storage limitations. To address these needs, we present Prompt-based Object-centric Tensorial Field (POTF), a novel approach that integrates user-directed segmentation via the Grounded Segment Anything Model (Grounded SAM) with efficient rendering capabilities utilizing tensor decomposition techniques. Our model allows precise segmentation based on image and text inputs, enabling dynamic and interactive refine-ment of the target regions. The tensor decomposition significantly improves reconstruction speed and quality by efficiently repre-sent the 3D radiance fields. POTF prioritizes the rendering of user-specified objects, optimizing computational resources while maintaining high fidelity in critical areas. This method offers a practical and adaptive solution for 3D scene synthesis, catering to the specific needs of various real-world applications. © 2024 IEEE.

关键词： Volume rendering

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