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Dipolar spin relaxation of divacancy qubits in silicon carbide

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npj Computational Materials 2021年第1期7卷 1974-1984页

作者： Oscar Bulancea-Lindvall Nguyen T.son Igor A.Abrikosov Viktor Ivády Department of Physics Chemistry and BiologyLinköping UniversitySE-58183 LinköpingSweden Wigner Research Centre for Physics Hungarian Academy of SciencesPO Box 49H-1525 BudapestHungary Max-Planck-Institut für Physik komplexer Systeme Nöthnitzer Straße 38D-01187 DresdenGermany

Divacancy spins implement qubits with outstanding characteristics and capabilities in an industrial semiconductor host On the other hand,there are still numerous open questions about the physics of these important defects,for instance,spin relaxation has not been thoroughly studied ***,we carry out a theoretical study on environmental spin-induced spin relaxation processes of divacancy qubits in the 4H polytype of silicon carbide(4H-SiC).We reveal all the relevant magnetic field values where the longitudinal spin relaxation time T,drops resonantly due to the coupling to either nuclear spins or electron *** quantitatively analyze the dependence of the T,time on the concentration of point defect spins and the applied magnetic field and provide ananalytical *** demonstrate that dipolar spin relaxation plays a significant role both in as-grown and ion-implanted samples and it often limits the coherence time of divacancy qubits in 4H-SiC.

关键词： relaxation vacancy resonant

Thermally Drawn Multi‑material Fibers Based on Polymer Nanocomposite for Continuous Temperature Sensing

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Advanced Fiber Materials 2023年第5期5卷 1712-1724页

作者： Woo Mi Ryu Yunheum Lee Yeonzu son Geonho Park Seongjun Park Department of Bio and Brain Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141South Korea Program of Brain and Cognitive Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141South Korea Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141South Korea KAIST Institute for NanoCentury Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141South Korea KAIST Institute for Health Science and Technology Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141South Korea

With increasing personalized healthcare,fiber-based wearable temperature sensors that can be incorporated into textiles have attracted more attention in the field of wearable ***,we present a flexible,well-passivated,polymer–nanocomposite–based fiber temperature sensor fabricated by a thermal drawing process of multiple *** engineered a preform to optimize material processability and sensor performance by considering the rheological and functional properties of the preform *** fiber temperature sensor consisted of a temperature-sensing core made from a conductive polymer composite of thermoplastic polylactic acid,a conductive carbon filler,reduced graphene oxide,and a highly flexible linear low-density polyethylene passivation *** fiber temperature sensor exhibited adequate sensitivity(−0.285%/℃)within a temperature range of 25–45℃with rapid response and recovery times of 11.6 and 14.8 s,*** addition,it demonstrated a consistent and reliable temperature response under repeated mechanical and chemical stresses,which satisfied the requirements for the long-term application of wearable fiber ***,the fiber temperature sensor sewn onto a daily cloth and hand glove exhibited a highly stable performance in response to body temperature changes and temperature detection by *** results indicate the great potential of this sensor for applications in wearable,electronic skin,and other biomedical devices.

关键词： Fiber temperature sensor Wearable device Thermal drawing process Multi-material thermal drawing conductive polymer composite

Structural identification of active moiety in anti-tumor metastatic polysaccharide purified from fermented barley by sequential enzymatic hydrolysis

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Food Bioscience 2022年第6期50卷 139-149页

作者： Seung-U son Han Wool Kim Kwang-Soon Shin Department of Food Science and Biotechnology Kyonggi UniversitySuwon16227Republic of Korea Transdisciplinary Major in Learning Health System Department of Integrated Biomedical and Life ScienceKorea UniversitySeoul02841Republic of Korea

The potent anti-cancer metastatic effects induced by the immunostimulatory activities of intravenously administered BF–I,an active polysaccharide purified from fermented barley,were previously *** study aimed to evaluate the anti-cancer metastatic effect of orally administered BF–I and elucidated the microstructure and active moiety of BF–I using sequential enzymatic *** experiments using Colon26-M3.1 carcinoma,prophylactic oral administration of BF–I potently suppressed lung cancer ***,gas chromatography-mass spectrometry analysis of partially methylated alditol acetate showed that BF–I comprised 15 different glycosyl linkages,including 4-linked Xylp(16.1%),terminal Araf(12.4%),4-linked Glcp(32.8%),3-linked Glcp(13.5%),3,6-linked Glcp(1.5%),and 3,6-linked Galp(5.3%).These glycosyl linkage combinations are typical for arabinoxylan,yeast-derivedβ-glucan,barley-derivedβ-glucan,and type II *** clarify the microstructure,BF–I was sequentially degraded via linkage-specific enzymatic hydrolysis using five ***,the sugar composition,glycosyl linkage,and reactivity with theβ-glucosyl Yariv reagent were analyzed,along with sequencing based on tandem mass spectra of partially degraded fragment *** results confirmed that BF–I comprises a mixture of four different types of polysaccharides(arabinoxylan,yeast-derivedβ-glucan,barley-derivedβ-glucan,and type II arabinogalactan)with similar molecular ***,different polysaccharides contribute significantly to cytokine(interleukin-6,-12,and tumor necrosis factor-α)secretion by peritoneal ***,the potent anti-cancer metastatic activity of BF–I is proposed to be related to the immunostimulatory activities of the four different types of polysaccharides.

关键词： Barley Polysaccharide structure Anti-cancer Enzymatic hydrolysis

Effect of Doubling the Ensemble Size on the Performance of Ensemble Prediction in the Warm Season Using MOGREPS Implemented at the KMA

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Advances in Atmospheric Sciences 2013年第5期30卷 1287-1302页

作者： Jun Kyung KAY Hyun Mee KIM Young-Youn PARK Joohyung son Department of Atmospheric Sciences Yonsei University Korea Meteorological Administration

Using the Met Office Global and Regional Ensemble Prediction System （MOGREPS） implemented at the Korea Meteorological Administration （KMA）, the effect of doubling the ensemble size on the performance of ensemble prediction in the warm season was evaluated. Because a finite ensemble size causes sampling error in the full forecast probability distribution function （PDF）, ensemble size is closely related to the efficiency of the ensemble prediction system. Prediction capability according to doubling the ensemble size was evaluated by increasing the number of ensembles from 24 to 48 in MOGREPS implemented at the KMA. The initial analysis perturbations generated by the Ensemble Transform Kalman Filter （ETKF） were integrated for 10 days from 22 May to 23 June 2009. Several statistical verification scores were used to measure the accuracy, reliability, and resolution of ensemble probabilistic forecasts for 24 and 48 ensemble member forecasts. Even though the results were not significant, the accuracy of ensemble prediction improved slightly as ensemble size increased, especially for longer forecast times in the Northern Hemisphere. While increasing the number of ensemble members resulted in a slight improvement in resolution as forecast time increased, inconsistent results were obtained for the scores assessing the reliability of ensemble prediction. The overall performance of ensemble prediction in terms of accuracy, resolution, and reliability increased slightly with ensemble size, especially for longer forecast times.

关键词： ensemble prediction ensemble size ensemble transform Kalman filter

Effect of equal-channel angular pressing on pitting corrosion resistance of anodized aluminum-copper alloy

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中国有色金属学会会刊：英文版 2009年第4期19卷 904-908页

作者： In-Joon son Hiroaki NAKANO Satoshi OUE Shigeo KOBAYASHI Hisaaki FUKUSHIMA Zenji HORITA Department of Materials Process Engineering Graduate School of EngineeringKyushu University Department of Materials Science and Engineering Faculty of EngineeringKyushu University Department of Applied Chemistry and Biochemistry Faculty of EngineeringKyushu Sangyo University

The effect of equal-channel angular pressing(ECAP) on the pitting corrosion resistance of anodized Al-Cu alloy was investigated by electrochemical techniques in a solution containing 0.2 mol/L AlCl3 and also by surface *** was conducted for 20 min at 200 and 400 A/m2 in a solution containing 1.53 mol/L H2SO4 and 0.018 5 mol/L Al2(SO4)3·16H2O at 20 ℃.Anodized Al-Cu alloy was immediately dipped in boiling water for 20 min to seal the micro pores present in anodic oxide *** time required before initiating pitting corrosion of anodized Al-Cu alloy is longer with ECAP than without,indicating that ECAP process improves the pitting corrosion resistance of anodized Al-Cu *** phase precipitates such as Si,Al-Cu-Mg and Al-Cu-Si-Fe-Mn intermetallic compounds are present in Al-Cu alloy and the size of these precipitates is greatly decreased by application of ***-Cu-Mg intermetallic compounds are dissolved during anodization,whereas the precipitates composed of Si and Al-Cu-Si-Fe-Mn remain in anodic oxide films due to their more noble corrosion potential than ***-SEM and EPMA observation reveal that the pitting corrosion of anodized Al-Cu alloy occurs preferentially around Al-Cu-Si-Fe-Mn intermetallic compounds,since the anodic oxide films are absent at the boundary between the normal oxide films and these impurity *** improvement of pitting corrosion resistance of anodized Al-Cu alloy processed by ECAP appears to be attributed to a decrease in the size of precipitates,which act as origins of pitting corrosion.

关键词：铝铜合金抗点蚀挤压转角通道

Corticoreticular tract lesion in children with developmental delay presenting with gait dysfunction and trunk instability

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Neural Regeneration Research 2017年第9期12卷 1465-1471页

作者： Yong Min Kwon Jessica Rose Ae Ryoung Kim Su Min son Department of Physical Medicine and Rehabilitation College of Medicine Yeungnam University Department of Orthopedic Surgery College of Medicine Stanford University

The corticoreticular tract （CRT） is known to be involved in walking and postural control. Using diffusion tensor tractography （DTT）, we investigated the relationship between the CRT and gait dysfunction, includ- ing trunk instability, in pediatric patients. Thirty patients with delayed development and 15 age-matched, typically-developed （TD） children were recruited. Fifteen patients with gait dysfunction （bilateral trunk instability） were included in the group A, and the other 15 patients with gait dysfunction （unilateral trunk instability） were included in the group B. The Growth Motor Function Classification System, Functional Ambulation Category scale, and Functional Ambulation Category scale were used for measurement of functional state. Fractional anisotropy, apparent diffusion coefficient, fiber number, and tract integrity of the CRT and corticospinal tract were measured. Diffusion parameters or integrity of corticospinal tract were not significantly different in the three study groups. However, CRT results revealed that both CRTs were disrupted in the group A, whereas CRT disruption in the hemispheres contralateral to clinical mani- festations was observed in the group B. Fractional anisotropy values and fiber numbers in both CRTs were decreased in the group A than in the group TD. The extents of decreases of fractional anisotropy values and fiber numbers on the ipsilateral side relative to those on the contralateral side were greater in the group B than in the group TD. Functional evaluation data and clinical manifestations were found to show strong correlations with CRT status, rather than with corticospinal tract status. These findings suggest that CRT status appears to be clinically important for gait function and trunk stability in pediatric patients and DTT can help assess CRT status in pediatric patients with gait dysfunction.

关键词： nerve regeneration corticoreticular tract corticospinal tract gait trunk diffusion tensor Trunk Control Measurement Scale Functional Ambulation Category Growth Motor Function Classification System cerebral palsy motor neural regeneration

Development of Preliminary Design Program for Combustor of Regenerative Cooled Liquid Rocket Engine

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Journal of Thermal Science 2011年第5期20卷 467-473页

作者： Won Kook Cho Woo Seok Seol Min son Min Kyo Seo Jaye Koo Korea Aerospace Research Institute DaejoenRepublic of Korea Graduate Student Korea Aerospace UniversityGoyangRepublic of Korea School of Aerospace and Mechanical Engineering Korea Aerospace UniversityGoyangRepublic of Korea

An integrated program was established to design a combustor for a liquid rocket engine and to analyze regenerative cooling results on a preliminary design *** of burnt gas from a kerosene-LOx mixture in the combustor and rocket performance were calculated from CEA which is the code for the calculation of chemical *** heat transfer of regenerative cooling was analyzed by using SUPERTRAPP code for coolant properties and by one-dimensional correlations of the heat transfer coefficient from the combustor liner to the *** of the combustors of F-1 and RS-27A engines were designed from similar input data and the present results were compared to actual data for ***,the combustors of 30 tonf class,75 tonf class and 150 tonf class were designed from the required thrust,combustion chamber,exit pressure and mixture ratio of *** wall temperature,heat flux and pressure drop were calculated for heat transfer analysis of regenerative cooling using the profiles.

关键词： Liquid rocket engine Preliminary design of Combustor Regenerative cooling

Method to assess water footprint,a case study for white radishes in Korea

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International Soil and Water Conservation Research 2017年第2期5卷 151-157页

作者： Kyounghoon Cha Minjung son Seokjin Hong Sangjoon An Soonchul Part Ecoable Consulting Corporation Jayang-dongGwangnam-guSeoul 05064Republic of Korea Korea National Cleaner Production Center Korea Institute of Industrial TechnologyTeheran-roGangnam-guSeoul 06211Republic of Korea

This study aimed to assess the water footprint of white radishes which is cultivated during four *** methodology is developed in accordance with ISO 14040s and ISO *** study suggested the water depletion and eutrophication results of white radishes as water footprint *** water de-pletion results are 25.58 m^(3) fres hwater/ton(spring season white radish),20.74 m^(3) freshwater/ton(au-tumn season white radish),26.68 m^(3) freshwater/ton(alpine region white radish),and 2856 m^(3) fresh-water/ton(facility white radish),*** the eutrophication results are 3.23E-11 kg P/ton(spring season white radish),2.66E-11 kg P/ton(autumn season white radish),3.94E-11 kg P/ton(alpine region white radish),and 1.56E-11 kg P/ton(facility white radish),*** conclusion,autumn season white radish is more competitive than other cultivation types in the context of water footprint *** a result,switching from other cultivation types to autumn season white radish is ex-pected to offer a more water-efficient means of white radish ***,drawing upon evidence within this report,decision-makers would be wise to cultivate in more effective water use cultivation type and crop species.

关键词： Water footprint Water depletion Water degradation Water quality Hydrological impact White radishes

Moving Target Landing of a Quadrotor Using Robust Optimal Guaranteed Cost Control

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IEEE/CAA Journal of Automatica Sinica 2023年第3期10卷 819-821页

作者： Kewei Xia Seong-Min Lee Wonmo Chung Yao Zou Hungsun son Department of Mechanical Engineering Ulsan National Institute of Science and TechnologyUlsan 44919South Korea Institute of Artificial Intelligence University of Science and Technology BeijingBeijing 100083China IEEE

Dear Editor,This letter proposes a robust control strategy for the autonomous landing of a quadrotor on a moving ***,a force command that consists of a cascade dynamics estimator and an optimal guaranteed cost control law is exploited for the position-loop ***,an orientation constraint torque command is employed for the attitude-loop tracking such that the quadrotor refrains from flipping during the landing operation.

关键词： Optimal constraint autonomous