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Mixed dye removal efficiency of polyacrylonitrile-graphene oxide nanofiber composite membrane
Kyung Hyun Kim(김경현),Ja Heon Lee(이자헌),Seung Beom Huh(허승범),Hak Yun Kim(김학윤),Eung Ho Jung(정응호),Paikho Rho(노백호),Hun Kyun Bae(배헌균),Sang-Hun Lee(이상훈),Honksik Byun(변홍식),Wongi Jang(장원기) 대한환경공학회 2022 대한환경공학회 학술발표논문집 Vol.2022 No.11
구강암 적출후 경부 도상 피판을 이용한 구강내 결손부의 재건 -3 치험례-
이성근,임종수,김경현,전소연,조영성,신상훈,조영철,성일용,김욱규,김종렬,정인교,양동규,LEE, Seong-Geun,LIM, Jong-Soo,KIM, Kyung-Hyun,JEON, So-Yeun,CHO, Young-Sung,SHIN, Sang-Hun,CHO, Young-Cheol,SUNG, Iel-Yong,KIM, Uk-Kyu,KIM, Jong-Ryoul,C 대한악안면성형재건외과학회 1998 Maxillofacial Plastic Reconstructive Surgery Vol.20 No.3
이상에서 저자 등은 $T_{1-3}$의 편평상피 세포암의 3증례에서 적출 후 연조직 결손부의 재건을 위해 Tashiro 등에 의해 변형된 Farr등의 경부 도상 피판을 이용하여 술후 특이한 합병증 없이 성공적인 결과를 얻을 수 있었다. 피판 작도시 부피의 한계와 경부 임파절의 전이나 혹은 예방적으로 경부에 3 Gy 이상의 방사선을 투여 받은 환자에서의 사용의 제한점에도 불구하고, 경부도상 피판은 결손 부위에 따른 피판의 다양한 변형이 가능하며, 적출과 동시에 빠르고 간단하게 효과적으로 결손부를 재건할 수 있으며, 공여부에 대한 피부이식이 필요하지 않고, 부가적으로 수술 시간과 입원 기간의 단축을 초래해 환자들의 삶의 질을 높일 수 있다고 사료된다. Many myocutaneous flaps have been used for the reconstruction of intraoral defects caused by the excision of oral cancer. Among these myocutaneous flaps, cervical island flap has been introduced by Farr et al. Although different in detail, this flap was designed as the platysma myocutaneous flap by Futrell et al in the supraclavicular site. Since many authors applied this flap to cover intraoral defect, they discussed deeply the blood supply of this flap. To improve further flap survival, it was modified by Tashiro et al. This flap makes its vascularity highly reliable. The amount of tissue needed for reconstruction can be accurately planned. The surgical and reconstruction procedure can be performed simply, rapidly, and effectively. Oral functions including deglutition, speech, and denture fitting are not compromised. With it's minimal deformity, new donor fields is not necessory. Of course, we keep in mind that this flap has limitations in patients where much bulk of tissue defects is needed and more than 3000 rad radiation due to the metastasis of neck lymph node is exposed. In three patients with intraoral squamous cell carcinoma($T_{1-3}N_0M_0$), we performed induction chemotherapy with FP regimen including pepleomycin. Thereafter, we ablated oral cancer and peformed reconstruction of intraoral defects with cervical island flap designed by Tashiro et al. Due to these significant benefits and minimal limitations, we have found that this flap is adequate for reconstruction of most intraoral defects following cancer ablation.
베이지안 추정을 이용한 팔당호 유역의 계절별 클로로필a 예측 및 오염특성 연구
김미아 ( Mi Ah Kim ),신유나 ( Yuna Shin ),김경현 ( Kyung Hun Kim ),허태영 ( Tae Young Heo ),유문규 ( Moon Kyu Yoo ),이수웅 ( Su Woong Lee ) 한국물환경학회 2013 한국물환경학회지 Vol.29 No.6
In recent years, eutrophication in the Paldang Lake has become one of the major environmental problems in Korea as it may threaten drinking water safety and human health. Thus it is important to understand the phenomena and predict the time and magnitude of algal blooms for applying adequate algal reduction measures. This study performed seasonal water quality assessment and chlorophyll-a prediction using Bayseian simple/multiple linear regression analysis. Bayseian regression analysis could be a useful tool to overcome limitations of conventional regression analysis. Also it can consider uncertainty inprediction by using posterior distribution. Generally, chlorophyll-a of a P2(Paldang Dam 2) site showed high concentration in spring and it was similar to that of P4(Paldang Dam 4) site. For the development of Bayseian model, we performed seasonal correlation. As a result, chlorophyll-a of a P2 site had a high correlation with P5(Paldang Dam 5) site in spring (r =0.786, p<0.05) and with P4 in winter (r =0.843, p<0.05). Based on the DIC (Deviance Information Criterion) value, critical explanatory variables of the best fitting Bayesian linear regression model were selected as a PO4-P (P2), Chlorophyll-a (P5) in spring, NH3-N (P2), Chlorophyll-a (P4), NH3-N (P4) in summer, DTP (P2), outflow (P2), TP (P3), TP (P4) fall, COD (P2), Chl-a (P4) and COD (P4) in winter. The results of chlorophyll-a prediction showed relatively hagh R2 and low RMSE values in summer and winter.