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( Yoon Pyo Lee ),( Gil Ja Shin ),( Kwan Chang Kim ),( Yoo Kyung Kim ),( Sang Hui Park ) 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1
Background: Primary malignant pericardial mesothelioma is an extremely rare disease which originates primarily from pericardium. The disease`s symptoms are usually nonspecifi c, and few misdiagnosed cases as acute constrictive pericarditis or tuberculous pericarditis were reported. Case report: We present a case of 61-years-old male who visited our center with progressive dyspnea, and found to have massive pericardial effusion. Contrast-enhanced chest CT scan showed a well-defi ned heterogeneously enhancing mass posterior to the left atrium. As defi nite diagnosis couldn`t be made even with fl uid cytology of the patient`s pericardial effusion, patient underwent for surgical biopsy, and the diagnosis of primary pericardial mesothelioma was made with the specimen from video-assisted thoracoscopic mass excision surgery. Full excision was unavailable due to poor demarcation & high vascularity. Patient`s symptoms were relieved after the surgery, and he is under outpatient follow up. The CT fi ndings were rather distinctive, showing only well-defi ned mass without diffuse pericardial infi ltration. Considering these points, it can be deduced that primary pericardial mesothelioma may present in variable extent, infl uencing pathophysiology of the disease. Conclusion: Primary pericardial mesothelioma is rare cardiac tumor often presents with pericardial effusion. For defi nite diagnosis, patient often require surgical biopsy. The prognosis is poor, as still no treatment strategies were proven effective enough. When the etiology of pericardial effusion is uncertain, it is recommended to consider the possibility of this rare malignancy.
( Sang-hyuk Yoon ),( Jae-won Lee ),( Dongyeop Lee ),( Ji-heon Hong ),( Jae-ho Yu ),( Jin-seop Kim ),( Seong-gil Kim ) 대한물리치료학회 2021 대한물리치료학회지 Vol.33 No.6
Purpose: The purpose of this study is to confirm the effect of static stretching of the plantar flexor for 5 minutes on balance and ankle muscle activity when walking in young adults. Methods: This study experimented on 20 healthy college students without vestibular and musculoskeletal diseases. Subjects performed static stretching intervention of plantar flexor for 5 minutes on a stretch board set at 15° to 25° Balance was measured four times before intervention (pre), after intervention (post), 5 minutes after intervention (post 5 min), 10 minutes after intervention (post 10 min), and ankle muscle activity was measured during walking. For the analysis and post hoc analysis, one-way Repeated Measure ANOVA and Fisher’s LSD (Last Significant Difference) was performed to find out the change in balance and the activity of ankle muscles before static stretching, pre, post, post 5 minutes rest, post 10 minutes rest. Results: There was no significant difference in weight distribution index (WDI) in balance, but stability index (ST) showed a significant difference, and there was also a significant difference in correlation pre, post, post 5min rest, post 10 minutes rest (p< 0.05). There was no significant difference in ankle muscle activity during walking in Tibialis anterior (TA), Medial gastrocnemius (GM), and Lateral gastrocnemius (GL) (p >0.05). Conclusion: The stability index (ST) increased significantly immediately after static stretching and decreased after 5 minutes. After static stretching, at least 5 minutes of rest are required to restore balance.
A study of On-Machine Measurement for PC-NC system
Yoon, Gil-Sang,Kim, Gun-Hee,Cho, Myeong-Woo,Seo, Tae-Il Korean Society for Precision Engineering 2004 International Journal of Precision Engineering and Vol.5 No.1
The purpose of this paper is to establish an effective inspection system by using OMM (On-Machine Measurement) system based PC-NC. This system can reduce manufacturing lead time because a workpiece is inspected at every machining process and the manufacturing system which includes inspection faculty is able to realize on-line process on CNC machining center. The proposed OMM system is composed of a few algorithms for determination of inspection parameters. It is accomplished by determining the number of measuring points, their location, measuring path using fuzzy logic, Hammersley's method, TSP (Traveling Salesperson Problem) algorithm. The inspection feature applied to this system is based on machining feature. This method is tested by simulation and experiment that are analyzed measuring data and geometry tolerance.
A study of On-Machine Measurement for PC-NC system
Gil-Sang Yoon,Gun-Hee Kim,Myeong-Woo Cho,Tae-Il Seo 한국정밀공학회 2004 International Journal of Precision Engineering and Vol.5 No.1
The purpose of this paper is to establish an effective inspection system by using OMM (On-Machine Measurement) system based PC-NCo This system can reduce manufacturing lead time because a workpiece is inspected at every machining process and the manufacturing system which includes inspection faculty is able to realize on-line process on CNC machining center. The proposed OMM system is composed of a few algorithms for determination of inspection parameters. It is accomplished by determining the number of measuring points, their location, measuring path using fuzzy logic, Hammersley's method, TSP (Traveling Salesperson Problem) algorithm. The inspection feature applied to this system is based on machining feature. This method is tested by simulation and experiment that are analyzed measuring data and geometry tolerance.
Development of 3D-based On-Machine Measurement Operating System
Gil-Sang Yoon,Young-Moo Heo,Gun-Hee Kim,Myeong-Woo Cho 한국정밀공학회 2005 International Journal of Precision Engineering and Vol.6 No.3
This paper proposed an efficient manufacturing system using the OMM (on-machine measurement) system. The OMM system is software-based 3D modeler for inspection on machine, and it is interfaced with machine tools via RS232C. The software is composed of two inspection modules; one is touch probe operating module, and the other is laser displacement sensor operating module. The module for touch probe needs the inspection feature extracted from CAD data. The touch probe moves to workpiece by three operating modes as follows: manual, general and automatic mode. The operating module of the laser displacement sensor is used to inspect profiles and very small holes. An advantage of this inspection method is the ability to execute on-line inspection during machining or afterward. The efficiency of proposed system which can predict and define the machining errors of each process was verified, so the developed system was applied to inspect a mold-base (cavity, core).
Long-Term Outcomes of Liver Retransplantation: A 31-Year Korean Single-Center Experiences
( Sang-hoon Kim ),( Deok-bog Moon ),( Sung-gyu Lee ),( Shin Hwang ),( Chul-soo Ahn ),( Ki-hun Kim ),( Tae-yong Ha ),( Gi-won Song ),( Dong-hwan Jung ),( Gil-chun Park ),( Young-in Yoon ),( Woo-hyoung 대한간학회 2024 춘·추계 학술대회 (The Liver Week) Vol.2024 No.1