파산시기 변동성을 고려한 차등예금보험료 산출모형

조성욱 예금보험공사 2008 金融安定硏究 Vol.9 No.1

The current deposit insurance system in Korea does not reflect financial risks of insured financial institutions as they pay the same fixed rate regardless of their default risk. While previous studies such as Merton (1977)’s model recognize the different risks of insured, they assume that insurance corporations can intervene only on the final date of the period. Such an unrealistic assumption results from their theoretical base of European options. Applying an analytical solution for the put back options developed in Lee and Joh(2007), this paper derives a solution for risk-based deposit insurance premiums when default can happen any time and a deposit corporation can intervene immediately. As the insured get more benefits with more discretion regarding the choice of when to call the insurance to intervene, it can pay a higher premium. Based on the solution, this study demonstrates how interest rate, volatility of assets, duration and upper limits of insurance affect the premium. 본 연구는 기존 예금보험료 모형의 단점을 보완하여 개별금융기관의 파산위험성을 반영할 뿐만 아니라 금융기관의 파산시기와 예금보험의 개입시기를 모형의 기말로 고정하지 않고 변동할 수 있는 예금보험료 모형을 도출하고자 한다. 본 연구는 이종룡·조성욱(2007)의 풋백옵션 가치산정 모형에 기초하여 금융기관의 자산가치가 예금가치보다 작을 때 금융기관의 자산을 예금보험에 주고 보장된 예금가치를 얻을 수 있는 옵션가치로부터 예금보험의 가치와 예금보험료를 도출한다. 파산시기의 변동성을 고려한 모형과 파산시기의 변동성을 허용하지 않은 경우 각각 도출한 예금보험요율이 이자율, 금융기관 자산의 변동성, 보험기간 등이 변화함에 따라 어떻게 변화하는 지를 비교 분석한다.

ROS/Gazebo를 활용한 객체지향성 기반 PX4 무인항공기 시뮬레이션 소프트웨어 체계화 연구

조성욱 청주대학교 산업과학연구소 2025 산업과학연구 Vol.42 No.2

This paper presents a methodology for performing external/internal control of drones using ROS(robot operating system)/Gazebo simulations, applying object-oriented principles to systematize the entire software into a framework. To achieve this, the proposed method specifies waypoint information in advance through a JSON file, transmits it during the drone's boot phase, and automatically executes it starting from the takeoff stage, structured as an object-oriented module. The entire functionality is implemented using ROS's MAVROS(micro air vehicle ROS) library, overcoming the limitations of traditional example codes that rely on procedural approaches tailored to specific scenarios. The validity of the developed framework was verified by applying it to ROS/Gazebo simulations. This functionality is expected to contribute to simplifying the operation of complex flight scenarios required for offboard mode in the future.

분무열분해 공정을 이용한 CaMgSi₂O₆:Eu 청색 형광체 제조 및 VUV 발광특성

조성욱,정경열,정하균 한국공업화학회 2004 한국공업화학회 연구논문 초록집 Vol.2004 No.1

한국 자동차 부품공업의 연계 패턴에 관한 연구 : 공업 구조적 특성을 중심으로

조성욱 서울대학교 지리교육과 1987 地理敎育論集 Vol.18 No.1

This study examines forward and backward linkage patterns in the automobile part and component industry in Korea in particular, the study analizes linkage patterns for independent single-plant firms and multi-plant corporations. Most of the automobile part and component manufacturing firms are single-plant firms (independent firms) and are concentrated in areas of Seoul, Gyeong Gi Do, Pusan city and Daegu city. The head-quarters of multi-plant corporations are clustered in the Seoul Metropolitan region, more especially in the city of Seoul. In contrast, the branch plants of these multi-plant firms are distributed largely in Gyeong Nam and Gyeong Gi Do, which are less industrialized. The firms whose head-quarters are located in Seoul have a linkage pattern on a nation-wide scale, while those firms having head-quarters in other areas have developed the linkage pattern within the region where the head-quarters is located. The decentralization of branch-plants of Seoul-based-corporations has occured as a result of governmental efforts to disperse industrial facilities outside the city of Seoul. Firms whose head-quarters are in regions other than in Seoul usually establish their regional offices in Seoul to improve information linkage, namely face-to-face contact and tele-comunication contact. In the Linkage analysis the nation is divided into three regions: the Seoul Metropolitan region, the Young-Nam region and the Ho-Nam region. Backward linkages in each region occur largely within the region, while forward linkages have interactions outside the region. Among the three regions, the Young-Nam region is the highest in the ratio of self-dependent in material supply within its own region. One of the major reasons for this high self-dependence in the Young-Nam region is that the major iron and steel industries and metal fabricated industries in the nation are located in the region. The Ho-Nam region, by contrast, has to be dependent on other regions for the supply of material because of its lack of related industries. This region is further lacking in skilled labor and in well-established information linkage because the region is located outside the major industrial axis in Korea. The result of stepwise discriminant analysis is conducted to examine the linkage patterns which occur within the region and outside the region. The result indicates that the structure of the firm is the major variable contributing to distinguish the linkage pattern within the own region and outside the region. This fact implies that structure of the firm exerts more influence on the forward linkage patterns than on the backward Linkage. A case study has been conducted to examine the decision making processes in forward-backward linkage patterns. One of the major multi-plant firms among the automobile manufactury firms was selected. This firm has its head-quarters in Seoul and its branch plants in Gyeong Gi Do(Yong-in) and Gyeong Gi Do(Si-heung). Decisions on the forward linkages are largely made by the headquarters, and decisions on the backward linkages are made by the local plant. Each separate branch plant is not directly inter-dependent at plant level, but is highly inter-related to head-quarters. A major plant shortcoming of this study is that it failed to incorporate dynamic aspects of the process in the formation of linkage patterns.

무인항공기의 영상기반 도로검출, 추적 및 궤적추종 비행실험

조성욱,허성식,정연득,심현철 한국항공우주학회 2012 한국항공우주학회 학술발표회 논문집 Vol.2012 No.11

본 논문에서는 무인항공기의 도로인식 및 추적을 위한 영상처리 알고리듬과 기존의 시선각 기반 횡방향 유도제어기법을 변형한 영상기반 궤적추종 유도제어기법을 제안하고 비행실험을 통해 그 성능을 검증하였다. 제안된 영상처리 알고리듬은 공간영역뿐만 아니라 주파수영역에서의 에지 성분을 검출하는 다중 에지 검출기를 통해 기존의 알고리듬보다 향상된 에지 검출 성능을 가지며 확률적 허프변환을 사용한 직선검출기법과 주성분 분석법 및 RANSAC 을 적용한 최소자승법 기반 직선모델링을 통해 기존의 단일 허프변환 직선검출기에 비해 강건한 직선정보 검출성능을 보여준다. 본 논문에서는 비행실험 중획득한 영상을 이용하여 영상처리 알고리듬의 성능을 검증했을 뿐만 아니라 실시간 영상처리를 포함하는 영상기반 횡방향 유도제어 비행실험을 통해 제안된 알고리듬의 성능을 검증하였다. This paper proposes an image processing algorithm for road detection and tracking integrated with a vision-based lateral guidance law for linear path following. Proposed image processing algorithm performs edge detection substantially better than standard method because it utilizes a multi-domain edge detector that detects edge components in spatial domain as well as frequency domain. Furthermore, it shows a better and robust line detection performance than standard Hough transform because it consists of two sub algorithms: Hough transform with progressive probabilistic approach(PPA) and line regression with random sample consensus(RANSAC) and weight update based on the principal axis analysis(PCA). The performance of proposed algorithm is validated by post image processing using video clip taken from flight test and actual flight test.

국소 진행성 결장암에서의 인접장기 절제의 효과

조성욱,이령아,정순섭,김광호 대한대장항문학회 2009 Annals of Coloproctolgy Vol.25 No.2

Purpose: In locally advanced adherent colon cancer surgery, a mutivisceral resection is known to reduce local recurrence and improve survival. Practically, the benefit of using this procedure may outweigh the risk of associated morbidity, but the procedure may not be performed uniformly. We reviewed the results of multivisceral resections for locally advanced colon cancer. Methods: From 2003 January to 2008 January, 476 colon cancer patients underwent surgery for locally advanced colon cancer in our hospital. Out of the 476 patients, 36 patients with pT3-pT4 who underwent any kind of adjacent organ resection other than a resection of the colon were reviewed retrospectively. Results: Out of the 36 patients, 22 were male and 14 were female, and the mean age was 63.44±13.26 yr. The sigmoid colon was the most common location for the primary lesion, followed by the ascending colon, the transverse colon, and the cecum. Invaded organs were the abdominal or pelvic wall in 5 patients, the visceral organs in 26 patients, the retroperitoneum in 2 patients. All patients received an en-bloc resection of the invaded organs. Ten patients were stage II, 14 patients were stage III, and 12 patients were stage IV. Fifteen patients were disease free at the end of this study, local recurrence had occurred in 1 patient, 6 patients had an intraabdominal recurrence, and 2 patients had developed a distant metastasis. The overall complication rate was 28%. The 5-yr survival rate of each stage according to the surgical approach did not show any meaningful difference. Conclusion: A multivisceral en-bloc resection has been recommended for locally advanced adherent colon cancer patients. To improve the outcome, we suggest progressive surgical treatment in such patients. Purpose: In locally advanced adherent colon cancer surgery, a mutivisceral resection is known to reduce local recurrence and improve survival. Practically, the benefit of using this procedure may outweigh the risk of associated morbidity, but the procedure may not be performed uniformly. We reviewed the results of multivisceral resections for locally advanced colon cancer. Methods: From 2003 January to 2008 January, 476 colon cancer patients underwent surgery for locally advanced colon cancer in our hospital. Out of the 476 patients, 36 patients with pT3-pT4 who underwent any kind of adjacent organ resection other than a resection of the colon were reviewed retrospectively. Results: Out of the 36 patients, 22 were male and 14 were female, and the mean age was 63.44±13.26 yr. The sigmoid colon was the most common location for the primary lesion, followed by the ascending colon, the transverse colon, and the cecum. Invaded organs were the abdominal or pelvic wall in 5 patients, the visceral organs in 26 patients, the retroperitoneum in 2 patients. All patients received an en-bloc resection of the invaded organs. Ten patients were stage II, 14 patients were stage III, and 12 patients were stage IV. Fifteen patients were disease free at the end of this study, local recurrence had occurred in 1 patient, 6 patients had an intraabdominal recurrence, and 2 patients had developed a distant metastasis. The overall complication rate was 28%. The 5-yr survival rate of each stage according to the surgical approach did not show any meaningful difference. Conclusion: A multivisceral en-bloc resection has been recommended for locally advanced adherent colon cancer patients. To improve the outcome, we suggest progressive surgical treatment in such patients.

Studies on viscous behaviors of polyurethane prepolymer according to temperature conditions in 80 ℓ scale automatic processing pilot reactor

조성욱,조항규,노시태,강신춘 한국공업화학회 2002 한국공업화학회 연구논문 초록집 Vol.2002 No.0

To monitor and systematically control viscous behaviors of polyurethane (PU) prepolymer in the preparation of PU dispersion (PUD), 80L scale pilot reactor to which programmable logic control (PLC) was installed capable of operating each of process instruments, automatically using personal computer (PC) was built. In this pilot reactor, PU prepolymer was synthesized with polycarbonate diol (PCD), dimethylol propionic acid (DMPA), and isophorone diisocyanate (IPDI). The effect of temperature conditions, mixing efficiency, and recipe change on the viscous behaviors, molecular weight, and re-productivity of various property of PUD was in detail investigated.

(Ga,Al):ZnO 투명전극층의 스퍼터링 출력에 따른 CIGS 박막태양전지 성능 변화 연구

조성욱,전찬욱 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0

태양전지를 구성하는 투명전극은 태양광을 흡수층으로 전달하고 광생성 전자의 포집을 하는 데 중요한 역할을 한다. 본 연구에서는 250nm 두께의 GAZO (Ga,Al:ZnO) 박막을 DC 마그네트론 스퍼터링법으로 증착하였다. 스퍼터링으로 증착하는 경우 기판 표면은 이온과의 충돌로 인해 손상되므로 낮은 출력으로 증착하는 것이 표면 결함을 줄이는데 유리하다. 반면, 빠른 증착속도를 요구하는 양산에서는 높은 출력의 증착이 더 유리할 것이므로, 방전출력은 최적 조건을 갖게 된다. 스퍼터링 출력과 태양전지 성능 간의 영향을 파악하기 위하여 i-ZnO/ZnS/Cu(In,Ga)Se2/Mo/Glass 구조 위에 각각 100W, 150W, 200W, 250W, 300W의 출력으로 GAZO 250nm 증착한 소자를 제작하여 IV, CV, QE 등의 전기적 특성을 비교할 것이다.

(Ga,Al):ZnO, Al:ZnO 투명전극층이 Cu(In,Ga)Se₂ 박막 태양전지에 미치는 영향 비교

조성욱,전찬욱 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1

태양전지에 사용되는 투명 전극은 태양광을 흡수층으로 전달해야 하므로 높은 투과율이 요구되며, 직렬 저항을 감소시키기 위해 낮은 비저항을 가져야 한다. 본 연구에서는 400nm 두께의 (Ga,Al):ZnO (GAZO)와 Al:ZnO (AZO) 박막을 DC 마그네트론 스퍼터링법으로 증착하였다. 300-1,500nm 파장 영역에서 GAZO와 AZO의 투과율과 밴드갭을 분석하고, 홀 효과 측정을 통해 전기적 특성을 조사할 것이다. 또한, 각각의 투명전극층이 Cu(In,Ga)Se2 (CIGS) 박막 태양전지에 어떤 영향을 미치는지 확인하기 위해 i-ZnO/CdS/CIGS/Mo/Glass 구조 위에 GAZO 또는 AZO를 증착한 소자를 제작하여 소자 성능을 분석할 것이다.

Cu(In,Ga)Se₂ 박막 태양전지 모듈의 ZnO/Mo 계면 접촉저항 측정

조성욱,이경아,김아현,전찬욱 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-

Cu(In,Ga)Se₂(CIGS) 흡수층은 원소의 조성을 제어해 밴드갭 에너지를 조절할 수 있으며, 효율은 밴드갭 에너지가 약 1.2eV일 때 최적화되는 것으로 알려져 있다. 1.2eV의 밴드갭 에너지를 갖는 광흡수층을 이용한 태양전지는 개방전압(V_OC)이 0.7V이하로 제한되므로 태양전지를 직렬로 연결한 모듈을 제작하여 V_OC를 높힐 수 있다. CIGS 태양전지의 후면전극으로 주로 Mo가 사용되는데, CIGS/Mo 계면은 쇼트키 장벽이 만들어지는 것으로 알려져 있다. 반면 CIGS 흡수층을 만드는 과정에서 MoSe₂가 형성될 수 있고, 이는 CIGS/Mo 접합을 오믹접합이 되게 하므로 고효율 태양전지 제조를 위해 MoSe₂ 형성은 필수적이다. P2를 기계적 스크라이빙으로 형성하는 과정에서 MoSe₂를 제거하는 것은 어렵고, 투명전극층(Transparent conducting oxide, TCO)을 증착하면 P2 영역은 TCO/MoSe₂/Mo 접합이 만들어진다. 본 연구에서는 TCO로 B이 도핑된 ZnO를 사용하였으며, MoSe₂가 BZO/Mo 접합의 접촉저항에 미치는 영향을 조사하였다.