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단일 유효확산계수로 나타낸 동적 흡착탑의 분산일치 적용기준
송동익 ( Dong Ik Song ) 한국화학공학회 1996 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.34 No.6
Criterion for applying the new estimation method for the macro- and micropore effective diffusivities suggested by Song[6] was determined conservatively as θD_p>R²_p>0.5 in terms of the single effective diffusivity by comparing the contour plot between the single and the two diffusivity models. It was confirmed that making use of variance matching instead of skewness matching is desirable for model simplification even when a response curve exhibits a high degree of asymmetry about mean.
송동익 ( Dong Ik Song ) 한국화학공학회 1995 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.33 No.3
A new method to estimate the macro- and micropore(or macropore and solid phase) effective diffusivities of the bidisperse particles was introduced. This method used the relationship between the single and two effective diffusivities which was obtained by matching the second moments or variances from the single and two effective diffusivity diffusion models. It was shown that the new method was suitable for estimation of the two effective diffusivities, based on the results of experiments to adsorb n-butane gas in the beds packed with alumina or zeolite 5A particles.
송동익 ( Dong Ik Song ),이순혁 ( Soon Hyuck Lee ),정웅교 ( Woong Kyo Chung ),이대희 ( Dae Hee Lee ) 대한스포츠의학회 2010 대한스포츠의학회지 Vol.28 No.1
The stress fracture is a disease which results from the repeated application of an abnormal stress to the normal bone, typically occurs in metatarsal bone, tibia, fibular and femur, but medial malleolus is rare. We report a case of stress fracture of medial malleolus in 22-year old wrestler.
송동익 ( Dong Ik Song ) 한국화학공학회 1995 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.33 No.2
A mathematical model has been introduced for the bed packed with porous particles in which capillary condensation has occurred. Estimation methods for the parameters related to capillary condensation were suggested using the results for the computation of the pore size distribution obtained from the experimental data during desorption process. Variations of the chromatographic response curve were predicted with the degree of capillary condensation. As the degree of capillary condensation increases, response becomes faster and the peak value of the normalized response curve increases within about 30%. Sensitivity test revealed that Peclet number is the most sensitive parameter and partition coefficient becomes sensitive when it is approximately greater than 1. Sensitivity of the gas phase effective diffusivity was found to be very small and the optimum experimental condition for the determination of the reliable effective diffusivity was examined.
견관절의 석회화 건염에 대한 초음파 유도하 다발성 천공술 및 고에너지 체외 충격파 병합치료
정태완,송동익,이순혁,정웅교,Jung, Tae Wan,Song, Dong Ik,Lee, Soon Hyuck,Jeoung, Woong Kyo 대한정형외과초음파학회 2014 대한정형외과 초음파학회지 Vol.7 No.1
목적: 견관절에 발생한 석회화 건염에 대해 초음파 유도하 다발성 천공술 및 고에너지 충격파 병합 치료의 유용성을 알아보고자 하였다. 대상 및 방법: 2010년 1월부터 2013년 6월까지 어깨 통증으로 내원하여 견관절 석회화 건염을 진단받은 환자 중 초음파 유도 하 다발성 천공술 및 고에너지 충격파 병합 치료를 받은 환자 42명을 대상으로 하였고 추시 기간은 평균 45주였다. 임상적 평가는 시술 전과 시술 12주 후의 통증에 대한 시각 점수 척도(pain visual analogue scale, P-VAS), ASES 점수(ASES score)와 UCLA 점수(UCLA score)를 사용하여 평가하였고, 초음파상 평가는 석회 침착의 크기와 상태를 비교하였다. 결과: 시술 후 통증에 대한 시각 점수 척도와 ASES 점수 및 UCLA 점수는 모두 통계적으로 의미 있게 호전되었으며(p<0.05), 침착된 석회는 61%에서 크기가 감소하였고, 27%에서 완전 혹은 거의 완전한 소실이 관찰되었다. 결론: 초음파 유도 하 다발성 천공술 및 고에너지 충격파 병합 치료는 견관절 석회화 건염에서 통증 및 임상 기능의 호전과 침착된 석회를 효과적으로 감소시킬 수 있는 유용한 방법으로 판단된다. Purpose: To evaluate the effectiveness of ultrasonography-guided combined multiple needling and high-energy extracorporeal shock wave therapy (ESWT) for calcific tendinitis of the shoulder. Materials and Methods: We included 42 calcific tendinitis patients who underwent ultrasonograpy-guided multiple needling followed by high-energy ESWT who visited the clinic from January 2010 to June 2013. The average follow up period was 45 weeks. Clinical evaluation was done before and after 12 weeks from treatment, in clinical terms using pain visual analogue scale (P-VAS), ASES, UCLA scores reflecting performance and symptom improvement, and in sonographic terms by studying the changes in size of the calcific nodules. Results: A statistically significant improvement was seen in P-VAS, ASES, UCLA scores and decreased calcification size on sonographic evaluation. Conclusion: Ultrasonography-guided combined multiple needling and high-energy ESWT is considered as a useful method which could provide clinical function improvement and reduction of calcification deposit.