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신기철(Kichul Shin),서상기(Sangki Seo),왕지남(G. N Wang),홍상현(SangHyun Hong),남중호(Joongho Nam) 대한산업공학회 2011 대한산업공학회 추계학술대회논문집 Vol.2011 No.11
생산의 최적화를 위해서 제조업에서는 자동화 설비를 구축하고 사용하고 있다. 사용되고 있다. 이러한 자동화 설비들은 PLC(Programmable Logical Controller)에 의해서 제어되고 있다. PLC의 신호입, 출력을 통해서 공정을 제어하고 이상 상황에 대해서 반응하여 움직인다. 공정의 운용이 새로운 제품에 따라서 1년에도 여러 번 변경이 되고 있다. 이에 따라서 PLC가 새로이 작성되는 상황에서 공정의 시퀀스를 체크하는 시뮬레이션이 많이 사용되고 있다. 하지만 PLC에서도 상당부분을 차지하고 있는 이상 및 안전 회로의 검증은 시운전 시에 간단하게 확인을 하는 차원에서 이루어지고 있다. 본 논문에서는 실제 시뮬레이션을 통한 이상 회로의 검증을 실시하게 되는 경우 이상 회로의 여러 형태에 따른 이상 회로를 분류하여 형태별 이상 회로 검증을 제안하고자 한다. 제안하는 분류 방법은 실제 자동차산업의 사례를 바탕으로 PLC에 다양한 형태로 정의 되어 있는 이상회로를 명확한 형태적 분류와 기능적인 분류를 통해 이상 회로에 대한 효과적인 검증을 실시하기 위한 기본적인 틀을 마련하여 PLC프로그램의 효과적인 검증 방법의 제시하고자 한다
신기철(Kichul Shin),박태수(Taesoo Park),박상철(Sang. C Park),왕지남(Gi. N Wang) (사)한국CDE학회 2011 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2011 No.1
As we move into the late 20th century the manufacturing system has been developed continuously with automatic system. In this process, PLC (programmable Logical Controller) program has also improved the proportion of process control. However, sometimes an error can be occured the obsolete equipment or PLC due to makes the signal in put / output in the process. Because of this, if an accident occurs between facilities the accident can cause a serious problem of the production process and personal injury. At present, PLC simulation is using a direct modifying way , that fix the problem after checking a problem through a test operation in the field, because it is giving a importance to check sequence, however this way has to waste much time and manpower. Therefore, the verification technology that check a sequence or a problem is needed in the PLC simulation of the future facility process for the loss reduction and the improvement of the program quality. The objective of this research is which propose the improvement way of PLC program. If the process system use a simulation modelling a problems of process based on actual cases in the field, the simulation result can use for checking the sequence or safety circuit before actual operating process, and also it can improve of PLC program quality.
부분기여도함수를 이용한 GDI 제품의 진동기여도 분석기법 연구
신기철(Kichul Shin),이상직(Sangjik Lee),윤준석(Junseok Yoon),이상권(Sangkwon Lee) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
This paper presents the method estimating the contribution of vibration sources in GDI powertrain components with a multiple input system. Partial coherence function (PCF) has used to identify the cause of a linear dependence indicated by an ordinary coherence function. In order to apply the PCF to the vibration source identification in power train system of a GDI gasoline engine, the virtual model of two inputs and single output system is simulated. For the validation of this model, the vibration of powertrain components was measured by using tri-axial accelerometers attached on the selected vibration sources, which are high pressure pump, fuel rail, injector and pressure sensor. After calculating the partial coherence between each source based on the virtual model, the vibration contribution of powertrain system is calculated. This virtual model based on PCF is implemented to determine the quantitative vibration contribution of each powertrain components.
신기철(Shin Kichul),이승훈(Lee Seunghoon),권재영(Kwon Jaeyoung),장현국(Jang Hyunkook),이희연(Lee Heeyoun) 한국HCI학회 2019 한국HCI학회 학술대회 Vol.2019 No.2
이번 연구는 영상인식과 립모션을 활용하여 농인들의 언어인 수어를 한국어로 번역하여 출력하였습니다. 영상인식을 활용함으로써 사용자의 접근성을 높였고, 립모션을 사용하여 손동작 인식의 정확도를 높였습니다. 뿐만 아니라 기존의 한국어 형태소만을 번역하는 원론적인 번역이 아닌 실제로 농인들의 일상생활에서 자주 쓰이는 수화동작들을 추출하여 번역함으로써 실제 생활에서 사용할 수 있는 실용적인 번역 시스템을 구축하였습니다.
증례 : 호흡기 ; 폐 결절로 오인된 폐내 림프절의 Kikuchi병 1예
김진수 ( Jin Su Kim ),신동엽 ( Dong Yeop Shin ),김철현 ( Cheol Hyeon Kim ),김은경 ( Eun Kyoung Kim ),신기철 ( Kichul Shin ),강문철 ( Moon Chul Kang ),이승숙 ( Seung Sook Lee ) 대한내과학회 2015 대한내과학회지 Vol.89 No.2
Kikuchi-Fujimoto disease (KFD), also known as histiocytic necrotizing lymphadenitis, is an uncommon idiopathic, self-limiting disease characterized by cervical lymphadenopathy. Patients with KFD may present with a wide variety of nonspecific symptoms, including fever, night sweats, and weight loss. Although KFD can affect all lymph nodes of the body, involvement of the intrathoracic lymph nodes is relatively rare. In particular, isolated involvement of the intrapulmonary lymph nodes is extremely unusual. We herein report a case involving a 45-year-old man who presented with symptoms of myalgia, fatigue, and fever. Computed tomography performed during follow-up showed a slowly growing nodule in the upper lobe of the left lung. Results of laboratory tests did not reveal any evidence of infection or autoimmune disease, including systemic lupus erythematosus. Results of excisional biopsy by video-assisted thoracoscopic surgery revealed KFD in an intrapulmonary lymph node. His symptoms improved after a trial of nonsteroidal anti-inflammatory drugs. (Korean J Med 2015,89:220-224)
중추신경병증이 발생한 류마티스관절염 환자에서 발견된 악성빈혈 1예
이재명 ( Jae Myung Lee ),채지원 ( Jee Won Chai ),신기철 ( Kichul Shin ) 대한류마티스학회 2015 대한류마티스학회지 Vol.22 No.5
류마티스관절염과 골수형성이상증후군을 진단받은 환자에서 관절염 치료에도 불구하고 악화되는 사지위약감과 감각저하로 내원, 결국 악성빈혈과 이에 기인한 척수의 아급성연합변성을 진단하여 비타민 B12 투여 뒤 증상이 호전된 증례를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Pernicious anemia (PA) is an autoimmune disease characterized by atrophic gastritis and deficiency in intrinsic factor leading to impairment of vitamin B12 absorption in the ileum. Anemia is commonly found in rheumatoid arthritis (RA); however, PA is rarely found in RA. There are few reports describing patients with both conditions; none in Korea to date. We report on a case of a 46-year-old female who presented with hypesthesia and general weakness. She was previously diagnosed as seropositive RA with myelodysplastic syndrome. She had severely impaired sensation, especially for vibration and proprioception in all limbs. Subacute combined degeneration was observed on her magnetic resonance imaging and serum vitamin B12 level was very low. Further exam results were consistent with PA and her symptoms improved with cobalamin injection. This case demonstrates that PA should be considered in RA patients presenting with both central nervous system manifestations and anemia. (J Rheum Dis 2015;22:327-331)
독거 취약층 통풍 환자들의 요산강하 요법 치료지속성 연구
장유미 ( Yu Mi Jang ),김민정 ( Min Jung Kim ),유보림 ( Borim Ryu ),선지유 ( Ji Yu Sun ),문기원 ( Ki Won Moon ),신기철 ( Kichul Shin ) 대한내과학회 2023 대한내과학회지 Vol.98 No.3
Background/Aims: Irrespective of socioeconomic status, urate lowering therapy (ULT) is crucial for all chronic gout patients. We investigated the presence of missed opportunities for ULT among underprivileged patients treated at a major public hospital in Korea after a severe gout flare. Methods: We first collected information on patients admitted under the diagnosis of gout (International Classification of Diseases 10th Revision code M10) at a major public hospital from March 2011 to February 2022. De-identified patient data, including sociodemographic status, uric acid levels, list of medications, and outpatient follow-up data, were extracted. The patients were grouped into frail patients, who were living alone and were admitted to the specialized ward (SPE), and those who were admitted to the general ward (GEN). Primary endpoints were the outpatient visit rate immediately after discharge and the rate of ULT maintenance after a year. Results: Acute gouty arthritis was the chief event during admission in 136 cases. The mean (± standard deviation) age was 60.1 (± 16.1) years, and 95% of the patients were male. Only 18% of the patients were on ULT before admission. The patients were divided into the SPE (n = 25) and GEN (n = 111) groups. Body mass index in the SPE group was lower than in the GEN group (23.4 [± 4.4] and 25.1 [± 3.7], respectively, p = 0.082). The uric acid levels at admissio in the SPE and GEN groups were 9.6 (± 2.7) and 7.6 (± 2.3), respectively (p = 0.0023). After discharge, 80% and 95.5% of the SPE and GEN group participants presented to the outpatient department within 1 month, respectively (p = 0.019). ULT was continued or initiated in 85% of the patients. However, fewer patients continued colchicine for at least 3 months in the SPE group compared to the GEN group (25.0% and 43.4%, respectively). After 1 year, the SPE group had a higher rate of loss to follow-up (32.0% vs. 23.4%), higher uric acid levels (7.4 [± 3.8] vs. 6.2 [± 2.1]), and fewer ULT users (41.2% vs. 50.6%) compared to the GEN group, but the differences were not statistically significant. Conclusions: Frail patients who lived alone, even in the metropolitan area, missed opportunities for ULT and long-term gout care. Joint efforts on the part of health authorities and social workers are necessary to devise a strategy for better access and management among underprivileged gout patients. (Korean J Med 2023;98:137-143)