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Leptomeningeal carcinomatosis of gastric cancer: Multi-center retrospective analysis of 54 cases (초)
( Sung Yong Oh ),( Sung Hyun Kim ),( Hyuk Chan Kwon ),( In Gyu Hwang ),( Joung Soon Jang ),( Gyeong Won Lee ),( Jung Hun Kang ),( Su Jin Lee ),( Jee Yun Lee ),( Ho Yeong Lim ),( Young Suk Park ),( Won 대한내과학회 2008 대한내과학회지 Vol.75 No.1S
Intra-operative Neurological Monitoring and Anesthesia
( Sang-ku Park ),( Sung-hyuk Lim ),( Chan-woo Park ),( Jin-woo Park ),( Dong-jun Kim ),( Ji-hyuk Kang ),( Hyo-geun Jee ),( Gi-bong Kim ) 대한임상검사과학회 2012 대한임상검사과학회지(KJCLS) Vol.44 No.4
The purpose of intra-operative neurological monitoring (INM) is to minimize surgically induced nerve damage, sensory nerves and motor neurons without affecting the operations to proceed during surgery such as evoked potentials (EP), electromyography (EMG), electroencephalography (EEG), transcranial doppler (TCD), etc. During the course of checking a patient’s condition, surveillance of ambulatory patients is a very different thing to check if the test is done under general anesthesia. INM can be possible or impossible depending on the type of drugs used and their concentrations because the monitoring is performed under anesthesia. Therefore, it is emphasized on the necessity of reviewing anesthesia which influences on INM.
A Digital Readout IC with Digital Offset Canceller for Capacitive Sensors
Lim, Dong-Hyuk,Lee, Sang-Yoon,Choi, Woo-Seok,Park, Jun-Eun,Jeong, Deog-Kyoon The Institute of Electronics and Information Engin 2012 Journal of semiconductor technology and science Vol.12 No.3
A digital readout IC for capacitive sensors is presented. Digital capacitance readout circuits suffer from static capacitance of sensors, especially single-ended sensors, and require large passive elements to cancel such DC offset signal. For this reason, to maximize a dynamic range with a small die area, the proposed circuit features digital filters having a coarse and fine compensation steps. Moreover, by employing switched-capacitor circuit for the front-end, correlated double sampling (CDS) technique can be adopted to minimize low-frequency device noise. The proposed circuit targeted 8-kHz signal bandwidth and oversampling ratio (OSR) of 64, thus a $3^{rd}$-order ${\Delta}{\Sigma}$ modulator operating at 1 MH was used for pulse-density-modulated (PDM) output. The proposed IC was designed in a 0.18-${\mu}m$ CMOS mixed-mode process, and occupied $0.86{\times}1.33mm^2$. The measurement results shows suppressed DC power under about -30 dBFS with minimized device flicker noise.
Lim, Choong-Sun,Seok, Sang Il,Im, Sang Hyuk The Royal Society of Chemistry 2012 Journal of materials chemistry Vol.22 No.18
<P>Uniform PS-<I>b</I>-P2VP (polystyrene-<I>block</I>-poly-2-vinylpyridine) block copolymer nanoparticles were successfully synthesized using a simple reprecipitation method. The PS-<I>b</I>-P2VP nanoparticles could serve as sacrificial templates to generate silica and titania hollow nanoparticles of ∼100 nm size.</P> <P>Graphic Abstract</P><P>The uniform PS-<I>b</I>-P2VP block copolymer nanoparticles serve as sacrificial templates to produce hollow TiO<SUB>2</SUB> nanoparticles with sub-100 nm size. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2jm30497j'> </P>
Electrochemical Study on Localized Corrosion of Laser Surface Melted Alloy 600
Lim, Yun Soo,Hur, Do Haeng,Kim, Hong Pyo,Kim, Joung Soo,Kwon, Hyuk Sang 한국부식방식학회 2002 Corrosion Science and Technology Vol.31 No.6
The effects of laser surface melting (LSM) on the resistance to localized corrosion such as intergranular stress corrosion cracking (IGSCC) and pitting of Ni-base Alloy 600 were investigated by electrochemical methods. The degree of sensitization ofthe laser heated Alloy 600 measured using the double loop electrochemical potentiokinetic reactivation method in a 0.1 M Na₂S₄O_6 + 20 ppm KSCN solution was considerably low, which demonstrates that the resistance to IGSCC of Alloy 600 in sulfur bearing environments was improved by LSM. The pitting potentials of Alloy 600 in 1 M NaCl at pH 4 and 9 were also markedly increased by the LSM process, compared with that of the non-laser treated Alloy 600. From the microscopic examination, it was found that pitting was initiated around sulfides associated TiN in the matrix of Alloy 600. Homogeneous microstructure associated with the reduction of inclusion size during LSM could be attributed to the increase of resistance to pitting corrosion in the LSM Alloy 600. On the other hand, complete dissolution of pre-existing intergranular Cr-rich carbides and the resultant Cr healing around grain boundaries was responsible for the improvement of IGSCC properties. The resistance to localized corrosion of the laser treated Alloy 600 was discussed from the results of the electrochemical test and microscopic examination.
Lim, Sung-Hyuk,Yamaguchi, Munehiro,Nishimura, Okio,Mie, Yasuhiro,Tamura, Tomohiro,Kim, Byung-Woo,Suzuki, Masaaki American Scientific Publishers 2009 Journal of Nanoscience and Nanotechnology Vol.9 No.12
<P>We have succeeded to immobilize fluorescent proteins selectively using a micro-structured organosilane self-assembled monolayer as a template. An organosilane layer with amino terminal group was formed on a thermally oxidized Si wafer by liquid-phase method and then was pattern-etched by vacuum ultraviolet light (VUV). The second organosilane layer with thiol terminal group was deposited on the etched area by chemical vapor surface modification method (CVSM). These micro-structured organosilane layer containing two reactive terminal groups were chemically modified using bi-functional linkers. Two kinds of fluorescent protein, Enhanced Cyan Fluorescent Protein (ECFP) and R-phycoerythrin were selectively immobilized on the chemically modified surface.</P>