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| 1 | Hybridisation of perovskite nanocrystals with organic molecules for highly efficient liquid scintillators显示文摘Compared with solid scintillators,liquid scintillators have limited capability in dosimetry and radiography due to their relatively low light yields.Here,we report a new generation of highly efficient and low-cost liquid scintillators constructed by surface hybridisation of colloidal metal halide perovskite CsPbA_(3)(A:Cl,Br,I)nanocrystals(NCs)with organic molecules(2,5-diphenyloxazole).The hybrid liquid scintillators,compared to state-of-the-art CsI and Gd_(2)O_(2)S,demonstrate markedly highly competitive radioluminescence quantum yields under X-ray irradiation typically employed in diagnosis and treatment.Experimental and theoretical analyses suggest that the enhanced quantum yield is associated with X-ray photon-induced charge transfer from the organic molecules to the NCs.High-resolution X-ray imaging is demonstrated using a hybrid CsPbBr_(3) NC-based liquid scintillator.The novel X-ray scintillation mechanism in our hybrid scintillators could be extended to enhance the quantum yield of various types of scintillators,enabling low-dose radiation detection in various fields,including fundamental science and imaging. | Sangeun Cho Sungwoo Kim Jongmin Kim Yongcheol Jo Ilhwan Ryu Seongsu Hong Jae-Joon Lee SeungNam Cha Eun BiNam Sang Uck Lee Sam Kyu Noh Hyungsang Kim Jungwon Kwak Hyunsik Im | 2020 | Light(Science & Applications)2020，9，1： | 4 |
| 2 | Non-destructive thickness characterisation of 3D multilayer semiconductor devices using optical spectral measurements and machine learning显示文摘Three-dimensional(3D)semiconductor devices can address the limitations of traditional two-dimensional(2D)devices by expanding the integration space in the vertical direction.A 3D NOT-AND(NAND)flash memory device is presently the most commercially successful 3D semiconductor device.It vertically stacks more than 100 semiconductor material layers to provide more storage capacity and better energy efficiency than 2D NAND flash memory devices.In the manufacturing of 3D NAND,accurate characterisation of layer-by-layer thickness is critical to prevent the production of defective devices due to non-uniformly deposited layers.To date,electron microscopes have been used in production facilities to characterise multilayer semiconductor devices by imaging cross-sections of samples.However,this approach is not suitable for total inspection because of the wafer-cutting procedure.Here,we propose a non-destructive method for thickness characterisation of multilayer semiconductor devices using optical spectral measurements and machine learning.For>200-layer oxide/nitride multilayer stacks,we show that each layer thickness can be non-destructively determined with an average of approximately 1.6Åroot-mean-square error.We also develop outlier detection models that can correctly classify normal and outlier devices.This is an important step towards the total inspection of ultra-high-density 3D NAND flash memory devices.It is expected to have a significant impact on the manufacturing of various multilayer and 3D devices. | Hyunsoo Kwak Sungyoon Ryu Suil Cho Junmo Kim Yusin Yang Jungwon Kim | 2021 | Light(Advanced Manufacturing)2021，2，1： | 4 |
| 3 | Effects of Gastrodiae rhizoma on proliferation and differentiation of human embryonic neural stem cells显示文摘Objective:To investigate the effects of Gastrodiae rhizoma,a dried root of Gastrodia elata Blume,on proliferation and differentiation of human NSCs derived from embryonic stem cells.Methods:A 70%ethanol extract of Gastrodiae rhizoma(EEGR) was estimated with4-hydroxybenzyl alcohol as a representative constituent by HPLC.Results:MTT assay showed that the treatment with EEGR increased the viability of NSCs in growth media.Compared to contro1,EEGR increased the number of dendrites and denritic spines extended from a differentiated NSC.Whereas EEGR decreased the mRNA expression of Nestin,it increased that of Tuj1 and MAP2 in NSCs grown in differentiation media.Immunocytochemical analysis using confocal microscopy also revealed the increased expression of MAP2 in dendrites of EEGR-treated NSCs.Furthermore,EEGR decreased mRNA expression of Sox2 in NSCs grown even in growth media.Conclusions:In conclusion,our study demonstrates for the first time that EEGR induced proliferation and neuronal differentiation of NSCs,suggesting its potential benefits on NSC-based therapies and neuroregeneration in various neurodegenerative diseases and brain Injuries. | Samrat Baral Ramesh Pariyar Chi-Su Yoon Dong-Cheol Kim Jong-Min Yun Seok O Jang Sung Yeon Kim Hyuncheol Oh Youn-Chul Kim Jungwon Seo | 2015 | Asian Pacific Journal of Tropical Medicine2015，8，10： | 2 |
| 4 | All-fiber-photonics-based ultralow-noise agile frequency synthesizer for X-band radars显示文摘We propose and demonstrate an agile X-band signal synthesizer with ultralow phase noise based on all-fiberphotonic techniques for radar applications. It shows phase noise of-145 dBc∕Hz(-152 dBc∕Hz) at 10 kHz(100 kHz) offset frequency for 10 GHz carrier frequency with integrated RMS timing jitter between 7.6 and 9.1 fs(integration bandwidth: 10 Hz–10 MHz) for frequencies from 9 to 11 GHz. Its frequency switching time is evaluated to be 135 ns with a 135 pHz frequency tuning resolution. In addition, the X-band linearfrequency-modulated signal generated by the proposed synthesizer shows a good pulse compression ratio approximating the theoretical value. In addition to the ultrastable X-band signals, the proposed synthesizer can also provide 0–1 GHz ultralow-jitter clocks for analog-to-digital converters(ADC) and digital-to-analog converters(DAC) in radar systems and ultralow-jitter optical pulse trains for photonic ADC in photonic radar systems.The proposed X-band synthesizer shows great performance in phase stability, switching speed, and modulation capability with robustness and potential low cost, which is enabled by an all-fiber-photonics platform and can be a compelling technology suitable for future X-band radars. | JUAN WEI DOHYEON KWON SHUANGYOU ZHANG SHILONG PAN AND JUNGWON KIM | 2018 | Photonics Research2018，9，1： | 2 |
| 5 | Epidural chloroma and spinal cord compression显示文摘To the Editor:Chloroma is a rare solid tumor that was formed sometimes from malignant myeloid blast cells outside the hematopoietic system;these are known as chloroma or granulocytic sarcoma[1]Chloroma can be diagnosed anywhere outside of the hematopoietic system,such as the head and neck,skeletal system,breast,uterus,and central nervous system.[2]This tumor is common in leukemic patients.[3]Chloroma presents as an epidural mass resulting in spinal cord compression with neurologic symptoms.[4]Spinal lesions occur most frequently at the thoracic level;however,the most common primary symptoms are low back pain and radiating pain in the legs[5]. | Hyun Jung Koh Jungwon Baek Min Soo Lee Hue Jung Park | 2019 | Chinese Medical Journal2019，，7： | 2 |
| 6 | Analysis of rotavirus genotypes in Korea during 2013: An increase in the G2P[4] genotype after the introduction of rotavirus vaccines显示文摘 | Jae-Seok Kim Hyun Soo Kim Jungwon Hyun Han-Sung Kim Wonkeun Song Kyu Man Lee Seon-Hee Shin | 2014 | Vaccine2014，，： | 1 |
| 7 | Development of f- axis force/moment sensor for a humanoid robot' s intelligent foot显示文摘 | Kim Gab-Soon Shin Hi-Jun Yoon Jungwon | 2008 | Sensors and Actuators A: Physical2008，141，： | 1 |
| 8 | Bentley:immune memory and gene library evolution in the dynamic clonal selection algorithm显示文摘 | Jungwon Kim Peter J | 2004 | Journal of Genetic Programming and Evolvable Machines2004，5，4： | 1 |
| 9 | TiO2 modified with both phosphate and platinum and its photocatalytic activities 显示文摘 | Kim Jungwon Choi Wonyong | 2011 | Applied Catalysis B : Environmental2011，106，12： | 1 |
| 10 | Multiuser bit loading for multicarrier systems显示文摘 | JUNGWON L RANJAN V S JOHN M C | 2006 | IEEE Transa Commun2006，54，7： | 1 |
| 11 | Inclusion complexes of modified cyclodextrins with some flavonols显示文摘 | HYUNMYUNG K JUNGWON C SEUNHO J | 2009 | J Incl Phenom Macrocycl Chem2009，64，： | 1 |
| 12 | Assembly Simulations in Virtual Envi- ronments with Optimized Haptic Path and Sequence 显示文摘 | Christiand Yoon Jungwon | 2011 | Robotics and Computer-Integrated Manufacturing2011，27，2： | 1 |
| 13 | Towards an Artificial Immune System for Network Intrusion Detection: An Investigation of Clonal Selection with a Negative Selection Operator显示文摘 | Jungwon Kim Peter J Bentley | 2001 | IEEE2001，2，5： | 1 |
| 14 | Blind Adaptive I/Q Imbalance Compensation Algorithms for Direct-Conversion Receivers显示文摘 | WOOSEOK N HEEJIN R JUNGWON L | 2012 | Signal Processing Letters IEEE2012，19，8： | 1 |
| 15 | A novel droop method for converter parallel operation显示文摘 | JUNGWON KIM HANG-SEOK CHOI BO HYUNG CHO | 2002 | IEEE Transactions on Power Electronics2002，17，1： | 1 |
| 16 | Payout policy and cash-flow uncertainty显示文摘 | J.B Chay Jungwon Su | | 0，，93： | 1 |
| 17 | Development of 6 -axis force/moment sensor for a humanoid robot's intelligent foot 显示文摘 | Gab-Soon Kim Hi-Jun Shin Jungwon Yoon | 2008 | Sensors and Actuators A: Physical2008，141，2： | 1 |
| 18 | Immune Memory and Gene Library Evolution in the Dynamic Clonai Selec- tion Algorithm 显示文摘 | Jungwon Kim Peter Bentley | 2004 | Genetic Programming and Evolvable Machines2004，，5： | 1 |
| 19 | Immune system approaches to detection--a review intrusion 显示文摘 | Kim Jungwon Bentley P Aickelin Uwe | 2007 | Natural Computing2007，6，4： | 1 |
| 20 | Fatigue Crack Growth Behavior of Surface Crack in Rails 显示文摘 | JUNGWON S SEOKJIN K | 2010 | Procedia Engineering2010，2，： | 1 |
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