객체지향 개념을 적용한 하이퍼미디어 개발방법

서성채,방만원,김병기 木浦大學校 情報産業硏究所 1996 情報産業硏究誌 Vol.4 No.-

하이퍼미디어 개발 방법은 하이퍼 미디어 어플리케이션에 큰 영향을 미친다. 특히 하이퍼 미디어 특성인 대용량성,데이터베이스 검색, 상호작용성을 지원하도록 하기 위해서는 정형화된 하이퍼미디어 개발 방법이 필요 하게 된다. 이 개발 방법은 객체지향 개념을 적용한 기존의 하이퍼 미디어 개발방법(OOHDM) 에 기초하여, 소프트웨어 개발방법인 OMT의 방법을 적용하여 정형화시킴으로써 하이퍼미디어의 특징인 동적성질과 확장성을 지원하며 생산성을 증진시키는데 목적이 있다.

連繫된 電力系統에서의 最適負荷 周波數 制御

韓萬春,申明澈,張成煥,李基西 연세대학교 산업기술연구소 1979 논문집 Vol.11 No.1

A linear state equation of the first order differential form relating the load-frequency dynamic characteristics of interconnected power systems was derived for use in computer simulations. A new solution of the algebraic matrix Riccati equation for applications in quadratic optimal controllors and least-square state estimators determination was developed. The program for a dynamic state equation for two interconnected control areas was developed. The optimized load-frequency deviation was analysed and a numerical analysis was tried based on the computer simulation. It was shown that the dynamic response of the load-frequency could be optimized with the weighting factors R and Q The result was that the load-frequency and the tie-line deviation were visibly reduced.

체성분이 폐경 전후 여성의 골밀도에 미치는 여향

배성욱,남철현,신두만,차경미,서인선 慶山大學校 保健福祉硏究所 2002 保健福祉硏究 Vol.7 No.-

Objectives : To evaluate the degree of bone mineral density and prevalence rate of osteoporosis according to age and to search the preventive strategy for osteoporosis, the factors that affect on bone density were studied in Physical Characteristics of pre- and postmenopausal women in korea. Methods : The subjects were 961 premenopausal and 1,167 postmenopausal women who have examined in health promotion center of Yeungnam University Hospital in Daegu city from January, 1999 to January, 2001. The test for bone mineral density, biochemical factors, and body composition were done. Results : 1) The prevalence rates of reduced bone mineral density and osteoporosis in premenopausal women were 23.8% and 1.6%, respectively. However, these values were increased to 46.1% and 28.1% in postmenopausal women. 2) The body weight and height were important predictive factors for bone mineral density. The effects of age, body weight, and height on bone mineral density were 39%. The body weight was correlated statistically significantly with bone mineral density in pre- and postmenopausal women. The higher body mass index (BMI), the greater value of bone mineral density was revealed in pre- and postmenopausal women. 3) The correlation between body composition adjusted for body weight and bone mineral density revealed similar pattern between pre- and postmenopausal women. The height, lean body mass, muscle mass, mineral content, and mineral fraction were positively correlated with bone mineral density, however, body fat mass, percent body fat, waist/hip ratio, and BMI were correlated negatively with bone mineral density. 4) There was no direct correlation between cardiovascular risk factor and bone mineral density in this study, however, further study is needed because cardiovascular disease and osteoporosis have common risk factor and the prevention of osteoporosis can help to prevent cardiovascular disease. 5) In multiple regression analysis among bone mineral density as a dependent variable and independent variables (age, body weight, height, Ca/creatinine ratio, and alkaline phosphatase (ALP)), ALP revealed statistically significant inverse correlation with bone mineral density. Conclusions : These results suggested that to prevent osteoporosis, the systemized program including physical condition for promoting anti-osteoporotic factor have to be developed and apply from the thirties whom have maximal bone mineral density.

표층확대형 조기위암 1예

고성만,김기훈,서호종,서광섭,유광렬,채선애,임병욱,김홍자,김호정,김진승,허병원,김해경 중앙대학교 의과대학 의과학연구소 2001 中央醫大誌 Vol.26 No.3

The superficial spreading type of early gastric cancer has usually been defined as an early gastric cancer in which the product of the longest diameter and the diameter perpendicular to it was greater than 25㎠. Although the superficial spreading type of early gastric cancer is histologically aggressive compared with those without such histological aggressiveness, the 5 year survival rate is as good as a non-superficial spreading types of early gastric cancers if the wide surgical resection with extensive lymph node dissection is performed as a treatment. We experienced a case of superficial spreading early gastric cancer in a 59-year-old man. This case is reported with a brief review of related literature.

Pentaerythritol Tetrabenzenesulfonate 와 (1R, 2R)-Diaminocyclohexane을 이용한 광학활성 Polyamine 의 합성과 특성

金洋,金瑞香,鄭聖勳,李萬吉 고신대학교 자연과학연구소 1996 고신대학교 자연과학연구소 논문집 Vol.6 No.-

광학활성 polyamine을 합성하기 위하여 pentaerythritol[2,2-bis(hydroxymethyl)propane -1, 3-diol]tetrabenzenesulfonate와(1R, 2R)-diaminocyclo hexan을 반응시켰다. 그리고 polyamine 생성물을 분리하기 위하여 코발트(Ⅲ)착물을 합성하고 Dowex 50W-X2 양이온 교환 수지를 이용하여 크로마토그래피를 행하였다. 코발트(Ⅲ)착물의 결정구조 해석에 의하여 3,3-Bis(2-aza- (1'R, 2'R)-2'-arninocyclohexyl)-heptahydro- (1"R, 2"R)-1,4-cyclohexanodi azepine (L¹)이 확인되었으며, 착물 내에서 고리 내의 질소원자는 배위되지 않고 양성자화 되어있으며, 초록색의 단핵분자인 trans- dichlorotetramine 착물, trans-[CoC1₂ (H2L1)]Cl₃·4.5H₂O이 결정되었다 Co(Ⅲ) 주위의 내부 배위권은 네자리의 선형 tetramine이 적도면을 점유하며, 두 개의 chloro 리간드가 꼭지점을 점유하는 대략적인 괄면체이다. Co-Cl 결합길이는 2.261(1)Å 및 2.249(2)Å 이다. 금속이온 주위의 결합각은 비교적 스트레인을 받지 않으며 모든 trans각도는 176˚ 보다 크다: 또한 Co-N 결합길이 1.941(4)∼1.986(4)Å는 일반적으로 스트레인 을 받지 않는 trans-(CoCl₂N₄)^(+) 종의 각과 비슷하다. 두 개의 5원 킬레이트고리의 배치는 gauche이며 절대배치는 λ 이다. 한 개의 6원 킬레이트 고리는 skew-boat 배치이다. 비대칭 2차 질소의 배치는 모두 S이다. In order to synthesise the optically-active polyamine, pentaerythritol [2,2-bis(hydroxymethyl)propane-l,3-diol] tetrabenzenesulfonate and (1R, 2R)-diamino cyclohexane have been treated. And in order to separate the polyamine product, cobalt(Ⅲ) complex has been synthesised and chromatographied by Dowex 50W-X2 cation exchange resin. 3,3-Bis{2-aza- (1'R, 2'R)-2'-aminocyclohexyl}-heptahydro-(l"R, 2"R)-l,4-cyclohexanodiazepine(L¹ ) has been confirmed by crystal-structure determination on its cobalt(Ⅲ) complex, where the ring nitrogen atoms are uncoordinated and protonated, as a green, mononuclear trans- dichlorotertramine complex, trans-[CoCl₂(H₂L¹) ]Cl₃·4.5H₂O. The inner coordination spher around Co(Ⅲ) is approximately octahedral, with the tetradentate linear tetramine occupying the equatorial plane and two chloro ligands the apices. Co-Cl bond lengths are 2.26KDA and 2.249(2)Å. The angular environments about the metal relatively unstrained, all trans angles being greater than 176˚: the Co-N bond lengths, 1.941(4)-1.986(4) A, also are closely clustered around values typical of unstrained trans-[CoCl₂N₄]^(+) species. The conformation of two five-membered chelate rings are gauche, with absolute configuration A. The one six-membered chelate ring assume the skew-boat conformation. The configuration of the asymmetric secondary nitrogen atoms are both S.

좌각차단을 동반한 심부전증 환자에 실시한 양심실 심박조율기 치료 : 증례 보고

김찬욱,차태준,김성만,김민대,권성일,서수홍,최병주,주승재,이재우 고신대학교 의학부 2002 高神大學校 醫學部 論文集 Vol.17 No.1

Epidemiological studies suggest that 30-50% of patients diagnosed with symptomatic congestive heart failure(CHF) have electrocardiographic evidence of a major intraventricular conduction delay, which may worsen left ventricular systolic and diastolic dysfunction through asynchronous ventricular contraction and paradoxical interventricular septal wall motion. Biventricular pacing is an emerging therapy allowing simultaneous electrical stimulation of the both ventricles with an implantable pacing system and it improves hemodynamics and well-being of patient by reducing ventricular asynchrony. Recently, we underwent biventricular DDD pacemaker implantation in a patient with CHF and Left bundle branch block and was significantly improved exercise tolerance and quality of life in that patient.

Changes in Refraction and Axial Length According to the Viscosity of Intraocular Silicone Oil

Man Seong Seo,Sun Taek Lim,Hyun Dong Kim,Byeong Il Park 대한안과학회 1999 Korean Journal of Ophthalmology Vol.13 No.1

We performed this study to evaluate the changes in refraction and axial length induced by intraocular silicone oil, and to compare with various clinical parameters between 1,000 and 5,000 cSt silicone oil. The refraction length was measured with an autorefractometer, and the axial length was measured with A-scan ultrasonography. These measurements were performed before and after removal of the silicone oil, using a clear cornea technique in which the silicone oil was injected in combination with pars plana vitrectomy. The mean age of the 25 patients was 38.73 years. On average the intraocular retention after the removal of the silicone oil lasted 5.13 months, and the follow-up time following silicone oil removal was 4.37 months. The changes in refraction and axial length were 6.32 diopters and 12.02 mm, respectively. Eyes injected with 5,000 cSt (11 eyes) tended to have higher changes in the refraction (5.84 vs 6.86 diopters) and axial length (11.70 vs 12.34 mm) than did eyes injected with 1,000 cSt silicone oil (14 eyes). Statistically significant differences were shown for the changes in refraction (p = 0.010) and intraocular pressure (0.63 vs 2.00 mmHg; p = 0.006), whereas but not for the changes in axial length (p = 0.306) and visual acuity (14/100 vs 15/100; p = 0.125). Intraocular silicone oil induced changes in refraction and axial length, and these changes seemed to vary with different viscosities.

Intravitreal Cysticercosis

Seo, Man-Seong,Woo, Je-Moon,Park, Yeoung-Geol KJO 1996 Korean Journal of Ophthalmology Vol.10 No.1

Phacofragmentation for the treatment of a completely posterior dislocation of the total crystalline lens

Man Seong Seo,Kyung Chul Yoon,Chang Han Lee 대한안과학회 2002 Korean Journal of Ophthalmology Vol.16 No.1

In order to evaluate the effectiveness and safety of intravitreal phacofragmentation, we analyzed cases of pars plana vitrectomy (PPV) with intravitreal phacofragmentation and scleral fixation of an intraocular lens (IOL) performed in patients with a crystalline lens completely dislocated into the vitreous cavity without any damage to the lens capsule. Of the 23 eyes examined, the dislocated lens was related with a hypermature cataract in 4 eyes and Marfan syndrome in 2 eyes, developed after argon and Nd:YAG laser iridotomy in 2 eyes, and was due to ocular trauma in 15 eyes. The dislocated lens was present for more than a year in 6 eyes and less than 4 weeks in 13 eyes. PPV, intravitreal phacofragmentation and scleral fixation of IOL were performed in all 23 eyes. Additionally, trabeculectomy was performed in 4 eyes, iridoplasty in 1 eye and cryopexy with intravitreal injection of sulfur hexafluoride in 2 eyes. Perfluorocarbon liquid was used in 9 eyes. The mean follow-up period was 11.7 months. On final examination, the visual acuity was better than 20/40 in 17 eyes (73.9%) and counting fingers in 1 eye due to traumatic optic neuropathy. There was no postoperative retinal detachment. These results demonstrated that PPV with intravitreal phacofragmentation and other combined procedures is a safe and effective surgical method for treating a completely dislocated crystalline lens.

Management of posteriorly dislocated intraocular lens using pars plana vitrectomy

Man Seong Seo,Chang Ryong Kim,Hyeon Ju Nah,Yeon Lee,Yeoung Geol Park 대한안과학회 2000 Korean Journal of Ophthalmology Vol.14 No.2

In order to evaluate the results of pars plana vitrectomy (PPV) for the treatment of posteriorly dislocated intraocular lens (PC-IOL), we retrospectively examined and analyzed the hospital records of patients who had undergone PPV to exchange or reposition a PC-IOL dislocated into the vitreous cavity. Of 20 eyes in 20 patients, IOL exchange was performed in 6 eyes, and IOL repositioning in 14 eyes. Posteriorly dislocated IOL occurred in 14 eyes during or within 2 days, and in 6 eyes 6 months after the IOL implantation. Thirteen eyes were surgically treated early after the occurrence, within 3 days, while 7 eyes were treated later, between 5 to 7 days. Compared with preoperative best-corrected visual acuity, the final visual acuity improved more than 2 lines in 12 eyes. With no significant difference on the statistics, earlier visual rehabilitation seemed to be shown in late-treated patients than in early-treated. Accordingly, a posterior dislocation of IOL can be successfully treated with PPV, and barring any serious complications such as retinal detachment, there is no need for surgery immediately following the occurrence.