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浸润性乳腺癌的术前MRI强化类型能否反映预后因素和手术情况?

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国际医学放射学杂志 2020年第1期 126-126页

作者： J.koh A.Y.Park k.h.ko h.k.jung 张晓琦 Department of Radiology CHA Bundang Medical Center School of Medicine CHA University

目的旨在评估术前MRI的强化类型可否反映浸润性乳腺癌的预后因素和手术情况。方法 2014年10月—2017年7月期间484例活检证实乳腺癌的病人行术前乳腺

关键词：浸润性乳腺癌预后因素手术情况 MRI

剪切波超声弹性成像在乳腺非肿物病变鉴别诊断中潜在价值初探

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国际医学放射学杂志 2014年第2期 194-194页

作者： k,h,ko h.k.jung S.J,kim h,kim J.h,Yoon 尹丽 Department of Radiology CHA Bundang Medical Center School of Medicine CHA University 351 Yatapdong Bundang -guSeongnam-si Gyeonggi-do 463-712South Korea

目的报道应用剪切波弹性成像(SWE)在乳腺非肿物病变中应用的一些初级的经验,并提示在BI-RADS分级为4a的一些乳腺非肿物病变中,SWE可以减少一些不必

关键词：剪切波弹性成像非肿物病变 4a级乳腺超声

剪切波弹性成像诊断乳腺癌假阳性和假阴性结果的影响因素

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国际医学放射学杂志 2013年第6期 594-594页

作者： J.h.Yoon h.k.jung J.T.Lee k.h.ko 时代刘倩 Radiology Department Saint-Louis Hospital1 avenue Claude Vellefaux75010 Paris France

摘要目的研究利用剪切波弹性成像诊断乳腺癌出现假阳性及假阴性结果的影响因素。方法研究对象为2012年6月—12月期间199例女性乳腺癌病人[年龄21;8岁,平

关键词：乳腺超声剪切波肿块病理切片

Relation between etching profile and voltage-current shape of sintered SiC etching by atmospheric pressure plasma

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Plasma Science and Technology 2019年第4期21卷 137-144页

作者： D C SEOk S R YOO k I LEE Y S ChOI Y h jung Plasma Technology Research Center National Fusion Research InstituteGunsan City 54004Republic of Korea

Sintered silicon carbide(SiC)was etched by a dielectric barrier discharge source.A high voltage bipolar pulse was used with helium gas for the plasma *** stable filament plasma was generated and could be used for SiC *** the processing gas(NF3)mixing rate increased,the width and depth of the etching profile became narrower and *** differentiated V-Q Lissajous method was used for measuring the capacitances(Ceq)of the electrode after the plasma turned *** width of the etching profile was proportional to *** the current peak value/smx of the substrate current in creased,the volume removal rate of SiC *** etch depth was proportional to the ratio of/smx to ***,because of the different characteristics of the plasma disks on SiC substrate by the voltage polarity,the etching profile was ***,in high NF3 mixing process,the etching profile became stable and deeper.

关键词： dielectric barrier discharge silicon carbide plasma etching、filament discharge,surface charge

Deposition of Nano-Scaled Coatings Using Inductively Coupled Plasma

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Journal of Rare Earths 2004年第z2期22卷 153-156页

作者： D h jung B Park J J Lee School of Materials Science and Engineering College of EngineeringSeoul National UniversitySeoul 151-744Korea School of Materials Science and EngineeringCollege of EngineeringSeoul National UniversitySeoul 151-744Korea School of Materials Science and EngineeringCollege of EngineeringSeoul National UniversitySeoul 151-744Korea

Nano-scaled Ti-B-N coatings could be produced by inductively coupled plasma (ICP) assisted magnetron spurtering. The properties and microstructure of the coating can be changed drastically by applying ICP to conventional magnetron sputtering. In this work, an internal type rf ICP process is used. The core of this technology is the efficient production and control of self-depositing ions and reactive gas ions by an induced electric field. Ti-B-N coatings were prepared by using a TiB2 target and a gas mixture of N2 and Ar at 200 ℃ and a pressure of 60 mTorr. In addition to ICP, the effect of the substrate bias voltage on the structure and properties of the coating was investigated. By applying ICP and a bias voltage to the substrate the hardness of the Ti-B-N coating is increased by more than 75 GPa, as a result of enhanced ionization in the plasma. The Ti-B-N coating, which has the highest hardness, shows the best surface uniformity and a very dense structure with a grain size of 3 nm. This sample also shows a high crystallinity compared to the coating prepared using other deposition parameters.

关键词： nano-scaled coatings industively conpled plasma

Design Features and Commissioning of the Versatile Experiment Spherical Torus (VEST) at Seoul National University

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Plasma Science and Technology 2013年第3期15卷 244-251页

作者： k.J.ChUNG Y.h.AN B.k.jung h.Y.LEE C.SUNG Y.S.NA T.S.hAhM Y.S.hWANG Department of Nuclear Engineering Seoul National University

A new spherical torus called VEST （Versatile Experiment Spherical Torus） is designed, constructed and successfully commissioned at Seoul National University. A unique design feature of the VEST is two partial solenoid coils installed at both vertical ends of a center stack, which can provide sufficient magnetic fluxes to initiate tokamak plasmas while keeping a low aspect ratio configuration in the central region. According to initial double null merging start-up scenario using the partial solenoid coils, apprdpriate p6wer supplies for driving a toroidal field coil, outer poloidal field coils, and the partial solenoid Coils are fabricated and successfully commissioned. For reliable start-up, a pre-ionization system with two cost-effective homemade magnetron power supplies is also prepared. In addition, magnetic and spectroscopic diagnostics with appropriate data acquisition and control systems are well prepared for initial operation of the device. The VEST is ready for tokamak plasma operation by completing and commissioning most of the designed components.

关键词： spherical torus partial solenoids double null merging start-up

Model-based adaptive locomotion and clustering control of microparticles through ultrasonic topological charge modulation

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Applied Mathematics and Mechanics(English Edition) 2023年第4期44卷 623-640页

作者： h.S.LEE h.X.CAO D.jung C.S.kIM School of Mechanical Engineering Chonnam National UniversityGwangju 61186South Korea korea Institute of Medical Microrobotics Gwangju 61011South Korea

We present a novel motion control technique for microrobot clusters to exploit the characteristics of the ultrasonic *** method comprises two steps,i.e.,introducing an ultrasonic actuation(UA)linear model for three-dimensional(3D)locomotion and controlling the topological charge(TC)in the ultrasonic vortex for microrobot ***,the TC is a controllable parameter for the expansion and contraction of the pressure null space inside the *** present a TC control method to cluster sporadically distributed microrobots in a specific *** validate the concept,a UA system composed of 30 ultrasonic transducers with 1 Mhz frequency is fabricated,and the characteristics of the generated acoustic pressure field are analyzed through ***,the performances of the adaptive controller for precise 3D locomotion and the TC control method for clustering are ***,the UA technology,which performs both clustering and locomotion in a complex manner,is validated with a gelatin phantom in an in-vitro environment.

关键词： ultrasonic actuation(UA) topological charge(TC) adaptive control particle manipulation

State estimation for neural neutral-type networks with mixed time-varying delays and Markovian jumping parameters

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Chinese Physics B 2012年第10期21卷 29-37页

作者： S.Lakshmanan Ju h.Park h.Y.jung P.Balasubramaniam Department of Information and Communication Engineering/Electrical Engineering Yeungnam University214-1 Dae-DongKyongsan 712-749Republic of Korea Department of Mathematics Gandhigram Rural Institute-Deemed UniversityGandhigram - 624 302TamilnaduIndia

This paper is concerned with a delay-dependent state estimator for neutral-type neural networks with mixed timevarying delays and Markovian jumping *** addressed neural networks have a finite number of modes,and the modes may jump from one to another according to a Markov *** construction of a suitable Lyapunov-krasovskii functional,a delay-dependent condition is developed to estimate the neuron states through available output measurements such that the estimation error system is globally asymptotically stable in a mean *** criterion is formulated in terms of a set of linear matrix inequalities（LMIs）,which can be checked efficiently by use of some standard numerical packages.

关键词： neural networks state estimation neutral delay Markovian jumping parameters

The Gas-to-Dust Relation in the Dark Cloud L1523-Observational Evidence for CO Gas Depletion

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Chinese Journal of Astronomy and Astrophysics 2008年第6期8卷 686-692页

作者： h.G.kim B.G.kim J.h.jung korea Astronomy and Space Science Institute 61-1 Hwaam Yuseong Daejeon 305-348 Korea

Correlation between gas and dust column density has been studied for the dark globule L1523. The 13CO（J=1→0） emission is used for tracing the gas, and the IR emissions, for tracing the dust constituent. In order to match the beam resolution between the images, a beam de-convolution algorithm based on the Maximum Correlation Method （MCM） was applied on the Infrared Astronomical Satellite （IRAS） data. The morphology of 13CO column density map shows a close correlation to that of 100μm dust optical depth. The distribution of the optical depth at 100 μm follows that of gas column density more closely than does the flux map at either 60 or 100μm. The ratio of the 13CO column density to the 100μm optical depth shows a decreasing trend with increasing dust optical depth in the central part, indicating possible molecular gas condensation onto dust particles. The excessive decrease in the CO column density in the envelope may most probably be due to the photo-dissociation of CO molecules.

关键词： ISM: clouds ISM: dust ISM: molecules