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굴곡형 기관지경을 이용하여 치료한 기관지 내 과오종 2예
노재형 ( Jae Hyung Roh ),박태선 ( Tai Sun Park ),김선영 ( Sun Young Kim ),유정완 ( Jung Wan Yoo ),박경민 ( Gyung Min Park ),박성연 ( Seong Yeon Park ),최창민 ( Chang Min Choi ) 대한내과학회 2009 대한내과학회지 Vol.77 No.5
Hamartoma is the most common benign neoplasm occurring in the lung. By contrast, endobronchial hamartomas are rare and cause irreversible lung damage due to bronchial obstruction if not diagnosed early and treated properly. Of the various treatments for this rare disease, surgical resection and removal using rigid bronchoscopy remains the most popular; this requires general anesthesia and relatively more time to recover from the procedure. Here, we report the cases of a 50-year-old woman and 65-year-old man who presented with endobronchial hamartomas that were removed successfully using cryotherapy and electrocoagulation via a flexible bronchoscope. (Korean J Med 77:625-629, 2009)
정구형(Koo-Hyung Chung),노재형(Jae-Hyung Roh),조기선(Ki-Seon Cho),김학만(Hak-Man Kim) 대한전기학회 2010 전기학회논문지 P Vol.59 No.3
Although electricity market structures may be different from each country, they have a long-term forward market and a short-term spot market in general. Particularly, a bilateral contract transacted at a long-term forward market fixes the electricity price between a genco and a customer so that the customer can avoid risk due to price-spike in the spot market. The genco also can make an efficient risk-hedging strategy through the bilateral contract. In this paper, we propose a new mechanism for deriving the optimal bilateral contract price using game theory. This mechanism can make the customer reveal his true willingness to purchase so that an adequate bilateral contract price is derived.
면역글로불린 G4 연관 자가 면역 질환의 폐 침범 2예
유정완 ( Jung Wan Yoo ),노재형 ( Jae Hyung Roh ),임채만 ( Chae Man Lim ),이상도 ( Sang Do Lee ),김우성 ( Woo Sung Kim ),김동순 ( Dong Soon Kim ),송진우 ( Jin Woo Song ) 대한결핵 및 호흡기학회 2009 Tuberculosis and Respiratory Diseases Vol.67 No.4
Immunoglobulin G4 (IgG4) related autoimmune diseases are characterized by high serum IgG4 concentrations, sclerosing inflammation of numerous IgG4-positive lymphoplasma cells of varying origin, and a positive response to steroid treatment. Autoimmune pancreatitis, sclerosing cholangitis, and retroperitoneal fibrosis are representative presentations of IgG4 related autoimmune disease. Herein, we describe 2 patients (40-years-old woman and 47-years-old man) diagnosed with pulmonary involvement of IgG4-related autoimmune disease. The patients were admitted for an evaluation of the lung mass or multiple lung nodules found on chest radiography. Surgical lung biopsies were performed and pathologic finding revealed lymphoplasmacytic sclerosing inflammation with numerous IgG4 positive cells. The patients had elevated serum total IgG and IgG4 levels. Treatment consisted of high dose methylpredinisolone (1 mg/kg/day) and demonstrated good responsiveness. However, one patient experienced 2 relapses while being tapered off of steroid treatment.
북미 주파수조정예비력 시장 규칙의 우리나라 적용사례와 발전방안
박대현(Dael-Hyun Park),노재형(Jae-Hyung Roh),박종배(Jong-Bae Park),박용기(Yong-Gi Park) 대한전기학회 2020 전기학회논문지 Vol.69 No.4
Due to the FERC Order 755, the regulation market rules for the pricing and settlement process of North American ISO/RTO have changed. As per revision, resources that provide regulation have been become to receive an additional settlement for performance and mileage in addition to the compensation for reserve capacity according to each different market rules. This paper briefly reviews market rules, including pricing mechanisms and settlement rules of PJM and CAISO, in accordance with FERC order 755. Then, case studies are carried out for the case where the relevant rules are applied to domestic resources. The results of the case study include the merit order each resource, market price, and compensation amount and finally proposes the development direction of the domestic power market.
송형용(Hyoung-Yong Song),노재형(Jae-Hyung Roh),박종배(Jong-Bae Park),신중린(Joong-Rin Shin),채명석(Myung-Suk Chae) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
This paper present a new approach for optimal dispatch for energy and frequency control reserve considering contingency in the competitive electricity market. Ancillary service plays a key role in maintaining operation security of the power systems in a competitive electricity in power system. This paper proposes a methodology for optimal dispatch for frequency control reserve that satisfy all constraints such as equality and in-equality constraints for all possible contingencies of power system. The methodology are accomplished with the equality and in-equality constraints based on AC load flow. To verify the effectiveness of the proposed method, the numerical study has been performed for 5-bus sample system.
[전력경제] 우리나라 전력시장에서 수도권 열병합발전기의 송전혼잡완화 편익 산정 연구
박용기(Yong-Gi Park),노재형(Jae Hyung Roh),이두희(Duehee Lee),박종배(Jong-Bae Park) 대한전기학회 2019 전기학회논문지 Vol.68 No.5
The combined heat and power system (CHP) is one of the representative distributed energy resources which provide various benefits to the power system. This paper estimates the transmission congestion relief benefits from the CHPs located in the metropolitan area in Korea Electricity Market. Based on the results of the electricity market operation, we extract the transmission congestion relief contribution to the power system from CHPs’ excess generation due to the self-constraint. The calculated transmission congestion relief benefits are energy cost savings from the power system perspective and energy settlement cost savings from the utility perspective. The improved market settlement rules for the excess output due to the self-constraint are suggested, considering the transmission congestion relief contribution.
베체트병 포도막염 환자에서 Infliximab 사용 중 발생한 속립성 결핵
유정완 ( Jung Wan Yoo ),노재형 ( Jae Hyung Roh ),박진욱 ( Jin Wook Park ),김용균 ( Yong Giun Kim ),장지웅 ( Ji Woong Jang ),나수영 ( Soo Young Na ),심태선 ( Tae Sun Shim ) 대한결핵 및 호흡기학회 2009 Tuberculosis and Respiratory Diseases Vol.67 No.5
Infliximab, a TNF-α antagonist, has been used to treat refractory rheumatoid arthritis, ankylosing spondylitis, Crohn`s disease and Behcet`s disease. Tuberculosis (TB) is a well-known opportunistic infection in patients receiving infliximab. Therefore, patients should be screened and treated for latent or active TB infection before being administered infliximab. Recently, we encountered a case of military TB during infliximab therapy in a patient suffering from Behcet`s disease and uveitis. We report this case with a review of the relevant literature.
박용기(Yong-Gi Park),노재형(Jae-Hyung Roh),박종배(Jong-Bae Park),최면송(Myeon-Song Choi),김광원(Gwang-Won Kim),김주성(Ju-Seong Kim) 대한전기학회 2011 전기학회논문지 Vol.60 No.3
In the distribution systems, the maximum power transportation capacity is restricted within 40㎿ based on two lines, because of the thermal current limit of a distribution line. Recently it has been continuously required to expand the abilities of the power transportation in distribution systems, as the number of large scale industrial complexes and distributed generations are growing. In this paper, we suggested the five alternatives combining two methods, laying the two bundle lines and adding another voltage between the 22.9㎸ and 154㎸ in distribution systems. This paper implemented the economic evaluations of proposed alternatives from national and customer perspectives. And then we compare the results with those of 154㎸ transmission system.