크라온에테르를 이용한 탈륨(I) 이온 선택성 전극

김성민,정성욱,김진은,김재상,Sung Min Kim,Sung Uk Jung,Jineun Kim,Jae Sang Kim 대한화학회 1993 대한화학회지 Vol.37 No.8

Tl$^+$이온 센서로서 크라운 에테르 B15C5와 DB18C6를 중성운반체로 한 PVC 액체막 이온 선택성 전극을 제작하였다. 막용매로는 DOA, NPPE 및 NPOE를 사용하였으며 친유성 염, KTClPB의 농도를 변화시킨 여러가지 조성의 막을 시험하였다. B15C5와 DB18C6 막 전극의 감응전위는 농도범위, 10$^{-1}$∼10$^{-5}$M에서 직선으로 나타났으며 최대 기울기는 전극에 따라서 40∼55 mV/decade였다. 선택계수는 분리용액법으로 결정하였으며 알카리금속 이온, 알칼리토금속 이온 및 일부 전이금속 이온에 대하여 좋은 선택성을 나타냈다. 제작된 액체막 전극은 Ph > 3 에서 안정한 감응전위를 보였다. Poly(vinyl chloride)(PVC) membrane electrodes based on the lipophilic neutral carrier, dibenzo-18-crown-6(DB18C6) and benzo-15-crown-5 (B15C5) as the active sensors for Tl$^+$ ion have been prepared and tested in different content of the potassium tetrakis(4-chlorophenyl)borate (KTClPB) as lipophilic salt. Dioctyl adipate (DOA), 2-nitrophenyl phenyl ether (NPPE) and o-nitrophenyl actyl ether (NPOE) were used as plasticizing solvent mediators. Electrodes exhibited good linear responses of 40∼55 mV decade$^{-1}$ for Tl$^+$ ion within the concentration ranges 10$^{-1}$∼10$^{-5}$M TlNO$_3$. Selectivity coefficients of interfering ions (alkali metal, alkaline earth metal and some transition metal ions) for Tl$^+$-ISE were determined by separate solution method and were sufficiently small for most of them. These crown ether type ion-selective electrodes are suitable for use with aqueous solution at pH > 3.

신설 프리캐스트 콘크리트 포장 시공방법 및 설계지침 개발

김성민,박희범,양성철,한승환,Kim, Seong-Min,Park, Hee-Beom,Yang, Sung-Chul,Han, Seung-Hwan 한국도로학회 2008 한국도로학회논문집 Vol.10 No.2

This study was conducted to investigate the feasibility of the expedite construction of new pavement systems using precast concrete slabs and to develop the design and construction guide based on the results of the experimental construction. Half scale concrete slabs were designed and fabricated and the optimal reinforcement design, linkages between the slabs in the longitudinal and transverse directions, and the grouting methods were investigated. The experimental construction was performed fast and easily by assembling two slabs in the longitudinal direction and the other two in the transverse direction. The slabs were leveled and the pockets and the space between the slab bottom and the underlying layer were grouted. From the experimental construction, details about the design and construction of the precast pavements were acquired. Finally, the design and construction guide for the newly constructed precast concrete pavement systems was developed. 본 연구는 프리캐스트 콘크리트 슬래브를 이용한 급속 신설 도로 포장 공법의 국내 적용성을 분석하기 위한 기초 연구를 수행하고 시험시공을 통해 선설 프리캐스트 포장의 설계 및 시공 지침을 개발하기 위하여 수행되었다. 시험시공을 위해 가로, 세로, 깊이가 각각 실제 포장 슬래브의 1/2 크기인 슬래브를 설계하여 제작하였으며 이에 적합한 철근배근, 종방향과 횡방향의 연결부, 그라우팅 방법 등에 대하여 분석을 수행하였다. 이러한 슬래브를 이용하여 종방향과 횡방향으로 두 개씩 총 4 개의 슬래브를 연결하여 평탄성을 조절한 후 포켓 부분과 슬래브 하부의 공간을 그라우팅 함으로써 시공을 신속 용이하게 수행하였다. 시험 시공을 수행하며 프리캐스트 포장의 설계 및 시공과 관련된 세부 사항을 면밀히 분석하였으며 이에 바탕을 두어 프리캐스트 슬래브를 이용하여 급속하게 신설 도로를 건설할 때의 설계 및 시공 지침을 개발하였다.

키넥트를 이용한 실내에서의 키 추정 방법

김성민,송종관,윤병우,박장식,Kim, Sung-Min,Song, Jong-Kwan,Yoon, Byung-Woo,Park, Jang-Sik 한국전자통신학회 2014 한국전자통신학회 논문지 Vol.9 No.3

객체 인식은 지능적이고 다양화된 범죄 예방을 위해 감시 시스템에서 중요한 기술이다. 사람의 신체 정보인 키는 대상이 가지고 있는 신체적인 특징으로 신원을 확인하는데 중요한 정보가 될 수 있다. 본 논문에서는 RGB-Depth 카메라, 키넥트를 활용한 새로운 키 추정 방법을 제안한다. 사람의 키를 측정하기 위해 키넥트의 높이를 알고 있는 것으로 가정하고, 키넥트에서 머리와 발까지의 거리를 키넥트의 깊이 정보를 이용하여 사람의 키를 추정한다. 실험을 통하여 제안하는 방법이 실내에서 사람의 키를 추정하는데 효과적임을 확인한다. Object recognition is one of the key technologies of the monitoring system for the prevention of crimes diversified the intelligent. The height is one of the physical information of the person, it may be important information to confirm the identity with physical characteristics of the subject has. In this paper, we provide a method of measuring the height that utilize RGB-Depth camera, the Kinect. Given that in order to measure the height of a person, and know the height of Kinect, by using the depth information of Kinect the distance to the head and foot of Kinect, estimating the height of a person. The proposed method throughout the experiment confirms that it is effective to estimate the height of a person in the room.

다초점 인공수정체 삽입 후 3개월 임상결과 및 만족도 비교연구

김성민,김치훈,정의상,정태영,Sung Min Kim,Chi Hoon Kim,Eui-Sang Chung,Tae-Young Chung 대한안과학회 2012 대한안과학회지 Vol.53 No.2

Purpose: To evaluate the visual outcome and patient satisfaction at three months after implantation of ReSTOR? Aspheric multifocal IOL D1 (+3.0 D) and D3 (+4.0 D) in unilateral and bilateral cataract surgery groups. Methods: Among 73 patients who received cataract surgery and implantation of D1 or D3, visual outcome and satisfaction score of 34 patients in the unilateral surgery group and 39 patients in the bilateral surgery group were analyzed respectively. The unilateral surgery group was divided into 2 sub-groups (D1, D3), and the bilateral surgery group was sub-divided into 3 groups (D1/D1, D1/D3, D3/D3) according to the combination of implanted IOL. Uncorrected near visual acuity (UNVA, 30 cm), uncorrected intermediate visual acuity (UIVA, 40 cm, 50 cm), uncorrected distant visual acuity (UDVA) and best corrected visual acuity (BDVA) were measured at three months postoperatively. Also, all patients answered questionnaires to assess satisfaction. Results: In the unilateral surgery sub-groups, visual acuity of the D1 group was higher than that of the D3 group at 50 cm (p < 0.001), although the D3 group showed better visual outcome at 30 cm (p < 0.001). In satisfaction analysis, the D1 group reported significantly higher scores in three categories (general satisfaction with surgery; p = 0.027, intermediate vision; p < 0.001, recommendation to others; p = 0.026). Among the bilateral surgery groups, the D1/D1 group showed the best intermediate visual acuity at 50 cm (p = 0.011), and the D3/D3 group achieved the highest postoperative near visual acuity (p = 0.004). In satisfaction analysis, the scores of the three categories (general satisfaction with surgery; p = 0.008, intermediate vision; p < 0.001, recommendation to others; p = 0.006) showed significant differences among the three groups, with the D1/D1 group reporting the highest scores in all three categories. Conclusions: In bilateral ReSTOR? lens implantation, insertion of D1 in both eyes is expected to achieve the most favorable visual outcome and patient satisfaction. In unilateral ReSTOR? lens implantation, implantation of D1 rather than D3 would be more advantageous in general. J Korean Ophthalmol Soc 2012;53(2):230-237

영상기반 보행자 키 추정 방법

김성민,송종관,윤병우,박장식,Kim, Sung-Min,Song, Jong-Kwan,Yoon, Byung-Woo,Park, Jang-Sik 한국전자통신학회 2014 한국전자통신학회 논문지 Vol.9 No.9

객체인식은 지능적이고 다양화된 범죄 예방을 위한 영상 감시 시스템에서 중요한 기술 중 하나이다. 사람의 신체 정보인 키는 그 대상이 가지고 있는 신체적인 특징 중 하나로 신원을 확인하는데 중요한 정보가 될 수 있다. 본 논문에서는 CCTV 영상으로부터 보행자를 검출하고 검출된 객체인 보행자의 키를 추정하는 방법을 제안하였다. 이를 위하여 GMM(Gaussian Mixture Model) 방식을 이용하여 움직이는 객체를 분리하고, 분리된 후보 객체들의 가로세로 비율, 크기 등의 조건을 이용하여 보행자를 검출하였다. 제안한 방법을 CCTV 영상에 적용하고 동일 보행자에 대하여 근거리, 중거리, 원거리의 위치에서 키를 추정하고 정확성을 평가하였다. 실험결과 근거리에서 97%, 중거리에서 98%, 원거리에서 97% 이상의 정확도로 키 추정이 가능함을 보였다. 또한 영상내의 보행자는 위치에 따라 크기가 다르지만 실험을 통하여 제안하는 방법이 보행자의 위치에 관계없이 키를 추정하는데 효과적임을 확인하였다. Object recognition is one of the key technologies of the monitoring system for the prevention of various intelligent crimes. The height is one of the physical information of a person, and it may be important information for identification of the person. In this paper, a method which can detect pedestrians from CCTV images and estimate the height of the detected objects, is proposed. In this method, GMM (Gaussian Mixture Model) method was used to separate the moving object from the background and the pedestrian was detected using the conditions such as the width-height ratio and the size of the candidate objects. The proposed method was applied to the CCTV video, and the height of the pedestrian at far-distance, middle- distance, near-distance was estimated for the same person, and the accuracy was evaluated. Experimental results showed that the proposed method can estimate the height of the pedestrian as the accuracy of 97% for the short-range, 98% for the medium-range, and more than 97% for the far-range. The image sizes for the same pedestrian are different as the position of him in the image, it is shown that the proposed algorithm can estimate the height of pedestrian for various position effectively.

2005년도 소아 서혜부 탈장치료 경향

김성민,김대연,김상윤,김성철,김우기,김재억,김재천,박귀원,서정민,송영택,오정탁,이남혁,이두선,전용순,정상영,정을삼,최금자,최순옥,한석주,허영수,홍정,최승훈,Kim, Seong-Min,Kim, Dae-Yeon,Kim, Sang-Yoon,Kim, Seong-Chul,Kim, Woo-Ki,Kim, Jae-Eok,Kim, Jae-Chun,Park, Kwi-Won 대한소아외과학회 2006 소아외과 Vol.12 No.2

Inguinal hernia is the most common disease treated by the pediatric surgeon. There are several controversial aspects of management 1)the optimal timing of surgical repair, especially for preterm babies, 2)contralateral groin exploration during repair of a clinically unilateral hernia, 3)use of laparoscope in contralateral groin exploration, 4)timing of surgical repair of cord hydrocele, 5)perioperative pain control, 6)perioperative management of anemia. In this survey, we attempted to determine the approach of members of KAPS to these aspects of hernia treatment. A questionnaire by e-mail or FAX was sent to all members. The content of the questionnaire were adapted from the "American Academy of Pediatrics (AAP) Section on Surgery hernia survey revisited (J Pediatr Surg 40, 1009-1014, 2005)". For full-term male baby, most surgeons (85.7 %) perform an elective operation as soon as diagnosis was made. For reducible hernia found in ex-preterm infants already discharged from the neonatal intensive care unit (NICU), 76.2 % of surgeons performed an elective repair under general anesthesia (85.8 %). 42.9 % of the surgeons performed the repair just before discharge. For same-day surgery for the ex-premature baby, the opinion was evenly divided. For an inguinal hernia with a contralateral undescended testis in a preterm baby, 61.9 % of surgeons choose to 'wait and see' until 12 month of age. The most important consideration in deciding the timing of surgery of inguinal hernia in preterm baby was the existence of bronchopulmonary dysplasia (82.4 %), episode of apnea/bradycardia on home monitoring (70.6 %). Most surgeons do not explore the contralateral groin during unilateral hernia repair. Laparoscope has not been tried. Most surgeons do not give perioperative analgesics or blood transfusion.

평판 가까이에 놓인 타원형 실린더 주위 유동에 관한 연구

김성민,이상준,Kim, Seong-Min,Lee, Sang-Jun 대한기계학회 1996 大韓機械學會論文集B Vol.20 No.8

Flow characteristics and aerodynamic forces acting on an elliptic cylinder placed in a plane boundary layer were investigated experimentally. Four cylinder models with axis ratio(major axis to minor axis, AR=A/B) of 1, 2, 3, and 4 having the same equivalent diameter were used in this experiment. The Reynolds number based on the equivalent diameter $D_e$(=20mm) was 13,000. In the case of circular cylinder, regular vortex shedding occurs for the cylinder gaps larger than G/B=0.3 and is not almost related to the boundary layer thickness. But, for the elliptic cylinders, the vortex shedding frequency is increased with increasing the gap ratio (G/B) and the axis ratio (AR) of elliptic cylinders. The maximum drag coefficient acting on a circular cylinder is mainly affected by the boundary layer thickness. But, the elliptic cylinders(AR$\geq$2), except for the smaller gap G/B<0.2, show a nearly constant drag coefficient which is much smaller than that of a circular cylinder. The base pressure on the flat plate decreases with increasing the axis ratio(AR) of the elliptic cylinder. In the case of a circular cylinder, the base pressure has the minimum value at the gap ratio G/B=0.4, but it occurs at G/D=2 for elliptic cylinders. The mean velocity of the cylinder wake is quickly recovered at a small cylinder height ratio(H/$\delta$), but the turbulent intensity is rapidly recovered at a large cylinder height ratio(H/$\delta$). The effective wake region in the plane boundary layer is shrinkaged with increasing the axis ratio(AR) of elliptic cylinder. And the drag coefficient and streamwise turbulent intensity of the elliptic cylinder with AR=4 are less than half of those for the circular cylinder(AR=1).

남강댐유역 내 주요 하천관측지점의 홍수유출량 추정을 위한 단위도 모형 비교연구

김성민,김성재,김상민,Kim, Sung-Min,Kim, Sung-Jae,Kim, Sang-Min 한국농공학회 2012 한국농공학회논문집 Vol.54 No.3

In this study, three different unit hydrograph methods (NRCS, Snyder and Clark) in the HEC-HMS were compared to find better fit with the observed data in the Namgang-Dam watershed. The Sancheong, Shinan, and Changchon in Namgang-Dam watershed were selected as the study watersheds. The input data for HEC-HMS were calculated land use, digital elevation map, stream, and watershed map provided by WAter Management Information System (WAMIS). Sixty six storms from 2004 to 2011 were selected for model calibration and validation. Three unit hydrograph methods were compared with the observed data in terms of simulated runoff volume, and peak runoff for the selected storms. The results showed that the coefficient of determination ($R^2$) for the peak runoff was 0.8295~0.9999 and root mean square error (RMSE) was 0.029~0.086 mm/day for calibration stages. In the model validation, $R^2$ for the peak runoff was 0.9061~0.9916 and RMSE was 0.030~0.088 mm/day which were more accurate than calibrated data. Analysis of variance showed that there was no significant difference among the three unit hydrograph methods.

Why Do Korean Firms Pay Unequal Dividends Between Large and Small Shareholders ?

김성민,정진호 ( Sung Min Kim,Jin Ho Jeong ) 한국재무학회 1996 96년 추계 학술발표 논문집 Vol.- No.-

임원항의 지형특성을 고려한 지진해일 피난 수치모형 연구

김성민,심주열,조용식,Kim. Sung-Min,Sim. Joo-Yeol,Cho. Young-Sik 한국방재학회 2008 한국방재학회 학술발표대회논문집 Vol.2008 No.1

It is the best way that to make an inundation map and distribute it to inhabitants for the purpose of decreasing damage of tsunami. To make an inundation map, tsunami which broughthuge damage to Korea should be properly investigated and maximum inundation zonewas selected by simulating tsunami phenomenan. An inundation map must involve the location of shelters and evacuation routes. New evacuation simulation program connected evacuation simulation procedure and tsunami inundation procedure to get inhabitants` evacuation states in real-time.