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악관절장애환자의 교합안정장치 장착 전후의 Pantronic PRI에 관한 비교연구
장만수,고석훈 단국대학교 치의학연구소 1991 논문집 Vol.3 No.-
This study was performed to diagnose the existence and the degree of TMJ dysfunction using Pantronic PRI and to investigate the degreeof dysfunction under treatment and to evaluate the period until dysfunction were disappeikared. For this study, 12 patients who had visited at the TMJ Clinic of Dnakook University were investigated with Pan-PRL, 8 exper imental group patients were treated with occlusal splint therapy and 4 control group patients were not altered of occlusion during this study. The results were as follows. 1. Occlusal splint therapy was effective on treatment of TMJ dysfunction. 2. in the slight dysfunction group, dysfunction was disappeared after 4-5 weeks since occlusal splint therapy was started. 3. Pan-PRI is useful to evaluate the existence of TMJ dysfunction, the degree of dysfunction results of treatment with occlusal splint therapy and to decide other occlusal treatment modalies.
Ko, Seok-Ku,Lee, Kwang-Man,Ko, luk-Hwan Korea Water Resources Association 1993 Korean journal of hydrosciences Vol.4 No.-
Selection of the best operating rule among a set of alternatives for a multipurpose reservoir system operation requires to evaluate many minor criteria in addition to the major objectives assessed to the system. These problems are sufficiently complex and difficult that they are beyond heuristic decision rules and experiences in case several noncommensurable multiple criteria are included in the evaluation. With the assistance of multicriterion decision analysis techniques, it is possible to select the best one among various alternatives by systematically comparing and ranking the alternatives with respect to the criteria of choice. Evaluation criteria for multipurpose reservoir system operating rules were identified and defined, and the multicriterion decision analysis techniques were applied to evaluate the four existing operating rules of the Chungju multipurpose project according to the identified nine multiple criteria. The application results show that the methodology is very efficient to select the best operation alternative among a finite number of operating rules with many evaluation criteria for a large-scale reservoir system operation.
Interference of Union after the Use of Beta-Tricalcium Phosphate Block in High Tibial Osteotomy
Man Seok Ko(고만석),Ju Seon Jeong(정주선),Dong Wook Jung(정동욱) 대한정형외과학회 2015 대한정형외과학회지 Vol.50 No.5
근위 경골 절골술은 최근 내반슬과 내측 구획 골관절염 치료에 흔히 시행되고 있는 치료 방법이다. 특히 열린 쐐기 근위 경골 절골술은 수술 술기가 쉽고, 신경과 혈관 손상이 적으며, 관절의 손상이 적어 자주 시행되고 있다. 열린 쐐기 근위 경골 절골술의 시행에 있어 골유합과 빈공간을 채우기 위하여 자가골 이식, 동종골 이식, 인산삼석회 같은 물질이 종종 쓰인다. 하지만 이 논문의 저자들은 인산삼석회 블럭을 이용한 근위경 골 절골술을 시행한 1년 후 발생한 불유합 2예를 경험하였기에 이를 문헌 고찰과 함께 보고하는 바이다. High tibial osteotomy (HTO) is a commonly used treatment for genu varum and medial compartment osteoarthritis. Recently open wedge HTO has been the preferred method due to its facilitated technique, fewer neurovascular and joint injuries, etc. In open wedge HTO materials such as autogenous, allogenous bone graft and tricalcium phosphate (TCP) are used to help with bone union and have a role in filling in the empty space. However the authors of this study report on two cases of nonunion 1 year after HTO using TCP block.
Man-Seok Son(손만석),Ho-Seung Jin(진호승),Dae-Seok Rho(노대석),Jae-Ha Ko(고재하) 대한전기학회 2020 대한전기학회 학술대회 논문집 Vol.2020 No.11
MVDC(Medium Voltage DC) distribution system has been on the rise for large transmission capacity with low energy loss, undersea power transmission, and so forth. Recently it has been a key part of renewable energy transmission in the smartgrid. However, in the process of the design and the implementation of the protection for the grid, engineers face the difficulties to find MVDC equipments, especially commercialized protection coordination devices, such as DC hybrid CB, solid state CB, VCB, ACB, MCCB, fuse, power contactors(CTR), etc. And those equipments have generally provided the narrow range of the DC rated voltage and the rated current and the power capacity, and given few types of the protective relay with narrow range. It gives a big restriction to design the protection elements and apply the equipments into the grid. This paper presents the protection coordination methods and prepares the actual application for 5kV MVDC grid with distributed generators(DG). The simulation and calculation have been done, the breakers and contactors are chosen, and the setting values of their protective relays and peripherals are found. Now those equipments are in the process of shipment. All of them will be built into the MVDC grid in the site of Naju in the 5kV grid and the ±35 kV grid.
LONG-TERM RESERVOIR SEDIMENT MANAGEMENT CONSIDERING OTHER OPERATIONAL OBJECTIVES
Ko, Seok-Ku,Kim, Woo-Gu,Lee, Gwang-Man Korea Water Resources Association 2002 물과 미래(한국수자원학회지) Vol.35 No.5
The Yellow River Basin located in the Northern part of China is well-known not only as the seriously limited water sources but the greatest sediment-carrying stream in the world. The observed annual average sediment concentration in this area is $37.6kg/\textrm{mm}^3$, and 3.1% of the water volume is occupied by sediments. Due to the reason, water development has been extremely limited and it has been appeared as one of the most difficult problems in reservoir development and management. The major obstacle to surface water uses is reservoir sedimentation so that it has been strongly requested to seek the method managing sediment by optimal fashion. To solve this problem, KOWACO (Korea Water Resources Corporation) has developed various methods on the optimal reservoir management schemes including sediment management for the Upper Fenhe Basin Reservoir System at the cooperation project with Chinese. Information Variable Dynamic Programming. which is one of them, was developed for the reservoir sediment management and a set of non-dominated solutions are generated to choose the best alternative in water supply and reservoir sediment objective problem.
LONG-TERM RESERVOIR SEDIMENT MANAGEMENT CONSIDERING OTHER OPERATIONAL OBJECTIVES
Seok-Ku,Ko Woo-Gu,Kim Gwang-Man,Lee 한국수자원학회 2002 한국수자원학회논문집 Vol.35 No.5
The Yellow River Basin located in the Northern part of China is well-known not only as the seriously limited water sources but the greatest sediment-carrying stream in the world. The observed annual average sediment concentration in this area is , and 3.1
Ko Seong Eun,Lee Min Woo,Ahn Soohyun,Rhim Hyunchul,Kang Tae Wook,Song Kyoung Doo,Kim Jong Man,Choi Gyu Seong,Cha Dong Ik,Min Ji Hye,Sinn Dong Hyun,Choi Moon Seok,Lim Hyo Keun 대한영상의학회 2022 Korean Journal of Radiology Vol.23 No.6
Objective: To compare the therapeutic outcomes of laparoscopic hepatic resection (LHR) and laparoscopic radiofrequency ablation (LRFA) for single subcapsular hepatocellular carcinoma (HCC). Materials and Methods: We screened 244 consecutive patients who had received either LHR or LRFA between January 2014 and December 2016. The feasibility of LRFA in patients who underwent LHR was retrospectively assessed by two interventional radiologists. Finally, 60 LRFA-feasible patients who had received LHR and 29 patients who had received LRFA as the first treatment for a solitary subcapsular HCC between 1 cm and 3 cm were finally included. We compared the therapeutic outcomes, including local tumor progression (LTP), recurrence-free survival (RFS), and overall survival (OS) between the two groups before and after propensity score (PS) matching. Multivariable Cox proportional hazard regression was also used to evaluate the difference in OS and RFS between the two groups for all 89 patients. Results: PS matching yielded 23 patients in each group. The cumulative LTP and OS rates were not significantly different between the LHR and LRFA groups after PS matching (p = 0.900 and 0.003, respectively). The 5-year LTP rates were 4.6% and 4.4%, respectively, and OS rates were 100% and 90.7%, respectively. The RFS rate was higher in LHR group without statistical significance (p = 0.070), with 5-year rates of 78.3% and 45.3%, respectively. OS was not significantly different between the LHR (reference) and LRFA groups in multivariable analyses, with a hazard ratio (HR) of 1.33 (95% confidence interval, 0.12–1.54) (p = 0.818). RFS was higher in LHR (reference) than in LRFA without statistical significance in multivariable analysis, with an HR of 2.01 (0.87–4.66) (p = 0.102). Conclusion: There was no significant difference in therapeutic outcomes between LHR and LRFA for single subcapsular HCCs measuring 1–3 cm. The difference in RFS should be further evaluated in a larger study.