$(\textrm{Fe}_{1-x}\textrm{Co}_{x})_{89}\textrm{Zr}_{11}$ 비정질 자성박막의 자기특성(II)

김상원,Kim, Sang-Won 한국재료학회 1999 한국재료학회지 Vol.9 No.8

RF 스퍼터링법으로 제작한 비정질 (Fe(sub)1-xCo(sub)x)(sub)89Zr11 자성박막의 자기특성을 Co농도에 따라 조사하였다. 130 Oe의 인가자기장중 190~20$0^{\circ}C$ 에서 10분간 2단 열처리를 행하였을때, 시편중 x=0.4의 박막은 높은 자왜를 나타냄에도 불구하고 0.25 Oe의 낮은 보자력 H(sub)c과, 8.7 MHz, 10 mOe의 여기자기장에서 측정된 미분투자율 $\mu$(sub)d는 280 정도로 가장 양호한 값을 나타내었다. 이와 같은 거동은 박막내 최적의 압축응력상태에서 야기된 자기이방성의 변화에 기인한다. Magnetic properties of (Fe(sub)1-xCo(sub)x)(sub)89Zr11 amorphous films fabricated by RF sputtering method have been investigated as a function of Co content x. By means of two step field annealing at 190~20$0^{\circ}C$ for 10 minutes in the magnetic field of 130 Oe, the film with x=0.4 among the samples shows the superior soft magnetic properties in spite of showing the high magnetostriction. For example, the obtained properties of coercivity and differential permeability measured in an exciting field of 10 mOe at the frequency of 8.7 MHz are 0.25 Oe and 280, respectively. It is confirmed that such behavior is due to the variation of magnetic anisotropies caused by a optimal compressive stress within the film.

방사선치료를 받는 말기암환자들을 대상으로 한 이완요법

김상원,전미선,김효신,Kim, Sang-Won,Chun, Mison,Kim, Hyo Shin 한국호스피스완화의료학회 2016 한국호스피스.완화의료학회지 Vol.19 No.3

방사선치료는 암과 관련된 증상을 완화시키는 목적으로 자주 사용되고 있다. 정확하고 안전한 방사선치료를 받기 위해서는 방사선이 나오는 동안 치료 테이블 위에 가만히 누워 있어야 한다. 그러나 일부 환자는 기질적인 문제 외에 심리적인 문제에서 기인한 증상으로 인해 가만히 누워 있지 못한다. 이 논문에서는 모의치료 단계 전부터 치료 테이블에 바로 누워 있지 못했지만 별 다른 장소에서의 교육 참여 없이 침상에서 쉽게 할 수 있는 이완요법을 배워 방사선치료 하는 동안 가만히 누워 있는 게 가능했던 두 명의 말기암환자 사례를 보고하고자 한다. Radiation therapy is an effective modality to alleviate cancer-related symptoms. To deliver radiation accurately, it is essential to secure stability of the treatment position in patients during each treatment time. However, some patients could be less cooperative due to their psychoemotional issues. We present two cases of terminal-stage cancer patients who were initially unable to lie still on the treatment table before simulation. A relaxation technique was taught to them on the bed, and they could relax and undergo radiation therapy with effective symptom relief.

당신은 아직도 술잔을 돌리십니까?

김상원,Kim, Sang-Won 한국건강관리협회 1998 건강소식 Vol.22 No.10

$(\textrm{Fe}_{1-x}\textrm{Co}_{x})_{89}\textrm{Zr}_{11}$ 비정질 자성박막의 자기특성(l)

김상원,김찬욱,Kim, Sang-Won,Kim, Chan-Uk 한국재료학회 1997 한국재료학회지 Vol.7 No.12

RF스퍼터링법으로 제작한 비정질(Fe$_{1-x}$ Co$_{x}$)$_{89}$Zr$_{11}$자성박막의 자기특성을 Co농도 X에 따라 조사하였다. 130 Oe의 인가자기중 1$50^{\circ}C$에서 90분간 열처리하였을 때 X=0.4, 0.5부근의 박막은 높은 자왜를 나타냄에도 불구하고 양호한 연자기 특성을나타내었다. 특히 X=0.4의 박막에서는 0.25 Oe의 낮은 보자력이 나타났으며, 1MHz, 50mOe의 여기자기장에서 측정된 교류투자율은 900정도였다. 본 연구의 박막에서 얻어진 우수한 자기특성은 외부자기장의 인가에 의해 특성의 변화가 가능한 표면탄성파(surface acoustic wave)소자에 응용될 수 있을 것으로 기대된다.된다..된다.

(Fe_1-xCo_x)₈₉Zr₁₁ 비정질 자성막에서의 자기표면탄성파 속도변화(II)

김상원,Kim, Sang-Won 한국재료학회 2002 한국재료학회지 Vol.12 No.4

The effect of field annealing on the velocity changes of magneto surface acoustic wave (MSAW) devices has been investigated for deposited $(Fe_{1-x}Co_x)_{89}Zr_{11}$ (x = 0~1.0) amorphous films. By means of two step field annealing at $195^{\circ}C$ for 10 minute in the magnetic field of 130 Oe, the MSAW device with x=0.4 film among the devices showed the superior velocity change of 0.1 %. This gigantic value was obtained in the DC bias field of 40 Oe at the exciting frequency of 8.7 MHz. It was confirmed that such behavior was due to the variation of differential permeability caused by an optimal stress within the magnetic film.

Vinylogous Intramolecular Nucleophilic Acyl Substitution Reactions Mediated by Samarium(II) Iodide

김상원,이효원,강한영,Kim, Sang Won,Lee, Hyo Won,Gang, Han Yeong Korean Chemical Society 2000 Bulletin of the Korean Chemical Society Vol.21 No.12

표층황반원공에서 유리체절제술의 치료효과와 빛간섭단층촬영을 이용한 예후인자

김상원,전혜민,안동섭,윤희성,Sang Won Kim,MD,Hye Min Jeon,MD,Dong Seob Ahn,MD,Hee Seong Yoon,MD 대한안과학회 2014 대한안과학회지 Vol.55 No.12

Purpose: To evaluate the prognostic factors that predict visual outcome after vitrectomy for lamellar macular hole using optical coherence tomography (OCT). Methods: This study included 26 eyes that underwent pars plana vitrectomy, epiretinal membrane removal, and internal limiting membrane peeling for lamellar macular hole. The maximum parafoveal thickness, maximum height and diameter of lamellar macular hole, maximum height and diameter of intraretinal splitting, thinnest foveal floor thickness, and inner segment/outer segment disruption length on preoperative OCT image were investigated for prognostic factors that predict visual outcome. Results: The mean follow-up period was 32.2 months and the mean best corrected visual acuity improved significantly after vitrectomy from log MAR 0.47 ± 0.32 to log MAR 0.23 ± 0.23. The postoperative visual acuity correlated significantly with preoperative visual acuity, thinnest foveal floor thickness and inner segment/outer segment disruption length, but not with maximum parafoveal thickness, maximum height and diameter of lamellar macular hole and maximum height and diameter of intraretinal splitting. Conclusions: The thinnest foveal floor thickness and inner segment/outer segment disruption length on preoperative OCT image were significant prognostic factors.J Korean Ophthalmol Soc 2014;55(12):1853-1859

스테인레스 제강분진을 함유한 순철 압분코아의 자기특성

김상원,Kim S. W. 한국재료학회 2005 한국재료학회지 Vol.15 No.2

Effects of stainless steel-making dusts and binder content on compacting $density(\rho)$ and magnetic properties were evaluated. Cores compacted with the mixture of pure Fe powders, $5wt.\%$ dusts and $0.25wt.\%$ binder showed good AC magnetic properties. For example, permeability$({\mu}a)$ and core loss(P) of the cores containing $5wt.\%$ dusts at 500 kHz were 62 and $4008\;{\mu}W/cm^3$, respectively. These properties are almost equivalent to those of competitor's products (i.e, Ancorsteel TC 80 produced by $H\ddot{o}gan\ddot{a}s$ Corp.). The powdered cores obtained from the present work are expected to apply for high-performance soft magnetic components such as normal mode choke filter and pulse transformer.

$({Fe_{1-x}}{Co_x})_{89}{Zr_{11}}$비정질 자성 막에서의 자기표면탄성파 속도변화 (I)

김상원,Kim, Sang-Won 한국재료학회 2001 한국재료학회지 Vol.11 No.6

쐐기형 전극 사이에 열처리전 비정질 ($Fe_{1-x}$ $Co_{x}$ )$_{89}$ $Zr_{ 11}$ (x=0~1.0) 자성막이 증착된 MSAW 소자를 구성하고 외부 인가자기장에 의한 MSAW 속도변화율을 조사하였다. 그 결과 MSAW 속도변화율은 직류 인가자기장, 구동주파수, 자성막의 두께 및 조성에 민감하게 의존하였으며, 특히 구동주파수 및 자성막의 두께가 증가할수록 증가함을 확인하였다. 열처리전 시편에서 나타난 최대 속도변화율은 x=0.8에서 얻어진 0.062%였다. The velocity changes of magneto surface acoustic wave (MSAW) have been investigated in the MSAW devices composed of wedge type transducer and as-sputtered ($Fe_{1-x}$ $Co_{x}$ )$_{89}$ $Zr_{ 11}$ (x=0~1.0)amorphous films on glass substrates. The velocity changes of devices depended sensistively on exciting frequency of MSAW, applying the DC bias magnetic field. film thickness and film composition. Particularly. it was conformed that velocity changes increased with the increase of the exciting frequency of MSAW and the thickness of magnetic films. A device deposited x= 0.8 film along the MSAW propagation direction among the devices exhibited a large velocity change of 0.062% at 8.7 MHz for the applied field of 70 Oe.

특발성 황반전막에서 빛간섭단층촬영상의 형태학적 분류에 따른 수술 전후 망막층별 두께변화분석

김상원,박재홍,안동섭,윤희성,Sang Won Kim,Jae Hong Park,Dong Seob Ahn,Hee Seong Yoon 대한안과학회 2014 대한안과학회지 Vol.55 No.12

Purpose: To evaluate the changes in each retinal layer thickness according to preoperative optical coherence tomography (OCT) patterns after idiopathic epiretinal membrane (ERM) removal and to investigate the correlation between retinal layer thickness and visual improvement. Methods: The medical records of 63 patients (63 eyes) who underwent vitrectomy with internal limiting membrane (ILM) peeling for idiopathic ERM and followed for more than 6 months were retrospectively reviewed. The OCT images of preoperative idiopathic ERM were classified into 3 patterns being flat, convex, and concave. Then, the changes of each retinal layer thickness were compared among OCT patterns and the correlations between retinal layer thickness and visual improvement were analyzed. Results: Improvement in visual acuity was measured in the following order: concave, flat, and convex patterns. The patients with the convex pattern only showed significant improvement of visual acuity. Ganglion cell layer plus inner plexiform layer (GCL + IPL), inner nuclear layer (INL), and outer plexiform layer (OPL) thicknesses were significantly larger in preoperative ERM patients than in normal controls in the following order: convex, concave, and flat patterns. Retinal layer thickness decreased significantly in GCL + IPL and INL after surgery in convex, flat, and concave patterns, in that order. Generally, preoperative retinal layer thickness and postoperative visual acuity were not correlated. However, improvement of visual acuity was significantly related to GCL + IPL and INL thicknesses in the convex pattern and IPL thickness in the flat pattern. Conclusions: In patients with idiopathic ERM, preoperative difference in each retinal layer thickness according to preoperative OCT patterns was observed. After ERM removal, reduction of each retinal layer thickness and specific retinal layer related to visual improvement was different according to preoperative OCT patterns.J Korean Ophthalmol Soc 2014;55(12):1843-1852