엘리트 레슬링선수들의 손상유형에 따른 시각적 상사 척도와 회복 기간과의 융복합분석

김준철,박기준,Kim, June-Chul,Park, Ki-Jun 한국융합학회 2020 한국융합학회논문지 Vol.11 No.9

본 연구는 엘리트 레슬링선수들이 주로 발생하는 스포츠 손상유형을 알아보고, 그에 따른 시각적 상사 척도와 회복 기간 그리고 시각적 상사 척도와 회복 기간이 어떠한 관계가 있는지 알아보고자 하였다. 손상 유형별 발생률은 포아송 비로 계산하였으며, 손상유형에 따른 시각적 상사 척도와 회복 기간은 일원분산분석을 시행하였다. 또한, 시각적 상사 척도와 회복 기간의 관계를 알아보기 위해 단순선형 회귀분석을 시행하였으며, 모든 통계의 유의성은 α=.05로 하였다. 연구결과 인대 손상이 가장 높았으며, 그다음으로는 근육 손상, 연골 손상 그리고 힘줄 손상 순이었다. 손상유형에 따른 시각적 상사 척도는 통계적으로 유의하였으며(p=.001), 회복 기간에서도 통계적으로 유의하였다(p=.001). 또한, 시각적 상사 척도가 1씩 증가할 경우, 회복 기간은 약 1.89일씩 길어졌다(p=.001). 이러한 연구들은 선수들의 안전한 선수 생활과 스포츠 현장 복귀를 위한 유용한 이론적 배경으로 제공될 것이다. This study was conducted to investigate the relation between visual analogue scale and recovery time with type of injury that occur in elite wrestling athletes. The incidence rate of injury was analyzed the Poisson ratio, and the VAS and recovery time according to the type of injury were compared using the one-way ANOVA. In addition, the VAS and recovery time were examine the relationship using the Simple Linear Regression, and statistical significance level was α =.05. Injuries occurred most commonly in the ligament, followed by the muscle, cartilage and tendon.The VAS and recovery time according to the type of injury was statistically significant (p=.001, p=.001, respectively). The VAS and recovery time according to the type of injury was statistically significant (p=.001, p=.001). Also, increase in VAS of 1 point was associated with about 1.89 recovery time. These studies are expected to be useful as basic data for return to sports and safe training.

잡음과 회전에 강인한 SIFT 기반 PCB 영상 정렬 알고리즘 개발

김준철(Jun-Chul Kim),최학남(Xue-nan Cui),박은수(Eun-Soo Park),최효훈(Hyo-hoon Choi),김학일(Hakil Kim) 제어로봇시스템학회 2010 제어·로봇·시스템학회 논문지 Vol.16 No.7

This paper presents an image alignment algorithm for application of AOI (Automatic Optical Inspection) based on SIFT. Since the correspondences result using SIFT descriptor have many wrong points for aligning, this paper modified and classified those points by five measures called the CCFMR (Cascade Classifier for False Matching Reduction) After reduced the false matching, rotation and translation are estimated by point selection method. Experimental results show that the proposed method has fewer fail matching in comparison to commercial software MIL 8.0, and specially, less than twice with the well-controlled environment’s data sets (such as AOI system). The rotation and translation accuracy is robust than MIL in the noise data sets, but the errors are higher than in a rotation variation data sets although that also meaningful result in the practical system. In addition to, the computational time consumed by the proposed method is four times shorter than that by MIL which increases linearly according to noise.

CPU와 GPU의 병렬 처리를 이용한 고속 물체 인식 알고리즘 구현

김준철(Jun-Chul Kim),정용한(Young-Han Jung),박은수(Eun-Soo Park),최학남(Xuenan Cui),김학일(Hak-Il Kim),허욱렬(Uk-Youl Huh) 제어로봇시스템학회 2009 제어·로봇·시스템학회 논문지 Vol.15 No.5

This paper presents a fast feature extraction method for autonomous mobile robots utilizing parallel processing and based on OpenMP, SSE (Streaming SIMD Extension) and CUDA programming. In the first step on CPU version, the algorithms and codes are optimized and then implemented by parallel processing. The parallel algorithms are debugged to maintain the same level of performance and the process for extracting key points and obtaining dominant orientation with respect to key points is parallelized. After extraction, a parallel descriptor via SSE instructions is constructed. And the GPU version also implemented by parallel processing using CUDA based on the SIFT. The GPU-Parallel descriptor achieves an acceleration up to five times compared with the CPU-Parallel descriptor, but it shows the lower performance than CPU version. CPU version also speed-up the four and halftimes compared with the original SIFT while maintaining robust performance.

활동성 불연속면을 포함한 사질토 지반에서 상재하중에 의한 수평토압

김준철(Kim Jun-Chul),정경범(Joeng Guyng-Bum),김상희(Kim Sang-Hee),이상덕(Lee Sang-Duk) 대한토목학회 2004 대한토목학회 학술대회 Vol.2004 No.10

기관 및 주기관지에서 발생한 기관지기형의 임상적 고찰

김준철 ( Jun Chul Kim ),김연재 ( Yeon Jae Kim ),강병준 ( Byung Jun Kang ),윤영득 ( Young Deuk Youn ),이세영 ( Se Young Lee ),권영란 ( Young Lan Kwon ),이수옥 ( Soo Ok Lee ),정치영 ( Chi Yeong Jeong ),이병기 ( Byung Ki Lee ) 대한결핵 및 호흡기학회 2005 Tuberculosis and Respiratory Diseases Vol.59 No.6

쇄석의 압축성에 관한 연구

김준철(Kim Jun Chul),김상희(Kim Sang Hee),변광욱(Byun Kwang Wook),이상덕(Lee Sang Duk) 대한토목학회 2003 대한토목학회 학술대회 Vol.2003 No.10

증례 : 신장 ; 말기신부전 환자에서 발견된 국소적 총장골동맥류

최혁준 ( Hyuk Joon Choi ),김준철 ( Jun Chul Kim ),김종열 ( Jong Yeol Kim ),김동훈 ( Dong Hoon Kim ),서안나 ( An Na Seo ),김덕실 ( Duck Sil Kim ),김성완 ( Sung Wan Kim ) 대한내과학회 2011 대한내과학회지 Vol.80 No.5

복부 대동맥류를 동반하지 않고 장골동맥에만 국소적으로 발생하는 동맥류는 매우 드문 질환이며, 이러한 국소적 장골동맥류의 원인으로는 죽상동맥경화증, 감염, 외상, 중막 변성 등이 있다. 해부학적으로 골반 내에 위치하기 때문에 쉽게 촉지되지 않으며 무증상인 경우가 많아서 대부분의 동맥류는 영상의학검사 등에서 우연히 발견되는 경우가 많으며, 조기 진단이 힘들어 파열의 위험성을 가지고 있다. 만성 신부전 환자들은 동맥경화증을 가지는 경우가 많으며, 투석을 위한 응급혈관통로 시술을 필요로 할 수 있어, 동맥류가 있을 경우, 파열의 위험에 노출되어 있어 주의를 필요로 한다. 저자들은 요독증상으로 내원하여 만성 신부전 진단 후 혈액투석을 시작한 환자에서 우연히 발견된 국소적 총장골동맥류를 경험하였기에 이를 문헌고찰과 함께 보고하는 바이다. An isolated aneurysm of the iliac artery is a very rare disease that can occur as the result of atherosclerotic degeneration, mycosis, trauma, medial necrosis, fibrodysplasia, or Marfan syndrome. This abnormality is often asymptomatic, and it has a potential risk of rupture. Since patients with chronic renal failure on hemodialysis have many comorbid conditions, the risk of rupture is increased. Here, we report the case of an isolated common iliac artery aneurysm that was caused by atherosclerosis in a patient on hemodialysis, and we review the relevant literature.

컴퓨터화 된 요소 역동학 모델 ( Urea Kinetic Modeling ) 을 이용한 지속성 외래 복막투석 환자의 투석용량에 따른 투석적절도 연구

김용림(Yong Lim Kim),김준철(Jun Chul Kim),김찬덕(Chan Duck Kim),김준홍(Jun Hong Kim),조동규(Dong Kyu Cho) 대한내과학회 1999 대한내과학회지 Vol.57 No.3

N/A The DOQI guidelines recommend that the delivered PD dose should be a total weekly Kt/Vurea and Ccr values of at least 2.0 and 60 L/week/1.73 m2 for CAPD patients. To achieve these recommended guidelines, the standard regime of four 2-L daily exchanges may not be sufficient even for Oriental patients whose body size are relatively smaller than those of Westerners. However, the option of a two-and-a-half liter bag (2.5L) and a simple automated overnight exchange device for a fifth exchange are not available in some countries. In order to evaluate the percentage of CAPD patients who receive dialysis meeting DOQI guidelines in different dialysis prescriptions, 110 Korean patients, treated for over a 3 month on CAPD, with a mean age of 46.912.6 years and dialysis duration of 37.6±28.1 months (range 3-116), were studied. Methods : Baseline urea kinetic data from a 24-hour dialysate collection was obtained and analyzed using the computerized urea kinetic model of peritoneal urea transport (PACK-PD, vers 1.01, Fresenius). The potential Kt/Vurea and Ccr values using four 2L and 2.5L daily exchanges were calculated with the PC program. Results : The mean weekly Kt/Vurea and Ccr values were 2.01±0.67 and 66.4±29.6 L/week/1.73 m2 respectively, with a median body surface area (BSA) of 1.61 m2 (75th percentile 1.73 m2). The mean 24 hour dialysate-to-plasma creatinine ratio was 0.75±0.16. Fourty-five of the 110 patients (41%) had no residual renal function. Upon logistic regression analysis, Kt/Vurea was independent factor affecting serum albumin and NPCR. 1) In forty-eight (44%) of the 110 patients, both Kt/Vurea and Ccr values with four 2-L daily exchanges were adequate. In twenty-two (20%), one of Kt/Vurea and Ccr values with four 2-L daily exchanges was inadequate. In fourty (36%), both Kt/Vurea and Ccr values with four 2-L daily exchanges were inadequate. 2) In eighty-four (77%) of the 110 patients, both Kt/Vurea and Ccr values with four 2.5-L daily exchanges were adequate. In nineteen (17%), one of Kt/Vurea and Ccr values with four 2.5-L daily exchanges was inadequate. In seven (6%), both Kt/Vurea and Ccr values with four 2.5-L daily exchanges were inadequate. 3) In three (7%) of the fourty-five anuric patients, both Kt/Vurea and Ccr values with four 2-L daily exchanges were adequate. In eleven (24%), one of Kt/Vurea and Ccr values with four 2-L daily exchanges was inadequate. In thirty-one (69%), both Kt/Vurea and Ccr values with four 2-L daily exchanges were inadequate. 4) In twenty-seven (60%) of the fourty-five anuric patients, both Kt/Vurea and Ccr values with four 2.5-L daily exchanges were adequate. In thirteen (29%), one of Kt/Vurea and Ccr values with four 2.5-L daily exchanges was inadequate. In five (11%), both Kt/Vurea and Ccr values with four 2.5-L daily exchanges were inadequate. Conclusion : The anuric Korean patients may need four 2.5L daily exchanges for acceptable adequacy target. Special attention must be given to those patients with no residual renal function. (Korean J Med 57:313-322, 1999)

LTCC 기술을 적용한 집적화된 2.4 ㎓ 대역 무선 송수신 모듈 구현

김동호(Dong-Ho Kim),김동수(Dongsu Kim),유종인(Jong-In Ryu),김준철(Jun-Chul Kim),박종대(Chong-Dae Park),박종철(Jong-Chul Park) 한국전자파학회 2011 한국전자파학회논문지 Vol.22 No.2

본 논문에서는 저온 동시 소성 세라믹(Low Temperature Co-fired Ceramic: LTCC) 기술을 이용하여 집적화된 2.4 ㎓ 대역 무선 송수신 모듈을 구현하였다. 구현된 송수신 모듈은 무선 전단부(RF front-end)단과 송수신 IC 칩 단으로 나누어진다. 무선 전단부단은 송수신을 선택하기 위한 SPDT 스위치와 스위치 동작을 위한 DC block 커패시터를 제외하고, 모두 LTCC 내부에 내장하였다. 제작된 무선 전단부는 8층으로 설계되었고, 크기는 3.3 ㎜×5.2 ㎜×0.4 ㎜이며, 무선 전단부의 측정 결과는 시뮬레이션과 유사한 결과를 보인다. 송수신 IC 칩 단은 신호 및 전원 선로와 송수신 IC 칩으로 구성이 되어 있다. 제작된 무선 송수신 모듈은 내부 접지(inner GND) 3개 층을 포함한 9층으로 설계되었으며, 크기는 12 ㎜×8.0 ㎜×1.1 ㎜이다. 최종적으로 2.4 ㎓ 대역 송수신 모듈의 송신 파워는 18.1 ㏈m이고, 수신 민감도는 ?85 ㏈m의 특성으로 우수한 결과를 나타내었다. This paper presents a compact integrated transceiver module for 2.4 ㎓ band applications using Low Temperature Co-fired Ceramic(LTCC) technology. The implemented transceiver module is divided into an RF Front-End Module (FEM) part and a transceiver IC chip part. The RF FEM part except an SPDT switch and DC block capacitors is fully embedded in the LTCC substrate. The fabricated RF FEM has 8 pattern layers and it occupies less than 3.3 ㎜×5.2 ㎜×0.4 ㎜. The measured results of the implemented RF FEM are in good agreement with the simulated results. The transceiver IC chip part consists of signal line, power line and transceiver IC for 2.4 ㎓ band communication system. The fabricated transceiver module has 9 layers including three inner grounds and it occupies less than 12 ㎜×8.0 ㎜×1.1 ㎜. The implemented transceiver module provides an output power of 18.1 ㏈m and a sensitivity of ?85 ㏈m.

기생 성분을 고려한 Wi-Fi와 WiMAX용 LTCC 무선 전단부 모듈의 구현

김동호(Dong-Ho Kim),백경훈(Gyung-Hoon Baek),김동수(Dongsu Kim),유종인(Jong-In Ryu),김준철(Jun-Chul Kim),박종철(Jong-Chul Park),박종대(Chong-Dae Park) 한국전자파학회 2010 한국전자파학회논문지 Vol.21 No.4

본 논문에서는 저온 동시 소성 세라믹(Low Temperature Co-fired Ceramic: LTCC) 기술을 이용하여 Wi-Fi와 WiMAX에 적용할 수 있는 무선 전단부(RF front-end) 모듈을 구현하였다. 무선 전단부 모듈은 3개의 LTCC 대역 통과 여파기와 FBAR 여파기, embedded된 정합 회로, Wi-Fi와 WiMAX 모드 선택용 SPDT 스위치, 송?수신 선택용 SPDT 스위치 그리고 대역 선택용 SP4T 스위치로 구성되어 있다. 모드 선택용 SPDT 스위치의 DC block 커패시터를 실장하기 위한 패드 패턴에서 LTCC의 적층 구조의 특성으로 인해 0.2~0.3 pF의 값을 가지는 기생 성분이 생기게 된다. 이러한 기생 성분은 설계된 회로의 매칭을 틀어지게 만들어 결과적으로 모듈의 전기적 성능을 저하시킨다. 따라서 기생 커패시터 성분에 상응하는 칩 인덕터를 DC block 커패시터 패드 패턴과 병렬로 달아서 기생 성분을 상쇄하여 모듈의 특성을 최적화하였다. 제작된 무선 전단부 모듈은 내부 접지(inner GND) 3개 층을 포함한 12층으로 설계되었으며, 크기는 6.0 ㎜×6.0 ㎜×0.728 ㎜이다. In this paper, a compact RF Front-end module for Wireless Fidelity(Wi-Fi) and Worldwide Interoperability for Microwave Access(WiMAX) applications is realized by low temperature co-fired ceramic(LTCC) technology. The RF Front-end module is composed of three LTCC band-pass filters, a Film Bulk Acoustic Resonator(FBAR) filter, fully embedded matching circuits, an SPDT switch for mode selection, an SPDT switch for Tx/Rx selection, and an SP4T switch for band selection. The parasitic elements of 0.2~0.3 pF are generated by the structure of stacking in the top pad pattern for DC block capacitor of SPDT switch for mode selection. These kinds of parasitic elements break the matching characteristic, and thus, the overall electrical performance of the module is degraded. In order to compensate it, we insert a parallel lumped-element inductor on capacitor pad pattern for DC block, so that we obtain the optimized performance of the RF Front-end module. The fabricated RF front-end module has 12 layers including three inner grounds and it occupies less than 6.0 ㎜×6.0 ㎜×0.728 ㎜.