에멀젼型 液膜에 對한 數式모델 比較硏究

宋東益,崔相俊 慶北大學校 1983 論文集 Vol.36 No.-

Two diffusion-controlled mathematical models for emulsion-type liquid membrane, which were proposed by Lightfoot and Ho, and Ihm and Choi, were simulated by solving numerically the coupled moving boundary value problem using Crank-Nicholson implicit method and were compared with the batch experimental data obtained previously for removal of phenol from waste water. The results have shown that Lightfoot and Ho's model which was based on uniform mass transfer resistance inside the emulsion globules was not in good agreement with the experimental data especially at initial time period, but Ihm and Choi's model considering mass transfer resistances in the outer liquid membrane layer and in the inner reacted zone simulataneously, was fitted well the experimental data for nearly entire time period. Therefor, Ihm and Choi's model taking into consideration the outer mass transfer resistance layer of liquid membrane was thought to be more predictive and more precise than Lightfoot and Ho's one in the emulsion-type liquid membrane.

擔體를 包含한 에멀젼型 液膜의 구리이온 促進 傳達에 關한 模寫硏究

宋東益,崔相俊 慶北大學校 1984 論文集 Vol.38 No.-

A mathematical model for facilitated transport simultaneously taken account of both the formation reaction of copper complex at the external aqueous solution and internal diffusion of the complex in the liquid membrane was developed and compared with the experimental data. Overall reaction equilibrium constant was estimated to be 6×10exp(-10) by fitting the model equations to the experimental data. The formation rate of copper complex was confirmed to be nearly first order with respect to the copper ion concentration. More studies on the reaction order of the hydrogen ion concentration, however, seem to be required. First of all, kinetic studies should be performed to obtain more accurate reaction rate equation for the development of the extraction processes in the future.

에멀젼형 액막의 안정성에 영향을 미치는 인자들 : 실험계획법에 의한 체계적 접근 예 An example of systematic approach using experimental design

송동익 경북대학교 공과대학 1986 工大硏究誌 Vol.15 No.-

Factors influencing on the stability of the emulsion-type liquid membrane were analysed using factorial design method. It was shown that the volume ratio of aqueous phase to oil phase(W/O ratio) and the pH of the external aqueous phase were the main effects on liquid membrane stability. Binary interaction between W/O ratio and aqueous phase pH was also important as the surfactant weight percent increased. The range of each influential variable which was expected to give a stable liquid membrane was determined from single variable experiment.

체외충격파 쇄석술의 치료의 성공률과 Hounsfield units 상관관계

김동준,이상익,송동우,정태융 관동대학교 의과학연구소 2006 關東醫大學術誌 Vol.10 No.1

液膜法에 依한 Cu(Ⅱ) 이온의 抽出에 關한 硏究

崔相俊,宋東益 慶北大學校 1984 論文集 Vol.37 No.-

Water in oil (W/O) emulsion was prepared from aqueous hydrochloric acid solution and xylene containing both benzoyl acetone as a carrier and Span 80 as a surfactant. After dispersing W/O emulsion into a third aqueous phase, external buffer solution dissolving copper ion, water in oil in water (W/O/W) emulsion was manufactured. Copper ion extraction was performed using this W/O/W emulsion system. Effects of characteristic of external aqueous solution on emulsion stability were investigated and optimum extraction conditions were determined using the results of extraction experiment. Optimum conditions were as follows; surfactant concentration was 2wt. %, internal aqueous hydrochloric acid concentration 0.3M, carrier concentration 0.02M, stirring speed 200 rpm, pH of external aqueous buffer solution 5.5 and volume ratio of external aqueous buffer solution to emulsion phase 6. When initial copper concentration of external aqueous buffer solution was 500 ppm, copper ion could be removed to 99% from external solution in 30 min.

한국 대도시 고령자의 체격, 체력 및 운동실태와 운동 프로그램개발에 관한 연구

김경지,강동원,장주호,전익기,윤우상,곽은창,박영진,유재충 경희대학교 사회체육연구소 1996 體育科學論叢 Vol.- No.9

The purpose of this study was to investigate the patterns of the health related variables, and physical characteristics and physical fitness of the elderly people in order to provide a exercise program. The data about the health related variables were collected through the personal interview, and the data about physical charateristics and physical fitness (height, weight, % body fat, blood pressure, pulse rate, grip stength, trunk flexion, side step test, 2 min, harvard step test) of 373 elderly people living Seoul and kyungkee area were collected. The conclusions of this study can be summarized as follow; 1. The test results about smoking, drinking, sleeping and self-evaluation of health revealed that the elderly people have self-confidence about their health. 2. Not many elderly people participate the proper exercise program even though they recognize the need of exercise. 3. The results showed that the elderly people do not pay much attention to the intensity of the exercise. 4. Muscle strength training for leg and the lower back and cardio-vascular endurance training was recommended to reduce the risk of varius problems caused by aging. 5. A exercise program was suggested for the elderly people.

한국어 판 구조화 임상면담도구 개발 : 신뢰도 연구

한오수,안준호,송선희,조맹제,김장규,배재남,조성진,정범수,서동우,함봉진,이동우,박종익,홍진표 대한신경정신의학회 2000 신경정신의학 Vol.39 No.2

연구목적: 정신장애의 정확한 진단과 평가는 임상에서뿐만 아니라 신뢰성 있는 연구를 위해서도 매우 중요하다. Structured Clinical Interview for DSM-IV(SCID)는 임상전문가들이 사용하는 진단도구로서, 비교적 짧은 시간에 정확한 진단을 내릴 수 있다. 본 연구는 한국어판SCID를 개발하고 그 신뢰도를 평가하기 위해 수행되었다. 방법: 국문학자가 포함된 번역위원회를 통하여 연구용판 SCID를 번역한 후, 정신과 의사 2인과 임상심리학자 1인에게 한국어판SCID 실시방법을 교육시킨 뒤 한국어판SCID를 이용한 면담의 평가자간 신뢰도 (interrater reliability)를 검증하였다. 면담 대상은 1999년 2월에서 3월까지 2개 병원 정신과에 치료중인 환자 90명(남:41명, 여:29명)이었다. 결과: 현재 장애(current disorder) 평가에서 주요 우울장애, 기분부전장애, 정신분열병, 알코올 남용 및 의존, 기타 물질 남용 또는 의존, 여러 불안장애들 및 섭식장애 등과 같은 대부분 장애의 kappa값은 .70이상으로 매우 높았다. 그 이외의 양극성 장애, 망상장애, 광장공포증, 감별 불능 신체화 장애 및 건강염려증의 kappa값도 .69에서 .40사이로 수용할 수 있는 정도였다. 평생 장애(lifetime disorder)에서는 양극성 장애(k=.69)와 감별 불능 신체화장애(k=.59)를 제외한 다른 모든 장애의 kappa값이 .70이상이었다. K-SCID 면담시 Ⅰ축 질환에 대하여 흔하게 다중 진단이 내려졌으며, 평균 진단 수는 1.5∼1.7개로 나타났다. 결론: 한국어판 SCID는 신뢰도가 높은 진단도구로 생각되며, 향후 정신질환의 정확한 진단과 임상연구에 유용하게 사용될 수 있다. Objectives: Accurate diagnosis and assessment for psychiatric disorders is crucial for research, as well as for clinical practice. Structured Clinical Interview for DSM-Ⅳ(SCID-RV) is a less time-consumimg and more accurate structured diagnostic interview form. It can be used by clinical professions and is known for a reliable diagnostic tool. Present study was conducted to develop Korean version of SCID-RV and to test the inter-rater reliability. Methods: The authors have translated original SCID-RV into Korean, and revised in parallel with sociocultural background of Korea. Ninety patients from two psychiatric hospitals, both outpatient and inpatient, were interviewed and rated independently by three raters. Results: The kappa coefficients for most of illnesses, such as major depressive disorder, dysthymia, schizophrenia, alcohol abuse and dependency, anxiety disorder and eating disorder were excellent(>0.70) in the evaluation of current disorders. And the kappa coefficients for bipolar disorder, delusional disorder, agoraphobia, undifferentiated somatoform disorder, and hypochondriasis were acceptable(>0.40) in the evaluation of current disorders. In the evalua-tion of lifetime disorders, the concordant rates of all the diagnoses except bipolar disorder and undifferentiated somatoform disorder were excellent. Lack of hierarchy in DSM-Ⅳ allows for multiple Axis I diagnoses. Mean numbers of Axis I diagnoses per subject assigned by the three raters were 1.5-1.7. Conclusions: Our findings confirm that SCID-RV yields highly reliable diagnoses. SCID-RV is recommended for accurate diagnosis in clinical practice and research on psychiatric disorders.

저농도 실내공기 정화를 위한 염소화 및 방향족 탄화수소의 광촉매 분해

조완근,권기동,최상준,송동익 한국환경과학회 2004 한국환경과학회지 Vol.13 No.9

This study evaluated the technical feasibility of the application of TiO₂ photocatalysis for the removal of volatile hydrocarbons(VHC) at low ppb concentrations commonly associated with non-occupational indoor air quality issues. A series of experiments was conducted to evaluate five parameters (relative humidity (RH), hydraulic diameter (HD), feeding type (FT) of VHC, photocatalytic oxidation (PCO) reactor material (RM), and inlet port size (IPS) of PCO reactor) for the PCO destruction efficiencies of the selected target VHC. None of the target VHC presented significant dependence on the RH, which are inconsistent with a certain previous study that reported that under conditions of low humidity and a ppm toluene inlet level, there was a drop in the PCO efficiency with decreasing humidity. However, it is noted that the four parameters (HD, RM, FT and IPS) should be considered for better VHC removal efficiencies for the application of TiO₂ photocatalytic technology for cleansing non-occupational indoor air. The PCO destruction of VHC at concentrations associated with non-occupational indoor air quality issues can be up to nearly 100%. The amount of CO generated during PCO were a negligible addition to the indoor CO levels. These abilities can make the PCO reactor an important tool in the effort to improve non-occupational indoor air quality.

열대 지역에서 통일형 초다수성 벼 품종의 생육 및 수량성 비교

이지윤,준현,성환,손영보,송유천,한상익,박동수,권영업,이철원,이종희 忠北大學校 農業科學硏究所 2015 農業科學硏究 Vol.31 No.2

POSTER PRESENTATION 2: Critical Care/Experimental Medicine : PS2-30 ; Impact of Source of Infection on Outcome in Patients with Severe Sepsis and Septic Shock in The Emergency Department

( Dong Ha Song ),( Tae Gun Shin ),( Minjung Kathy Chae ),( Sung Yeon Hwang ),( Sang Chan Jin ),( Tae Rim Lee ),( Won Chul Cha ),( Min Seob Sim ),( Ik Joon Jo ),( Keun Jeong Song ),( Yeon Kwon Jeong ) 대한응급의학회 2014 대한응급의학회 학술대회초록집 Vol.2014 No.2

The purpose of this study was to investigate the effect of common sources of infection on outcome in patients with severe sepsis and septic shock in the emergency department (ED) We conducted a retrospective observational study involving adult patients who were diagnosed with severe sepsis or septic shock in the ED of a tertiary care hospital during the period between August 2008 and March 2012. We categorized patients into four groups based on source of infection (respiratory infection, intra-abdominal infection [IAI], urinary tract infection [UTI], and other sources [OS] group). The primary outcome was in-hospital mortality. Multivariable logistic regression analysis was used to adjust potential confounders including age, gender, serum lactate, SOFA score, timely antibiotic use, and achievements of early resuscitation targets. A total of 758 patients were included and overall in-hospital mortality was 16.6%. There were significant differences in mortality between four groups (27.5% for respiratory infection, 12.1% for IAI, 2.6% for UTI, and 20.0% for other sources, P < 0.01). In patients with IAI, adjusted odds ratios (ORs) for mortality were 0.49 (95% confidence interval [CI], 0.27 - 0.92) compared with the OS group and 0.57 (95% CI, 0.35 -0.93) compared with non-IAI. For UTI, adjusted ORs were 0.08 (95% CI, 0.02 - 0.32) compared with the OS group and 0.10 (95% CI, 0.03 - 0.35) compared with non-UTI. For respiratory infection, adjusted ORs were 1.33 (95% CI, 0.74 - 2.39) compared with the OS group and 2.56 (95% CI, 1.60 - 4.10) compared with non-respiratory infection Our study showed that source of infection was independently associated with in-hospital mortality in patients with severe sepsis and septic shock in the ED. In particular, UTI and IAI were significantly associated with in-hospital survival. Patients with respiratory infection showed significantly higher mortality, compared with non-respiratory infection patients.