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연구자

1-9 out of 1549 results

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연구실

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저널논문

1-3 out of 134984 results

Bio-inspired design of pre-shaped SMA skeleton actuator for compact and tunable snapping INTERNATIONAL JOURNAL OF SMART AND NANO MATERIALS, v.17, no.1, 2026-12

Keywords soft robotics bio-inspired design bistability Shape memory alloys rapid actuation

Bio-inspired design of pre-shaped SMA skeleton actuator for compact and tunable snapping
Yang, Yang ; Roh, Jaewoo ; Zhang, Qian ; Ji, Wonhee ; Wang, Yongquan ; Oh, Il-Kwon

초록	Soft actuators that combine compactness, rapid response, and high output power are critical for advancing high-performance soft robotic systems. Although bistable architectures can amplify speed through elastic instability, their combination with functional materials often sacrifices compactness or lacks tunability. Here, we report a Venus flytrap-inspired shape memory alloy - embedded snapping actuator (SMA-ESA) that achieves compact and tunable actuation by structurally integrating pre-shaped SMA wires within a double-tilted elastomeric matrix. The SMA skeleton not only triggers snap-through via its thermal shape memory effect but also regulates performance. Combined experimental and finite element studies reveal that the actuation performance - characterized by energy storage capacity as well as the rate and efficiency of energy release - is tunable through both geometric parameters and input power. As a proof of concept, the SMA-ESA is demonstrated in a flytrap-inspired capture device that selectively responds to external stimuli. These results establish a generalizable strategy for embedding high-power-density materials into bistable soft structures, offering new opportunities for compact, responsive, and bio-inspired soft robotics.
서지사항	INTERNATIONAL JOURNAL OF SMART AND NANO MATERIALS, v.17, no.1, 2026-12
ISSN	1947-5411
주제분야	Materials Science
저자 키워드	soft robotics bio-inspired design bistability Shape memory alloys rapid actuation
DOI	10.1080/19475411.2026.2616101
자료유형	Article
기관	KAIST

Electro-optic frequency comb generation in lithium niobate photonic crystal Fabry–Pérot micro-resonator Npj Nanophotonics, v.3, no.1, 2026-12

Electro-optic frequency comb generation in lithium niobate photonic crystal Fabry–Pérot micro-resonator
Hwang, Hyeon ; Go, Seokjoo ; Kim, Guhwan ; Kim, Hong-Seok ; Moon, Kiwon ; Ju, Jung Jin ; Lee, Hansuek ; Seo, Min-Kyo

초록	Integrated electro-optic (EO) combs offer compelling advantages in stability and tunability, but their performance has been constrained by weak modulation efficiency, parasitic Raman scattering, and the difficulty of achieving broad bandwidth within a compact footprint. We demonstrate EO frequency comb generation in a dispersion-engineered photonic crystal Fabry–Pérot (PhC-FP) micro-resonator in thin-film lithium niobate. Hundreds of standing-wave resonant modes with quality factors exceeding 10⁶ are supported within a photonic bandgap, while Raman-scattering bands are excluded. Integrated dispersion, primarily shaped by PhC reflectors, includes the zero-dispersion point for phase-matched EO modulation. Consequently, Raman-free EO combs are achieved under high on-chip pump powers of up to 200 mW. Comb characteristics are reconfigurable via microwave power, frequency detuning, and pump wavelength. This platform offers a compact, chip-integrated solution that provides broadband generation, high-power operation, and reconfigurability for EO comb sources in nonlinear and quantum photonic systems.
서지사항	Npj Nanophotonics, v.3, no.1, 2026-12
ISSN	2948-216X
주제분야
저자 키워드
DOI	10.1038/s44310-026-00109-5
자료유형	Article
기관	KAIST

Enhancing mechanical performance of elastomeric vat-photopolymerized resins via functionalized cellulose nanocrystals VIRTUAL AND PHYSICAL PROTOTYPING, v.21, no.1, 2026-12

Keywords Cellulose nanocrystals 3D printing elastomer mechanical properties agglomerations

Enhancing mechanical performance of elastomeric vat-photopolymerized resins via functionalized cellulose nanocrystals
Lee, Wonhee ; Kim, Eui-Hyuk ; Kuehnel, Tim ; Min, Jinhong ; Lee, Jiho ; Kim, Hoon ; Yoon, Yong-Jin

초록	Vat photopolymerization (VP) additive manufacturing enables precise, reproducible fabrication of complex biomedical devices, yet elastomeric resins with robust mechanics remain scarce for constrained surgical settings. Cellulose nanocrystals (CNC) are appealing reinforcements owing to high strength, biodegradability and biocompatibility, but their hydrophilicity limits compatibility with hydrophobic resins and drives agglomeration at higher loadings. Acrylated CNC (ACNC) was synthesised to increase hydrophobicity and promote interfacial bonding. Elastic resins with varied CNC or ACNC loadings were 3D printed by VP and characterised by tensile testing, transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and rheology. Both fillers increased tensile strength, modulus, elongation and toughness relative to the neat resin, with the maximum improvement observed at 0.01 phr; ACNC consistently outperformed CNC. TEM showed relatively well-dispersed nanofillers at low concentration, whereas higher levels agglomerated and reduced reinforcement. FTIR and rheology indicated stronger covalent interactions and enhanced network formation in ACNC composites, yielding superior interfacial adhesion. Although interfacial bonding rose with filler level, agglomeration ultimately governed performance. These results demonstrate the feasibility of CNC-based nanofillers in VP elastomers and highlight ACNC as a sustainable route to high performance, patient-specific biomedical materials with clear practical relevance to constrained surgical environments.
서지사항	VIRTUAL AND PHYSICAL PROTOTYPING, v.21, no.1, 2026-12
ISSN	1745-2759
주제분야	Engineering Materials Science
저자 키워드	Cellulose nanocrystals 3D printing elastomer mechanical properties agglomerations
DOI	10.1080/17452759.2026.2662727
자료유형	Article
기관	KAIST

연구과제

1-3 out of 31710 results

그린 요소 생산으로 탄소 업사이클링을 위한 미세 구조 제어 촉매 개발 과학기술정보통신부, 박사과정생연구장려금지원, 김도훈, 2025-03 ~ 2025-08
Keywords Urea Electrochemistry Thermodynamic Eletrocatalyst Microenvironment

펨토초 순간 흡수 현미경을 활용한 양자점에서의 엑시톤 전달 원리 연구 교육부, 석사과정생연구장려금지원, 성주영, 2025-03 ~ 2025-08
Keywords Femtosecond transient absorption microscopy Quantum dots Charge carrier Spectroscopy

정신적 외상에 의한 치아이랑 단세포 이질성 변화와 스트레스 취약성에서 Lhfp 유전자의 병리적 역할 교육부, 석사과정생연구장려금지원, 2025-03 ~ 2025-08

특허

1-3 out of 24579 results

무인 항공기 감지를 위한 주파수 변조 연속파 레이더 시스템 망 FREQUENCY MODULATED CONTINUOUS WAVE CHAIN RADAR SYSTEM FOR DETECTING UNMANNED AERIAL VEHICLE, Registration Number: 10-2015-0078711, Registration Date: 2027-05-26, 대한민국

구형 파면 전파를 고려한 3차원 통신 센싱 통합 빔포머 설계 방법 및 그 시스템 3-DIMENTIONAL INTEGRATED COMMUNICATION AND SENSING BEAMFORMER DESIGN METHOD CONSIDERING SPHERICAL WAVEFRONT PROPAGATION AND SYSTEM THEREOF, Registration Number: 10-2971865-0000, Registration Date: 2026-05-27, 대한민국

구형 파면 전파를 고려한 3차원 통신 센싱 통합 빔포머 설계 방법 및 그 시스템

요약정보	구형 파면 전파를 고려한 3차원 통신 센싱 통합 빔포머 설계 방법 및 그 시스템이 개시된다. 통신 센싱 통합 빔포머 설계 방법은, ISAC(integrated sensing and communication) 시스템의 채널을 구형 파면(spherical wavefront)의 특성을 기초로 모델링하는 단계: 및 상기 ISAC 시스템의 채널 모델을 통해 사용자 단말(user equipment)의 수신 신호 SNR(signal-to-noise ratio)과 타겟 반사 신호의 파워를 기초로 통신 센싱 통합 빔포머(Integrated communication and sensing beamformer)를 설계하는 단계를 포함할 수 있다.	크게보기
타언어명	3-DIMENTIONAL INTEGRATED COMMUNICATION AND SENSING BEAMFORMER DESIGN METHOD CONSIDERING SPHERICAL WAVEFRONT PROPAGATION AND SYSTEM THEREOF
출원번호	10-2024-0093242
출원일자	2024-07-15
등록번호	10-2971865-0000
등록일자	2026-05-27
발명자	박현철, 황민영
출원/등록국가	대한민국
기관	KAIST

JOINT DESIGN OF USER ASSOCIATION AND HYBRID BEAMFORMING METHOD AND SYSTEM FOR SUB-THz UDN USING MULTI-AGENT DEEP REINFORCEMENT LEARNING 다수의 사용자를 위한 멀티 에이전트 심층 강화학습을 적용한 간섭 제어 및 하이브리드 빔포밍 방법 및 시스템, Registration Number: 12640792, Registration Date: 2026-05-26, 미국

JOINT DESIGN OF USER ASSOCIATION AND HYBRID BEAMFORMING METHOD AND SYSTEM FOR SUB-THz UDN USING MULTI-AGENT DEEP REINFORCEMENT LEARNING

요약정보	Disclosed is a method and system for interference control and hybrid beamforming using multi-agent deep reinforcement learning for multiple users. The disclosed method includes performing multi-agent reinforcement learning using interference and antenna gain information that is expected based on a gain table designed using channel state information (CSI) of all user equipments; searching for an analog beamforming matrix pair corresponding to a link that maximizes antenna gain and minimizes interference between user equipments through multi-agent reinforcement learning; applying a signal-to-leakage plus noise ratio (SLNR) maximization technique that minimizes the interference between the user equipments based on the link; and optimizing transmission (Tx) power for each link based on iterative water-filling.
타언어명	다수의 사용자를 위한 멀티 에이전트 심층 강화학습을 적용한 간섭 제어 및 하이브리드 빔포밍 방법 및 시스템
출원번호	18343546
출원일자	2023-06-28
등록번호	12640792
등록일자	2026-05-26
발명자	Park, Hyuncheol, Lee, Seunghun
출원/등록국가	미국
기관	KAIST

학술활동

1-3 out of 92429 results

Development of chemical probes for capturing protein arginine kinases 6th Asian Chemical Biology Conference 2023, 대한민국, 2230-82-01 ~ 2023-08-23

Development of chemical probes for capturing protein arginine kinases
Lee, Shin Hyeon ; Kee, Jung-Min

초록	Protein kinases play a critical role in controlling numerous cellular regulation pathways and signal transduction.1 Protein arginine phosphorylation, one of the relatively acid-labile N- phosphorylations, has been identified in numerous prokaryotic and eukaryotic proteins.2 The only known protein Arg kinase is McsB in Gram-positive bacteria, which was characterized in 2009.3 McsB is a heat-stress responsive kinase and phosphorylates Arg residues in aggregated cytosolic proteins so that phosphoarginine (pArg) acts as a protein degradation tag recognized by the ClpC/ClpP protease system. Recently, bacterial-PROTAC was developed using pArg and ClpC- binding cyclic peptide to induce the degradation of the target protein.4 In contrast, no eukaryotic or mycobacterial protein Arg kinase has been identified despite the abundance of pArg sites in those organisms, hindering further studies of Arg phosphorylation. Herein, we report our progress in developing mechanism-based chemical probes to label and capture the elusive Arg kinase.
학술대회명	6th Asian Chemical Biology Conference 2023
개최국	대한민국
개최장소
개최일	2023-08-22
저자 키워드
DOI
기관	UNIST

Domain Knowledge-Informed Functional Outlier Detection for Line Quality Control Systems 한국경영과학회-대한산업공학회 2022 춘계공동학술대회, 대한민국, 2206-01 ~ 2206-04

Domain Knowledge-Informed Functional Outlier Detection for Line Quality Control Systems
Mun, Jonghwan ; Yoon, Kwonin ; Kim, Gyeongjun ; Yoo, Jitae ; Kim, Heesun ; Ryu, Nayi ; Kim, Sungil

초록
학술대회명	한국경영과학회-대한산업공학회 2022 춘계공동학술대회
개최국	대한민국
개최장소
개최일	2022-06-03
저자 키워드
DOI
기관	UNIST

광 네트워크를 통한 실시간 미디어 전송을 위한 멀티캐스트 라우팅 기법에 관한 연구 SWCC2008, 대한민국, ? ~ ?

연구장비

1-3 out of 3561 results