토끼의 정상 신장의 초음파 유도하 고주파열치료: 전산화단층촬영과 병리조직학적 연관

김상원,이정민,김종수,이상훈,Kim, Sang-Won,Lee, Jeong-Min,Kim, Chong-Soo,Lee, Sang-Hun 대한영상의학회 2002 대한영상의학회지 Vol.46 No.1

Purpose: To assess the feasibility and safety of using a cooled-tip electrode to perform percutaneous radiofrequency ablation of kidney tissue in rabbits, and to evaluate the ability of CT to reveal the appearance and extent of tissue necrosis during follow-up after ablation. Materials and Methods: Using ultrasound guidance, a 17-G, cooled-tip electrode was inserted into the right lower portion of the kidney in 26 New Zealand White rabbits. Radiofrequency was applied for 2 mins, and biphasic helical CT scanning was used to assess tissue destruction and the presence or absence of complications immediately after the procedure and at 24 hrs, 2 and 3 days, and 1, 2, 3, 4, 5, 6 and 7 weeks. The study had three phases: acute [immediately killed : N=10]; subacute [killed at 24 hrs (n=3), 2 days (n=3), 3 days (n=1) : N=7]; chronic [killed at 1 week (n=4), 2 weeks (n=2), 4 weeks (n=1), 7 weeks (n=1) : N=8]. After the animals were killed, their kidneys were histopathologically examined and the radiologic and pathologic findings of lesion size and configuration were correlated. Results: In each instance, ultrasound-guided radiofrequency ablations of the lower pole of the kidney were technically successful. Contrast-enhanced biphasic helical CT revealed regions of hypoattenuation devoid of parenchymal enhancement, and these correlated closely with true pathologic lesion size (r=0.884; p>0.05). In subacute and chronic models, CT scanning revealed gradual spontaneous resorption of the ablated lesion and the presence of perilesional calcification. Histopathologically, in the acute phase the ablated lesions showed coagulative necrosis and infiltration of inflammatory cells, and in the chronic phase there was clear cut necrosis of glomeruli, tubules and renal interstitium, with diminishing inflammatory response and peripheral fibrotic tissue formation. Conclusion: Ultrasound-guided renal radiofrequency ablation is technically feasible and safe. In addition, the avascular lesion measured at contrast-enhanced helical CT closely correlated with the size of ablated tissue. Contrast-enhanced CT may therefore be used for serially monitoring the effect of radiofrequency ablation. In the future, RF ablation may offer an alternative treatment option for renal cancer.

다니자키 준이치로문학과 이상문학 비교연구1

김상원(Kim, Sang-Won) 동북아시아문화학회 2015 동북아 문화연구 Vol.1 No.45

This paper compared and reviewed Tanizaki Junichiro literature and Lee Sang literature with a focus on three topics of ‘complex’, ‘succubism’, and ‘longing for modernization’. As esthetic writer and surreal psychological writer, writer from the ruling country and writer from the ruled country, writer who lived long while earning favorable reviews by the literary world and writer who died young while being despised by the public, two writers are seen as writers from the remote worlds not to be compared with each other at first glance. However, the above three patterns shown in the works of two writers can be said to be the commonalities of their literature. First, ‘complex’ resulted from the appearance inferiority in the case of Tanizaki and was caused by gynophobia in childhood in the case of Lee Sang. Second, ‘succubism’ was associated with two writers’ common experience of maternity love of in childhood, that is, an Oedipus complex. And finally, in the case of ‘longing for modernization’, it was found that an Edo native Tanizaki and Lee Sang reflected the desire for modernization in their works in westernized Tokyo at that time and Gyeongseong in 1930s being capitalized during the Japanese colonial period, respectively.

SL 무기질 바닥재의 경제성 분석에 관한 연구

박호근 ( Ho Geun Park ),홍성욱 ( Seong Wook Hong ),양재영 ( Je Yong Yang ),김상원 ( Sang Won Kim ),신찬호 ( Chan Ho Shin ),최민권 ( Min Kwon Choe ) 한국건축시공학회 2011 한국건축시공학회 학술발표대회 논문집 Vol.11 No.1

This study is concerned with the development of the SL inorganic floor covering. First, volatile organic compounds, inorganic test profile on the SL through the flooring is environment-friendly inorganic noncombustible floor finishes the event of fire toxic gases (such as volatile organic compounds) emissions have been identified as not at all. Second, SL-breathable material, the concrete floor to prevent aging, long life, which are three levels of noise, shock-absorbing function was decreased. Third, SL economic analysis of mineral flooring terrazzo tile floors compared with the normal material. On a terrazzo tile cost 13,500 won ~ 24,500 won, but It have found that, in terms of labor SL 36,899 won ~ 38,899 won flooring mineral balance. Occurs in the total amount when compared with terrazzo tile floors and 25,399 won 3T, 5T and economical analysis concludes that the original 12,399 won.

당신은 아직도 술잔을 돌리십니까?

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

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

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

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.

(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.

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

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

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.

$(\textrm{Fe}_{1-x}\textrm{Co}_{x})_{89}\textrm{Zr}_{11}$ 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.

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

제올라이트 NaA 의 삼성분 이온교환평형 예측에 관한 연구

김상원,한상섭,조찬휘,이한주 ( Sang Won Kim,Sang Sup Han,Chan Hwi Cho,Hanju Lee ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.3

A study has been made to predict multicomponent ion exchange equilibria data from the corresponding binary isotherms in zeolite NaA. Na/Sr/Cs and Na/Ca/Mg ternary isotherms are presented, together with isotherms for the six binary systems (Na/Sr, Na/Cs, Sr/Cs, Na/Ca, Na/Mg and Ca/Mg systems). Predictive equations for these ternary systems could be solved iteratively using activity coefficients and thermodynamic equilibrium constants for the binary systems obtained from experimental data. The zeolite phase activity coefficients were obtained from the Wilson model. Na/Sr/Cs ternary system displayed high selectivity for Sr^(2+) ion and the presence of Sr^(2+) ion significantly influenced the relative selectivity of Na/Cs in this ternary system. Na/Ca/Mg ternary system showed high selectivity for Ca^(2+) ion and equilibrium of this system was not significantly affected by the introduction of a third ion. The prediction method was found to be in agreement with experimental data within 15-20% relative error.