Research at NCL

At NCL, we focus on developing dependable, scalable, and sustainable Cyber-Physical System (CPS). Broadly speaking, CPS is an informed integration of computing system and the environment within which the system operates. Our angles of investigation in CPS include real-time systems, fault-tolerant systems, and Internet-of-Things (IoT).

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Publications

Book Chapter

• Tsui, A. B. M., Wang, C., Tseng, J. J., Lo, M. L., & Liu, M. M. D. (2024). Teachers’ Language Awareness and Language Related Episodes (LRE) Revisited: The Case of EMI in Computer Engineering. In Language Issues in English Medium Instruction (pp. 100-120). Routledge.

Journal Papers

• Tseng Y, Wang C, Wei Y, Chiang Y. 2025. Cloud-edge MQTT messaging for latency mitigation and broker memory footprint reduction. PeerJ Computer Science 11:e2741 https://doi.org/10.7717/peerj-cs.2741.

• Peng, C.-S.; Wang, C. Adaptive Transmissions for Batteryless Periodic Sensing. IoT 2024, 5, 332-355. https://doi.org/10.3390/iot5020017.

• Lee, Y.-S.; Wang, C. A Cyber-Physical Testbed for IoT Microgrid Design and Validation. Electronics 2024, 13, 1181. https://doi.org/10.3390/electronics13071181.

• Chao Wang, Cheng-Hsun Chuang, Yu-Wei Chen, and Yun-Fan Chen. 2024. On Cyber-Physical Fault Resilience in Data Communication: A Case From A LoRaWAN Network Systems Design. ACM Trans. Cyber-Phys. Syst. 8, 3, Article 36 (July 2024), 25 pages. https://doi.org/10.1145/3639571.

• J. -R. Sun, N. Josephine, C. Wang and K. -C. Wang, “Interactive Occlusion-Free System for Accessible Volume Exploration,” in IEEE Access, vol. 11, pp. 86544-86560, 2023, doi: 10.1109/ACCESS.2023.3301567.

• Wu, J.-L.; Chang, P.-C.; Wang, C.; Wang, K.-C. ATICVis: A Visual Analytics System for Asymmetric Transformer Models Interpretation and Comparison. Appl. Sci. 2023, 13, 1595. https://doi.org/10.3390/app13031595

• Chao Wang, Christopher Gill, and Chenyang Lu. 2019. Real-Time Middleware for Cyber-Physical Event Processing. ACM Trans. Cyber-Phys. Syst. 3, 3, Article 29 (October 2019), 25 pages. https://doi.org/10.1145/3218816 (author copy)

• Yang, C-H., Ssu, K-F. and Wang, C. (2018) ‘Effects of vertex insertion on local rescheduling in wireless sensor networks’, Int. J. Ad Hoc and Ubiquitous Computing, Vol. 27, No. 3, pp.195–209. (author copy)

• C. Chou, K. Ssu, H. C. Jiau, W. Wang and C. Wang, “A Dead-End Free Topology Maintenance Protocol for Geographic Forwarding in Wireless Sensor Networks,” in IEEE Transactions on Computers, vol. 60, no. 11, pp. 1610-1621, Nov. 2011, doi: 10.1109/TC.2010.208. (author copy)

Conference Papers

• Kenneth Ong Kuan Phing, Bo Yu Chen, Po Wen Chi, and Chao Wang, “A Study of Fully Homomorphic Encryption with Evaluation Control,” accepted for publication at AsiaJCIS 2024 (Best Paper Award).

• G. -H. Li, Y. -T. Chiang and C. Wang, “Traffic-Aware Video Streaming Topology Reconfiguration for Smart City Applications,” 2024 13th Mediterranean Conference on Embedded Computing (MECO), Budva, Montenegro, 2024, pp. 1-4, doi: 10.1109/MECO62516.2024.10577778.

• P. -H. Chou, C. Wang and C. -S. Mei, “Applicability of Deep Learning Model Trainings on Embedded GPU Devices: An Empirical Study,” 2023 12th Mediterranean Conference on Embedded Computing (MECO), Budva, Montenegro, 2023, pp. 1-4, doi: 10.1109/MECO58584.2023.10155048.

• C. -E. Yu, C. Wang and S. -Q. Zhang, “Fault-Tolerant Energy-Efficient LoRaWAN Networking Architecture,” 2022 11th Mediterranean Conference on Embedded Computing (MECO), 2022, pp. 1-4, doi: 10.1109/MECO55406.2022.9797098.

• Wang, C., Gill, C., & Lu, C. (2020, April). Adaptive Data Replication in Real-Time Reliable Edge Computing for Internet of Things. In 2020 IEEE/ACM Fifth International Conference on Internet-of-Things Design and Implementation (IoTDI) (pp. 128-134). IEEE. (author copy; slides).

• Wang, C., Gill, C., & Lu, C. (2019, July). Frame: Fault tolerant and real-time messaging for edge computing. In 2019 IEEE 39th International Conference on Distributed Computing Systems (ICDCS) (pp. 976-985). IEEE. (author copy)

• Wang, C., Gill, C., & Lu, C. (2017, June). Real-time middleware for cyber-physical event processing. In 2017 IEEE/ACM 25th International Symposium on Quality of Service (IWQoS) (pp. 1-6). IEEE. (author copy)

• Wang, C., & Ssu, K-F. (2010, April). A distributed collision-free low-latency link scheduling scheme in wireless sensor networks. In 2010 IEEE Wireless Communication and Networking Conference (pp. 1-6). IEEE. (author copy)

Conference Posters

• Po-Hsuan Chou, Weining Song, Thiemo Voigt, Christian Rohner, and Chao Wang. 2023. Poster: A Battery-free Backscatter Communication System for Non-persistent Carriers. Accepted for publication at The International Conference on Embedded Wireless Systems and Networks (EWSN), Rende, Italy, September 25–27, 2023.

• Chia-Chin Chung, Chu-Chi Pai, Fu-Shiang Ching, Chao Wang, and Ling-Jyh Chen. 2022. When post-quantum cryptography meets the internet of things: an empirical study. In Proceedings of the 20th Annual International Conference on Mobile Systems, Applications and Services (MobiSys ‘22). Association for Computing Machinery, New York, NY, USA, 525–526. https://doi.org/10.1145/3498361.3538766

• Cheng-You Lin and Chao Wang. 2021. Benefits of GPU-CPU Task Replacement for Edge Device and Platform: Poster Abstract. In Proceedings of the International Conference on Internet-of-Things Design and Implementation (IoTDI ‘21). Association for Computing Machinery, New York, NY, USA, 249–250. (author copy)

• Cheng-En Yu and Chao Wang. 2021. Enabling a Flexible and Sustainable Smart Campus Networking Backbone Using LoRaWAN: Poster Abstract. In Proceedings of the International Conference on Internet-of-Things Design and Implementation (IoTDI ‘21). Association for Computing Machinery, New York, NY, USA, 251–252. (author copy)

• Chih-Shuo Mei and Chao Wang. 2021. Energy Efficiency and Timeliness in Model Training for Internet-of-Things Applications: Poster Abstract. In Proceedings of the International Conference on Internet-of-Things Design and Implementation (IoTDI ‘21). Association for Computing Machinery, New York, NY, USA, 253–254. (author copy)

• Shang Chih Chung and Chao Wang. 2021. Design of an Energy-Efficient End-to-End Messaging Protocol for Smart Cities: Poster Abstract. In Proceedings of the International Conference on Internet-of-Things Design and Implementation (IoTDI ‘21). Association for Computing Machinery, New York, NY, USA, 255–256. (author copy)

Presentation / Invited Talk

Conference Presentation

• Yih Shiuan Lee and Chao Wang. 2023. A Cyber-Physical Testbed for IoT Microgrid Design and Validation. International Conference on Innovation, Communication and Engineering (ICICE), Bangkok, Thailand, November 9–13, 2023.

• Jhong-Sian He and Chao Wang. 2023. Towards Indoor Illumination via Sunlight Reflectors Orchestration. The 8th International Conference on Cloud Computing and Internet of Things (CCIOT), Okinawa, Japan, September 22–24, 2023.

• Amy B. M. Tsui, Chao Wang, Jun-Jie Tseng & Mei-Lan Lo. 2023. Language Related Episodes (LRE) Revisited: The Case of EMI in Computer Engineering. The International EMI Forum Language Issues in English-Medium Instruction, National Taiwan Normal University, Taipei, Taiwan, April 22–23, 2023.

Invited Talk

• Chao Wang. 2023. In Search Of Meeting Conflicting Performance Demands: A Case From Real-Time Fault-Tolerant Data Communication. The 6th International Conference on Information Science and Systems (ICISS), Edinburgh, UK, August 11–13, 2023.

Dissertation / Thesis

PhD Dissertation

• 王超 Wang, Chao (2019). Real-Time Reliable Middleware for Industrial Internet-of-Things. Washington University in St. Louis. (link)

Master’s Thesis

• 陳韻帆 Chen, Yun-Fan (2024) 多路徑解的雙自由度陽光反射系統研究 Study on Dual-Degree Sunlight Reflection System with Multipath Solutions. National Taiwan Normal University.

• 陳昱瑋 Chen, Yu-Wei (2024) 整合車輛軌跡模擬與訊息交換的車聯網測試平台 An Internet-of-Vehicles Testbed for Integrating Trajectory Simulation and Real Message Exchange. National Taiwan Normal University.

• Gábor Szolnok (2024) Human-Aware Edge Computing Scheduling for Cyber-Physical Systems. National Taiwan Normal University.

• 何忠憲 He, Jhong-Sian (2024) 探索以聯網陽光反射系統輔助室內照明之研究 Towards IoT-Enhanced Indoor Illumination via Sunlight Reflectors Orchestration. National Taiwan Normal University.

• 張劭群 Zhang, Shao-Qun (2023) 應用於LoRaWAN的無電池週期性拍照設計 Battery-Less Periodic Imaging for LoRaWANs. National Taiwan Normal University.

• 曾翊瑄 Tseng, Yi-Hsuan (2023) 異質資料流應用的MQTT雲代理設計 Cloud MQTT Broker Design for Heterogeneous-Message-Flow Applications. National Taiwan Normal University.

• 李國豪 Li, Guo-Hao (2023) 智慧城市中基於網路流量的可重組態影像串流服務 Traffic-Aware Reconfigurable Video Streaming Scheme for Smart City Applications. National Taiwan Normal University.

• Tim Leon Wywiol (2023). Condition Monitoring Of Machine Components From Drive Data Using Semi-supervised Anomaly Detection Methods. National Taiwan Normal University.

• 周柏瑄 Chou, Po-Hsuan (2023). 非持久性載波之無電池背向散射通訊系統 Battery-Free Backscatter Communication Systems with Non-Persistent Carriers. National Taiwan Normal University.

• 李奕萱 Lee, Yih Shiuan (2023). 提供微電網應用研究的網宇實體系統驗證平台 A Cyber-Physical Testbed for Microgrid Applications. National Taiwan Normal University.

• 劉瀚文 Liu, Han-Wen (2023). 智慧城市中視野受阻轉角的合作式碰撞警告 Smart-City Collaborative Collision Warning for Blocked-View Corners. National Taiwan Normal University.

• 彭成聖 Peng, Cheng-Sheng (2022). ATP:用於無電池物聯網裝置的自適應傳輸策略 ATP: Adaptive Transmission Policy for Battery-Less IoT Devices. National Taiwan Normal University.

• 莊承勳 Chuang, Cheng-Hsun (2022). 提升智慧工廠情境中LoRaWAN網路能源效率與資料新鮮度 Enhancing LoRaWAN Network Energy Efficiency and Data Freshness in Smart Factories. National Taiwan Normal University.

• 鍾佳欽 Chung, Chia-Chin (2022). 基於後量子密碼學的物聯網資安強化技術 An IoT Security Enhancement using Post-Quantum Cryptography. National Taiwan Normal University.

• 余承恩 Yu, Cheng-En (2021). 適用於智慧校園之永續LoRaWAN物聯網架構 A Sustainable LoRaWAN IoT Ecosystem Architecture for Smart Campus. National Taiwan Normal University.

• 林政佑 Lin, Cheng-You (2021). 基於網宇實體系統整合的資料重用與工作替換 Cyber-Physical Systems Integration for Data Reuse and Tasks Replacements. National Taiwan Normal University.

• 梅志碩 Mei, Chih-Shuo (2021). 在人工智慧物聯網應用中探討能源效率和即時性使用在模型訓練上 Energy Efficiency and Timeliness in Model Training for AIoT Applications. National Taiwan Normal University.

• 鍾尚值 Chung, Shang Chih (2021). 應用於工業物聯網的即時節能端對端訊息傳輸架構 A Real-Time Energy-Efficient End-to-End Messaging Architecture for Industrial Internet-of-Things Applications. National Taiwan Normal University.

• 王超 Wang, Chao (2010). 在無線感測器網路中的低延遲鏈結排程機制 Low-Latency Link Scheduling in Wireless Sensor Networks. National Cheng Kung University. (link) (For the corrected version of the proofs in Chapter 5, see Yang, C-H., Ssu, K-F. and Wang, C. (2018) ‘Effects of vertex insertion on local rescheduling in wireless sensor networks’, Int. J. Ad Hoc and Ubiquitous Computing, Vol. 27, No. 3, pp.195–209.)