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Designing high performance MXene supercapacitors through functionalization and defect engineering: A theoretical study
Supercapacitors (SCs) have attracted significant attention as energy storage devices due to their large power efficiency, excellent stability, prolonged cycle life and short recharge time. Ti-based MXenes have attracted considerable attention as promising candidates for SC electrodes due to their extraordinary physicochemical properties, such as high charge storage capacity, excellent electrical conductivity, unique layered structure, and the presence of multiple surface functional groups. In th
2026-06
Graded prefrontal–sensory connectivity underlies cross-modal hierarchical control
Does the rostro–caudal architecture of the prefrontal cortex (PFC) generalize to support hierarchical control across sensory modalities? To address this question, we used functional magnetic resonance imaging while participants performed three cue-based tasks integrating auditory and visual modalities, requiring policy abstraction from auditory cues to motor responses, visual features, or visual dimensions. Behaviorally, increasing abstraction and complexity produced robust costs in accuracy and
2026-07
Nd-Fe-B 소결자석의 입계확산 효율 향상을 위한 분말 기반 확산원 스탬프 코팅 공정
본 연구에서는 Nd-Fe-B 소결자석의 입계확산공정(GBD)에서 자기특성 향상과 공정 단순화를 위해 분말형 TbHx 확산원을 이용한 스탬프 코팅 공정을 적용하였다. 기존 슬러리 기반 딥 코팅 공정과 비교하여, 스탬프 코팅은 동일한 확산원 사용량(1 wt.%) 조건에서 더 높은 보자력 향상을 나타냈다. 특히 스탬프 코팅 GBD 자석은 22.02 kOe의 Hcj를 나타내어 딥 코팅 GBD 자석보다 우수한 보자력 특성을 보였다. 또한, 스탬프 코팅 GBD 자석은 다른 자석들에 비해서 열 안정성이 향상되었다. Tb의 확산은 자석 표면으로부터 내부 방향으로 확산되었으며, 자석 표면 영역에서는 입계 및 결정립 표면을 따라 Tb-rich shell을 형성하였다. 이러한 결과는 분말 기반 스탬프 코팅 공정이 확산원 손실을 줄이면서 Nd-Fe-B 소결자석의 보자력 및 열 안정성을 향상시킬 수 있는 효과적인 GBD 공정임을 보여준다.
2026-06
Biomimetic artificial olfactory systems based on metal-organic frameworks: from material design to intelligent pattern recognition
Artificial olfactory systems (AOS) capable of mimicking biological olfaction are emerging as powerful tools for complex gas analysis. However, conventional sensing materials often face limitations regarding selectivity, response speed, and high operating temperatures. Metal-organic frameworks (MOFs) offer an ideal solution to these challenges due to their ultra-high porosity and tunable chemical functionality. This review presents a comprehensive overview of strategies to implement high-performa
2027-01
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Edge-Server Workload Characterization in Vehicular Computation Offloading: Semantics and Empirical Analysis
Edge server-assisted computation offloading enables vehicles to leverage server compute resources to deliver connected services, overcoming the limitations of onboard resources. Understanding the compute workloads of edge servers is crucial for effective resource management and scheduling, yet this task is challenging due to the complex interplay of factors such as vehicle mobility and computation offloading patterns. To address this, we propose an empirical analysis framework that systematicall
2024-06
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Recent Advances in Ultra-High-Speed Wireline Receivers with ADC-DSP-Based Equalizers
High-speed wireline data transceivers (TRX) with analog-to-digital converter (ADC) followed by digital signal processor (DSP) on the receiver (RX) equalizer became popular for applications requiring >100 Gb/s per-lane data rate over long-reach (LR) channels, especially for datacenter applications. With the digital-to-analog converter (DAC)-based transmitter (TX) including DSP-based TX signal processing, the overall structure of DAC/ADC-DSP-based wireline TRXs became similar to modulator/demodula
2024-11
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Multiple Sampling Capsule Robot for Studying Gut Microbiome
Longitudinal analysis of the gut microbiota is crucial for understanding its relationship with gastrointestinal (GI) diseases and advancing diagnostics and treatments. Most ingestible sampling devices move passively within the GI tract, rely on physiological factors, and fail at multipoint sampling. This study proposes a multiple-sampling capsule robot capable of collecting gut microbiota from various locations within the GI tract with minimal cross-contamination. The proposed capsule comprises
2025-11
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Empirical Analysis of MAVLink Protocol Vulnerability for Attacking Unmanned Aerial Vehicles
Recently, unmanned aerial vehicles (UAVs), or the so-called drones, have been used in various applications. In particular, UAVs are used for rescue systems, disaster detection, and military purposes, as well as for leisure and commercial purposes. UAVs that are controlled over networks by ground control stations (GCS) can provide various services with expanded activity area. It is thus of critical importance to investigate the vulnerability of the drone system. In this paper, we focus on UAVs co
2018-08
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