악교정수술에서 광전자 포인트 마커를 이용한 상악골 위치 변화의 계측 및 계산 방법 연구

박종웅,김성민,어미영,박정민,명훈,이종호,김명진,Park, Jong-Woong,Kim, Soung-Min,Eo, Mi-Young,Park, Jung-Min,Myoung, Hoon,Lee, Jong-Ho,Kim, Myung-Jin 대한악안면성형재건외과학회 2011 Maxillofacial Plastic Reconstructive Surgery Vol.33 No.3

Purpose: To apply a computer assisted navigation system to orthognathic surgery, a simple and efficient measuring algorithm calculation based on affine transformation was designed. A method of improving accuracy and reducing errors in orthognathic surgery by use of an optical tracking camera was studied. Methods: A total of 5 points on one surgical splint were measured and tracked by the Polaris $Vicra^{(R)}$ (Northern Digital Inc Co., Ontario, Canada) optical tracking system in two cases. The first case was to apply the transformation matrix at pre- and postoperative situations, and the second case was to apply an affine transformation only after the postoperative situation. In each situation, the predictive measuring value was changed to the final measuring value via an affine transformation algorithm and the expected coordinates calculated from the model were compared with those of the patient in the operation room. Results: The mean measuring error was $1.027{\pm}0.587$ using the affine transformation at pre- and postoperative situations and the average value after the postoperative situation was $0.928{\pm}0.549$. The farther a coordinate region was from the reference coordinates which constitutes the transform matrixes, the bigger the measuring error was found which was calculated from an affine transformation algorithm. Conclusion: Most difference errors were brought from mainly measuring process and lack of reproducibility, the affine transformation algorithm formula from postoperative measuring values by using of optic tracking system between those of model surgery and those of patient surgery can be selected as minimizing the difference error. To reduce coordinate calculation errors, minimum transformation matrices must be used and reference points which determine an affine transformation must be close to the area where coordinates are measured and calculated, as well as the reference points need to be scattered.

호기성(好氣性) 침지형(浸漬型) 생물막공법(生物膜工法)에서 온도(溫度)가 처리효율(處理?率)에 미치는 영향(影響)

박종웅,유명진,Park, Jong Woong,Yu, Myong Jin 대한토목학회 1991 대한토목학회논문집 Vol.11 No.1

본(本) 연구(硏究)에서는 침지형(浸漬型) 생물막(生物膜) 반응조(反應槽)에서 온도(溫度)의 변화(變化)가 미생물(微生物) 성상(性狀)과 처리효율(處理?率)에 미치는 영향(影響)을 구명(究明)하였다. 침지형(沈漬型) 생물막(生物膜) 반응조(反應槽)에서 온도와 매체충전율(媒體充塡率)을 변화시켜 얻어진 연구결과를 요약(要約)하면 다음과 같다. 1. 생물막(生物膜) 밀도(密度), 부착미생물량(附着微生物量), 생물막(生物膜)두께는 온도(溫度)와 매체충전량(媒體充塡量)의 변화에 상당한 영향을 받는다. 2. 반응조 내의 총(總) 미생물(微生物) 중 부유미생물(浮遊微生物)이 차지하는 비율은 약 10-50%로 부유미생물(浮遊微生物)이 기질제거(基質除去)에 관여하는 역할을 무시할 수 없음이 입증되었다. 3. 온도와 총 미생물농도에 따른 BOD 제거효율(除去?率)을 나타내는 관계식을 유도할 수 있었다. 4. 본 공법(工法)은 온도변화에 강(?)한 편으로, Van't Hoff-Arrhenius 변형식(變形式)을 이용하여 구(求)한 온도보정계수(溫度補正係數)는 1.042이었다. The objective of this study was to investigate the effect of temperature on microbial characteristics and treatment efficiency in aerated submerged biofilm process. From the results of the research, conclusions were derived as following: 1. Biofilm density, attached biomass and biofilm thickness were $30-42mg/cm^3$, $1.2-2.7mg/cm^2$ and $380-690{\mu}m$, respectively. These were greatly affected by the variation of temperature ($5-20^{\circ}C$) and packing ratio(45-90%). 2. The ratio of suspended biomass to the total biomass in the reactor was in the range of 10 to 50 % in accordance with the variation of temperature and packing ratio. Therefore, the portion of suspended biomass cannot be neglected. 3. BOD removal efficiency increased as either temperature or biomass(suspended and attached) concentration increased. 4. The aerated submerged biofilm process appeared to be less affected by temperature variation and the estimated temperature correction coefficient of the Van't Hoff-Arrhenenius equation was 1.042.

선택적 iNOS 억제에 의한 골격근 재관류 손상의 감소

박종웅,이광석,김성곤,박정호,왕준호,전우주,이정일,Park, Jong-Woong,Lee, Kwang-Suk,Kim, Sung-Kon,Park, Jung-Ho,Wang, Joon-Ho,Jeon, Woo-Joo,Lee, Jeong-Il 대한미세수술학회 2006 Archives of reconstructive microsurgery Vol.15 No.1

The purpose of this study is to determine the effects of selective inducible nitric oxide synthase (iNOS) inhibitor N-[3-aminomethyl]benzyl]acetamidine (l400W) on the reperfused cremaster muscle. The extracellular superoxide dismutase knockout ($EC-SOD^{-/-}$) mice was used to make the experimental window for ischemia-reperfusion injury. The muscle was exposed to 4.5 h of ischemia followed by 90 min of reperfusion and the mice received either 3 mg/kg of 1400W or the same amount of phosphate buffered saline (PBS) subcutaneously at 10 min before the start of reperfusion. The results showed that 1400W treatment markedly improved the recovery of the vessel diameter and blood flow in the reperfused cremaster muscle compared to that of PBS group. Histological examination showed reduced edema in the interstitium and muscle fiber, and reduced nitrotyrosine formation (a marker of total peroxinitrite ($ONOO^-$) in 1400W-treated muscle compared to PBS. Our results suggest that iNOS and $ONOO^-$ products are involved in skeletal muscle I/R injury. Reduced I/R injury by using selective inhibition of iNOS is perhaps via limiting cytotoxic $ONOO^-$ generation, a reaction product of nitric oxide (NO) and superoxide anion ($O_2^-$). Thus, inhibition of iNOS appears to be a good treatment strategy in reducing clinical I/R injury.

지렁이 분변토와 주정슬러지 혼합 배양액을 이용한 Biofilter에서의 고농도 악취제거

박종웅,장석조,Park, Jong-Woong,Jang, Seg-Joo 한국환경보건학회 2014 한국환경보건학회지 Vol.40 No.2

Objectives: This study was conducted to investigate the removal of high odor concentration from swine wastewater treatment facility by full scale biofilter using liquid with deodorant mixed with earthworm cast and distillery sludge. Methods: The supply of the culture liquid to the microorganism on the media in the biofilter increases the activity and growth of biomass. The experimental equipment was biofilter tower with treatment capacity of 90 m 3/min. The experimental conditions included gas flow of $60m^3/min$, retention time of 20 sec, and gas/liquid ratio of 67. Results: With changing season from winter to summer, the inlet odor concentration of ammonia increased from 2.5 ppm to 29 ppm, and of hydrogen sulfide from 21 ppm to 91 ppm, respectively. The odor treatment system with biofilter using the culture liquid was stable when the high loading rate increased and showed excellent removal grade with an average of 96.7% for ammonia, and an average of 93.7% for hydrogen sulfide. The pH and SCOD in the recirculating culture liquid near the bottom of the biofilter tower decreased with operation time, but its influence on the odor removal rate was negligible, because the organic matter (SCOD) was replaced by some culture liquid supplied 2-4 times per day. Conclusions: The biofilter using culture liquid could successfully remove high odor concentration which was generated from swine wastewater treatment facility.

관절경적 삼각섬유연골 손상의 치료

박종웅,Park, Jong-Woong 대한관절경학회 2010 대한관절경학회지 Vol.14 No.2

상지의 압박 신경병증

박종웅,Park, Jong Woong 대한정형외과초음파학회 2009 대한정형외과 초음파학회지 Vol.2 No.2

Compressive neuropathy in the upper extremity can be clinically diagnosed by careful history taking, physical examination of the involved nerve. Electrodiagnosis for the suspected nerve informs severity of compression of the involved nerve and indicates specific site of the lesion. In the early stage of the disease, non-operative treatment generally cures the symptom, however, if the conservative treatment fails, confirmation of the exact site of the lesion should be preceded before the operation. Recently, ultrasonography, as a supportive tool for the diagnosis of compressive neuropathy has increasing popularity for its ability to find space occupying lesion, anatomical change of the nerve, and the pathologic change in the nerve itself. For the successful treatment of the compressive neuropathy, these various diagnostic tools have to be introduced in the orthopaedic clinic. 상지의 말초신경 압박 병증의 진단은 환자의 병력 및 이학적 검사로 이환된 신경 및 부위를 임상적으로 짐작할 수 있지만 신경 압박 부위를 정확히 확인하기 위해서는 전기진단적 검사가 큰 도움이 된다. 대부분 증상의 초기에는 비 수술적 치료가 선행되지만 보존적 치료의 실패로 수술적 치료가 필요할 경우는 각 신경의 가능한 압박 부위 중 정확한 위치를 추정하는 것이 성공적인 수술의 시작이 된다. 또한 전기진단적 검사와 더불어 시행되는 근골격계 초음파 검사는 전기진단적 검사만으로는 진단이 어려운 공간 점유 병소(space occupying lesion; SOL)에 의한 말초신경 압박병증의 진단 및 신경의 해부학적 변화, 신경 내부 병변의 진단에 유용한 것으로 보고되고 있다. 성공적인 말초신경 압박병증의 치료를 위해서는 이러한 다양한 진단 방법을 동원하여 정확한 부위를 확인 후 효과적인 수술을 시행하는 것이 중요하다.

경사 및 가속도 계측자료 융합을 통한 풍력 터빈의 변위 추정

박종웅,심성한,정병진,이진학,Park, Jong-Woong,Sim, Sung-Han,Jung, Byung-Jin,Yi, Jin-Hak 대한토목학회 2015 대한토목학회논문집 Vol.35 No.1

신재생 에너지 개발에 대한 사회적 요구가 증가하면서 경제성 및 기술 성숙도가 높은 풍력발전이 많은 관심을 받고 있다. 대규모 에너지 생산을 위해 풍력 터빈의 대형화와 해상풍력 단지 개발에 대한 많은 연구가 진행되고 있으며, 운영 및 관리(O&M, Operation and Management) 측면에서의 구조적 안전성 평가 및 유지관리의 중요성 또한 지속적으로 증가하고 있다. 안전성 평가를 위한 여러 항목 중 터빈 상부 즉, 허브 높이에서의 변위는 구조물의 강성에 의해 지배되는 직접적인 지표로, 구조물의 건전상태를 쉽게 평가할 수 있는 지표라 할 수 있다. 그러나 풍력 터빈과 같은 대형 구조물의 변위 측정은 장비의 한계로 직접적으로 측정하기에는 많은 어려움이 따른다. 따라서 이 연구에서는 (1) 경사와 가속도의 동적 계측응답 자료를 융합하여 간접적으로 변위를 추정하는 방법을 제안하고, (2) 제안된 방법을 제원이 공개되어 있는 NREL 5 MW급 풍력 터빈에 적용하여 경사계의 수, 경사계의 잡음 수준 및 계측 주파수에 따른 변위 추정의 정확도를 평가하였으며, 실제 변위 측정을 위한 매개변수 연구를 수행하였다. Wind power systems have gained much attention due to the relatively high reliability, good infrastructures and cost competitiveness to the fossil fuels. Advances have been made to increase the power efficiency of wind turbines while less attention has been focused on structural integrity assessment of structural sub-systems such as towers and foundations. Among many parameters for integrity assessment, the most perceptive parameter may be the induced horizontal displacement at the hub height although it is very difficult to measure particularly in large-scale and high-rise wind turbine structures. This study proposes an indirect displacement estimation scheme based on the combined use of inclinometers and accelerometers for more convenient and cost-effective measurements. To this end, (1) the formulation for data fusion of inclination and acceleration responses was presented and (2) the proposed method was numerically validated on an NREL 5 MW wind turbine model. The numerical analysis was carried out to investigate the performance of the propose method according to the number of sensors, the resolution and the available sampling rate of the inclinometers to be used.

가압부상법과 혐기성여상법을 이용한 염색폐수의 전처리에 관한 비교연구

박종웅(Jong Woong Park),장석조(Seg Jo Jang) 大韓環境工學會 1997 대한환경공학회지 Vol.19 No.6

SETTLING PROPERTIES OF AERATED SUBMERGED FILTER BIOMASS

박종웅(Jong Woong Park),Jerzy J . Ganczarczyk 대한환경공학회 1993 대한환경공학회 학술발표논문집 Vol.1993 No.12

혐기 - 호기여상법에 의한 돈사폐수 처리

박종웅(Jong Woong Park),이학영(Hag Young Lee) 大韓環境工學會 1999 대한환경공학회지 Vol.21 No.10