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Lee, J. (author), Mitici, M.A. (author), Blom, H.A.P. (author), Bieber, Pierre (author), Freeman, Floris (author)The increasing use of on-board sensor monitoring and data-driven algorithms has stimulated the recent shift to data-driven predictive maintenance for aircraft. This paper discusses emerging challenges for data-driven predictive aircraft maintenance. We identify new hazards associated with the introduction of data-driven technologies into...journal article 2023
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Tabone, W. (author), Happee, R. (author), García, Jorge (author), Lee, Yee Mun (author), Lupetti, M.L. (author), Merat, Natasha (author), de Winter, J.C.F. (author)Augmented Reality (AR) technology could be utilised to assist pedestrians in navigating safely through traffic. However, whether potential users would understand and use such AR solutions is currently unknown. Nine novel AR interfaces for pedestrian-vehicle communication, previously developed using an experience-based design method, were...journal article 2023
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Shin, D. (author), Kim, Hakseong (author), Kim, S.H. (author), Cheong, Hyeonsik (author), Steeneken, P.G. (author), Joo, C. (author), Lee, Sang Wook (author)The inherent properties of 2D materials—light mass, high out-of-plane flexibility, and large surface area—promise great potential for precise and accurate nanomechanical mass sensing, but their application is often hampered by surface contamination. Here we demonstrate a tri-layer graphene nanomechanical resonant mass sensor with sub-attogram...journal article 2023
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Park, S.Y. (author), Newton, C.E.L. (author), Lee, Rachel (author)The sudden adoption of working from home (WFH) during the COVID-19 pandemic has required the reconfiguration of home spaces to fit space for remote work into existing spaces already filled with other domestic functions. This resulted in blurring of home and work boundaries, the potential lack of space for telecommuting from home, and...journal article 2023
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Lee, Y.C. (author), Brühl, M. (author), Wahls, S. (author)When a large number of solitons dominates the dynamics of a system, scientists describe this collective behaviour of solitons as a soliton gas. Soliton gases are currently the subject of intense practical and theoretical investigations. The existence of soliton gases has been confirmed in experiments, but is not clear what kind of sea states...conference paper 2023
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Ellis, Michael D. (author), Gurari, Netta (author), Gerritsen, Ninette T.A. (author), Lee, Sabrina M. (author), Wang, Amy (author), Dewald, J.P.A. (author)Muscle tissue is prone to changes in composition and architecture following stroke. Changes in muscle tissue of the extremities are thought to increase resistance to muscle elongation or joint torque under passive conditions. These effects likely compound neuromuscular impairments, exacerbating movement function. Unfortunately, conventional...journal article 2023
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Jang, Tae Jin (author), Lee, You Na (author), Ikeda, Yuji (author), Körmann, F.H.W. (author), Baek, Ju Hyun (author), Do, Hyeon Seok (author), Choi, Yeon Taek (author), Gwon, Hojun (author), Suh, Jin Yoo (author), Kim, Hyoung Seop (author), Lee, Byeong Joo (author), Zargaran, Alireza (author), Sohn, Seok Su (author)Complex concentrated alloys (CCAs) with a face-centered-cubic (FCC) structure exhibit remarkable mechanical properties, introducing the expansion of compositional space in alloy design for structural materials. The formation of a single solid-solution phase is enabled by configuring various 3d-transition elements, while doping other elements...journal article 2023
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Lee, Y. (author), Limbu, B.H. (author), Rusak, Z. (author), Specht, M.M. (author)Technology-enhanced learning systems, specifically multimodal learning technologies, use sensors to collect data from multiple modalities to provide personalized learning support beyond traditional learning settings. However, many studies surrounding such multimodal learning systems mostly focus on technical aspects concerning data collection...conference paper 2023
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Lee, Y. (author), Specht, M.M. (author)Reading on digital devices has become more commonplace, while it often poses challenges to learners' attention. In this study, we hypothesized that allowing learners to reflect on their reading phases with an empathic social robot companion might enhance learners' attention in e-reading. To verify our assumption, we collected a novel dataset ...conference paper 2023
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Liang, Hongping (author), Guo, Xin (author), Guo, Lanpeng (author), Liu, Siying (author), Zhan, Qiuqiang (author), Yang, Haihong (author), Li, Hao (author), de Rooij, Nicolaas Frans (author), Lee, Yi Kuen (author), French, P.J. (author), Wang, Yao (author), Zhou, Guofu (author)Constructing near-infrared light (NIR) light-enhanced room temperature gas sensors is becoming more promising for practical application. In this study, learning from the structure and photosynthetic process of chlorophyll thylakoid membranes in plants, the first “Thylakoid membrane” structural formaldehyde (HCHO) sensor is constructed by...journal article 2023
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Lee, J. (author)Current aircraft maintenance ensures safe and reliable flight operations based on inspections repeated at fixed time intervals. The time interval between inspections is often much shorter than the average life of aircraft components, in an effort to timely detect potential failures. While this approach successfully prevents most potential...doctoral thesis 2022
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Wang, Zhongkai (author), Choi, Minsoo (author), Lee, Kyoungtae (author), Park, Kwanseo (author), Liu, Zhaokai (author), Biswas, Ayan (author), Han, Jaeduk (author), Du, S. (author), Alon, Elad (author)This article presents a 200-Gb/s pulse amplitude-modulation four-level (PAM-4) and 100-Gb/s non-return-to-zero (NRZ) transmitter (TX) in 28-nm CMOS technology. To achieve the target data rate, the output bandwidth and swing of the proposed TX are optimized by minimizing the output capacitance of the 4:1 multiplexer (MUX) and driver stage with...journal article 2022
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Wang, Zhongkai (author), Choi, Minsoo (author), Kwon, Paul (author), Lee, Kyoungtae (author), Yin, Bozhi (author), Liu, Zhaokai (author), Park, Kwanseo (author), Biswas, Ayan (author), Du, S. (author)This paper presents a complete 200Gb/s PAM-4 transmitter (TX) in 28nm CMOS technology. The transmitter features a hybrid sub-sampling PLL (SSPLL) with a delta-sigma (?S) modulator, clock distribution network with flexible timing control, and data path with a hybrid 5-tap Feed-Forward Equalizer (FFE) and T-coil for bandwidth extension. The...conference paper 2022
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Lee, J. (author), Mitici, M.A. (author), Geng, S. (author), Yang, M. (author)When designing the maintenance of multi-component aircraft systems, we consider parameters such as safety margins (used when component replacements are scheduled), and reliability thresholds (used to define data-driven Remaining-Useful-Life prognostics of components). We propose Gaussian process learning and novel adaptive sampling techniques to...conference paper 2022
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Lee, J. (author), Mitici, M.A. (author)The increasing availability of sensor monitoring data has stimulated the development of Remaining-Useful-Life (RUL) prognostics and maintenance planning models. However, existing studies focus either on RUL prognostics only, or propose maintenance planning based on simple assumptions about degradation trends. We propose a framework to integrate...journal article 2022
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Lee, J. (author), de Pater, I.I. (author), Boekweit, S.A. (author), Mitici, M.A. (author)Several studies have proposed Remaining-Useful-Life (RUL) prognostics for aircraft components in the last years. However, few studies focus on integrating these RUL prognostics into maintenance planning frameworks. This paper proposes an optimization model for opportunistic maintenance scheduling of aircraft components that integrates RUL...conference paper 2022
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Lee, J. (author), Theuwissen, A.J.P.A.M. (author)A column-parallel 10-bit SAR ADC for high-speed image sensors has been implemented. A fast offset calibration technique using memory is proposed to compensate for the offset mismatch, accompanied by an ADC designed for a narrow space the size of a single column pitch. The memory accumulates the variation of the offset to track the offset...journal article 2022
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Tabone, W. (author), Happee, R. (author), García De Pedro, Jorge (author), Lee, Yee Mun (author), Lupetti, M.L. (author), Merat, Natasha (author), de Winter, J.C.F. (author)Nine AR interfaces designed using an experience- based, and theoretically informed design approach, were presented in an online questionnaire for user evaluation.<br/>Statistical analysis of presented measures, and the computation of an overall composite score revealed a preference towards traditional and familiar traffic elements.poster 2022
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- Lee, Rachel (author), Iyer Siddiqi, Anooradha (author) journal article 2022
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Garming, M.W.H. (author), Weppelman, I.G.C. (author), Lee, M. (author), Stavenga, T. (author), Hoogenboom, J.P. (author)Ultrafast scanning electron microscopy images carrier dynamics and carrier induced surface voltages using a laser pump electron probe scheme, potentially surpassing all-optical techniques in probe resolution and surface sensitivity. Current implementations have left a four order of magnitude gap between optical pump and electron probe...journal article 2022