7,304 research outputs found
Endoscopic mucosal resection and endoscopic submucosal dissection as treatments for early gastrointestinal cancers in Western countries
Get PDFEarly gastrointestinal cancers are defined as lesions limited to the mucosa or submucosa without invading the muscularis propria, regardless of the presence of lymph node metastases. Although the natural history of these diseases is basically alike worldwide, its management is quite different between the East and West; aggressive surgery is frequently adopted by Western surgeons, while less invasive techniques are adopted by Asian colleagues. These techniques include endoscopic mucosal resection and endoscopic submucosal dissection which are now accepted as treatments for early gastrointestinal cancers in selected cases. Recent advances in endoscopic detection and treatment techniques, especially in Japan and Korea, have prompted Western endoscopists to learn these techniques. This review addresses recent advances regarding endoscopic resections of early gastrointestinal cancers, which promoted its use in Western countries. In addition, prospective studies on endoscopic resection in Western countries are also described
Prediction of long-term pore pressure dissipation behavior by short-term piezocone dissipation test
No full textThe coefficient of consolidation determined from piezocone dissipation test and common interpretation methods makes the predicted dissipation curve match only at 50% degree of dissipation of the measured dissipation curve. It makes it difficult to predict the long-term pore pressure dissipation behavior of in-situ soft deposits. Therefore, based on the authors' previous result [Kim YS, Lee SR, Kim YT. Application of an optimization design technique for determining the coefficient of consolidation by using piezocone test data. Computers and Geotechnics 1997;21(4): 77-93] in which an optimized coefficient of consolidation reflects well the measured dissipation trend over the input degree of dissipation range, a systematic way of predicting a more realistic pore pressure dissipation behavior at high degree of dissipation with the optimized coefficient of consolidation is proposed. It was found that, relatively over the wide range of dissipation, the optimized coefficient of consolidation is more consistent than those determined by other researchers' methods. Applied to some real examples, it is also shown that the dissipation behavior of pore water pressure at a high degree of the dissipation range can be predicted well if the coefficient of consolidation is determined using the optimization technique with the data up to around 50% dissipation. Thus, it is expected that the proposed method saves time and expenses in conducting dissipation tests in the held. (C) 2000 Published by Elsevier Science Ltd. All rights reserved
Volume-based Haptic Model for Bone-drilling
No full textThis research was supported by the Ministry of Information and Communication, Korea, under the Information Technology Research Center support program supervised by the Institute for Information Technology Advancement. (IITA-2008-C1090-0804-0002)
This work was also supported by the MKE(Ministry of Knowledge Economy), under international joint R&D program. (No. 10030198)
We would like to thank CEO Jai Kim at PRIMPO Co., Ltd. for supporting 3D models of dental instruments
Orientation and fatigue improvement of PZT thin films on cubic textured CaRuO3 electrode
No full textIn this study, we report on the (100) cube-textured Pb(Zr 0.4 ,Ti 0.6 )O 3 (PZT) thin films using a conducting perovskite CaRuO 3 (CRO) bottom electrode, and which was compared to the (111) textured PZT on Pt electrode. X-ray diffraction (XRD) reveals that the CRO bottom electrode has a pseudo-cubic nature on Si, and the PZT thin films prepared on CRO/Si shows a (100) textured growth. PZT films on CRO electrode have a well-saturated ferroelectricity with a remanent polarization (P r ) and coercive field (E c ) of 25 mu C/cm 2 and 75 kV/cm, respectively. These PZT films are more fatigue resistive character than that on Pt bottom electrode.Ministry of Education (project named “Brain Korea 21”).
Dr.Seung-Hyun Kim, in Inostek Inc., Korea, and Heesan Kim, Ph.D. candidate the
Department of Material Science & Engineering, KAIST, Korea
Supplement_file - The usefulness of the SOFA and APACHE II scoring systems for the early prediction of mortality in patients with dapsone poisoning
No full textSupplement_file for The usefulness of the SOFA and APACHE II scoring systems for the early prediction of mortality in patients with dapsone poisoning by Y Lee, SJ Kim, YS Kim, H Kim, DK Lee, J Lee, TH Go, and YS Cha in Human & Experimental Toxicology</p
Supplement_figure - The usefulness of the SOFA and APACHE II scoring systems for the early prediction of mortality in patients with dapsone poisoning
No full textSupplement_figure for The usefulness of the SOFA and APACHE II scoring systems for the early prediction of mortality in patients with dapsone poisoning by Y Lee, SJ Kim, YS Kim, H Kim, DK Lee, J Lee, TH Go, and YS Cha in Human & Experimental Toxicology</p
두경부암에서 항암치료의 전망과 이슈
No full text두경부 암은 전 세계적으로 6번째로 가장 많은 질환 으로 매년 60만명이 진단되고 35만명이 사망하고 전체 암의 5~6%룰 차지하는 질환이다.1) 새롭게 진단되는 두 경부암의 절반은 진행성 단계 (3 기 혹은 4기)로 진단되어， 다른 종류의 암종보다 높은 사망률을 보인다. 모든 병 기에서 5년생존률은 대략 60%정도 이며 국소적으로 존 재하던 두경부암의 절반은 2년 내에 국소전이나 전신전 이가 일어나서 생존률이 80%에서 35%까지 떨어지게 된 다. 항암치료 6개월 후에 재발한 환자들은 평균 6개월이 하의 생존률을 가지며 재발암이나 전이암환자의 평균 수명은 1년 이내이다.2
Mixed coupling structure for the cross coupling of comb-line filters
No full textA mixed coupling structure is proposed for the cross coupling of a comb-line filter. The proposed structure consists of an electric coupling probe and a magnetic coupling window, and the coupling required for the cross coupling of a cross-coupled filter can be achieved with much easier tuning capability than the structure with only an electric probe. A four-pole comb-line filter is designed and fabricated with the use of the proposed structure, and showed good filter response. (C) 2002 Wiley Periodicals, Inc.X1132sciescopu
Least squares phase unwrapping in wavelet domain
No full textLeast squares phase unwrapping is one of the robust techniques used to solve two-dimensional phase unwrapping problems. However, owing to its sparse structure, the convergence rate is very slow, and some practical methods have been applied to improve this condition. In this paper, a new method for solving the least squares two-dimensional phase unwrapping problem is presented. This technique is based on the multiresolution representation of a linear system using the discrete wavelet transform. By applying the wavelet transform, the original system is decomposed into its coarse and fine resolution levels. Fast convergence in separate coarse resolution levels makes the overall system convergence very fast.X1117sciescopu
Two-dimensional phase unwrapping using wavelet transform
No full textA method for solving the least squares two-dimensional phase unwrapping problem is presented. This technique is based on the multiresolution representation of a linear system using the discrete wavelet transform. By applying the wavelet transform to the original system, a better convergence condition of an equivalent new system can be achieved.X11114sciescopu
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