구륜 이동 로봇의 유전 알고리즘 퍼지 제어기

김상원,류재춘,박종국,Kim Sang-won,Ryu Jae-chun,Park Chong-kug 한국정보과학회 2005 정보과학회논문지 : 기술교육 Vol.2 No.1

This paper deals with kinematics model, trajectory tracking, and a fuzzy controller using GA(genetics algorithm) for 2-DOF WMR(Wheeled Mobile Robot). The global inputs to the WMR are reference position and reference velocity, which are time variables The global output of WMR is a current position. The position of WMR is estimated by dead-reckoning algorithm. Dead-reckoning algorithm can determine present position of WMR in real time by adding up the increased position data to the previous one in sampling period. The tracking controller makes position error to be converged 0. In order to reduce position error, a compensation velocities on the track of trajectory is necessary. Therefore, a fuzzy logic controller using GA(FGAC) is proposed to give velocity compensation in this system. Input variables of fuzzy logic part are position errors in every sampling time. The output values of fuzzy logic part are compensation velocities. GA are implemented to adjust the output gain of fuzzy logic part. The computer simulation is performed to get the result of trajectory tracking and to prove efficiency of proposed controller.

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.

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

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

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

(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

$({Fe_{1-x}}{Co_x})_{89}{Zr_{11}}$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.

건강제언 - '노털카'와 '찡떼오스'

김상원,Kim, Sang-Won 한국건강관리협회 1997 건강소식 Vol.21 No.3

핀테크 활성화 방안 연구: 미국, 중국, 한국의 규제 현황 중심으로

김상원,임석진,Kim, Sang-Won,Im, Seokjin 대한산업경영학회 2021 산업융합연구 Vol.19 No.4

Fintech, a new form of financial industry that converges IT, is developing rapidly in developed countries such as the US and China. The U.S. and China lowered barriers to entry through deregulation to develop and expand the fintech industry, and, for example, encouraged startup companies to incorporate various ideas through negative regulations that are more relaxed or do not apply regulations for a certain period of time. The U.S. and China did not apply existing financial regulations to the fintech industry, providing an environment where fintech startups could grow more easily. Currently, in Korea, fintech technologies such as 'Samsung Pay', 'Toss' and 'Kakao Pay' have been developed and are being activated, and also their scale is expanding. Although various systems are being reorganized and regulated for the development of Fintech, Fintech's growth rate is slow due to unfriendly and unopened regulations in the financial sector and various markets. This paper examines the status of fintech, focusing on advanced fintech and Korea, and examines fintech-related regulations that hinder the development of the fintech industry. We propose a more flexible way of easing excessive regulation in the financial sector, such as post-regulation.