Statistically Modeled Adsorption Isotherms for the Multilayer Gas Molecules Adsorbed on Non-porous Solid Adsorbents of Two and Three Groups Sites

Kim, Dae Kyoum 한국화학공학회 2000 Korean Journal of Chemical Engineering Vol.17 No.2

The adsorption isotherms with each saturation vapor pressure factor (c_(s1), c_(s2) or c_(s3)) for two groups of sites in two cases of the multilayer and for three groups of sites in one case of the multilayer are derived statistically in heterogeneous non-porous solid adsorbents without interactions among the adsorbed molecules. When some sites of BET isotherm are substituted by less energetic sites, the two-group isotherm obtained by the substitution shows less adsorption over the whole range of relative pressure than the BET isotherm prior to the substitution, at any combined values of f₁ with M₁ of the two-group isotherm with the same saturation vapor pressure factor. A method to get the monolayer sites (v_m) from the ratios of the experimental isotherm to the theoretical isotherm at the whole relative vapor pressure minimizing the standard error is suggested. Our two- or three-group isotherms calculated through many experimental adsorption isotherm data selected appropriately provide larger values of v_m than those obtained from BET isotherms. Differential heat vs. v/v_m and Bose-Condensation heat are mentioned.

Statistical Condensation Adsorption Isotherms of Gas Molecules Adsorbed on Porous Adsorbents , Surface Monolayer Adsorption Isotherms and Hysteresis Phenomena

Kim, Dae Kyoum 한국화학공학회 2000 Korean Journal of Chemical Engineering Vol.17 No.5

Condensation adsorption isotherms of type IV (or V) according to BDDT classification on porous adsorbents composed of one or two groups of adsorption sites are derived statistically. When β_(c1)(or β_(c2)) is less than unity, the isotherm becomes type N, and when it is greater than unity, the isotherm becomes type V. It is understood that the negative sign(-) of the additional adsorption energy, q, in the nth layer in deriving those theoretical isotherms plays a decisive role on the horizontally flat approach to the axis of the isotherm near the saturation vapor pressure. The values of the surface area can be calculated easily. The pore radii of all the adsorbents which we have obtained by using the derived isotherms with respect to the appropriately selected experimental data agree with those obtained by using the Kelvin equation. Many surface mono-layer adsorption isotherms are obtained in the process of deriving the various adsorption isotherms. From them we can learn that the surface sites are not adsorbed completely even near the saturated vapor pressure, and we can find the range of error by comparing them with v_ms of the BET equation. We could mention through judging the results of a great deal of the experimental isotherm data of types IV and V that $quot;the cause of hysteresis phenomena of the condensation adsorption-desorption of gases is originated from the deviation from the thermodynamically reversible adsorption-desorption process in the condensation adsorption-desorption of gases$quot;.

베체트 장염의 임상 양상과 경과: 진단 아형에 따른 분석

김대겸 ( Dae Kyoum Kim ),양석균 ( Suk Kyun Yang ),변정식 ( Jeong Sik Byeon ),명승재 ( Seung Jae Myung ),조지윤 ( Ji Yun Jo ),최기돈 ( Kee Don Choi ),이진혁 ( Gin Hyug Lee ),정훈용 ( Hwoon Yong Jung ),홍원선 ( Weon Seon Hong ),김 대한장연구학회 2005 Intestinal Research Vol.3 No.1

목적: 베체트 장염은 치료에 대한 반응이 나쁘며 장천공, 출혈 등의 심각한 합병증을 야기하므로 베체트병의 중요한 유병 및 사망의 원인이 된다. 하지만 베체트 장염의 역학, 치료방법, 장기적 임상경과에 대해서는 아직 자세한 연구가 되어 있지 않으며 진단기준 또한 매우 다양하다. 이에 저자들은 일본 베체트병 연구회의 진단 기준에 의한 베체트 장염 환자들의 임상양상과 장기적 경과를 알아보고자 하였으며 의심형 베체트 장염 환자들의 임상양상이 완전형 및 불완전형 베체트 장염 환자들과 다른지 알아보고자 하였다. 대상 및 방법: 1989년 6월부터 2005년 1월까지 서울아산병원에 내원한 환자 중 1987년 일본 베체트병 연구회의 베체트병 진단기준에 부합하면서 대장내시경을 통해 베체트 장염을 확인한 87명을 대상으로 전신증상, 소화기증상, 대장내시경소견, 누적수술률 등의 임상양상을 후향적으로 조사하였고 의심형 베체트 장염 환자들의 임상양상을 완전형 및 불완전형 베체트 장염 환자들과 비교하였다. 결과: 남녀 비는 2:1이었으며 진단 당시의 평균 나이는 38.4세(14-66)였다. 베체트병의 전신증상으로 구강궤양 87예(100%), 음부궤양 64예(73.6%), 피부병변 52예(59.8%), pathergy 검사 양성률 14/60 (23.3%), 안구병변 7예(8.0%)였다. 소화기 증상으로는 복통 77예(88.5%), 체중감소 36예(41.4%), 설사 35예(40.2%), 복부압통 20예(23.0%), 장관출혈 18예(20.6%), 구역, 구토 16예(18.4%)의 순이었다. 대장내시경소견상 회맹부에 국한된 원형 또는 타원형의 단일궤양이 가장 흔한 소견이었다. 24명의 환자가 베체트 장염과 연관되어 한 차례이상의 수술을 시행 받았으며 누적수술률은 1년 20.7%, 2년 25.6%, 5년 27.2%, 10년 30.9%였고 누적 재수술률은 1년 9.0%, 2년 13.8%, 5년 29.3%, 10년 38.2%였다. 의심형 베체트 장염 환자의 임상양상을 완전형 및 불완전형 베체트 장염 환자의 비교하였을 때 베체트병 전신증상을 제외한 소화기증상, 대장내시경소견, 검사실 소견, 누적수술률에 있어서 차이를 보이지 않았다. 결론: 베체트 장염 환자는 10년 내에 30.9%의 환자가 수술을 경험하며 이 중 38.2%는 재수술을 경험하므로 장기적인 추적관찰이 요구된다. 의심형 베체트 장염 환자는 국제 진단기준을 충족시키지 못하지만 완전형 및 불완전형 베체트 장염 환자와 베체트병 전신증상을 제외한 임상양상에 차이가 없으므로 베체트 장염으로 간주되어야 한다. Background/Aims: Intestinal Behcet`s disease (BD) is one of the main causes of morbidity and mortality of BD because it frequently results in serious complications such as perforation and bleeding. But clinical course of intestinal BD is not well-known. The aim of this study was to review clinical manifestations of intestinal BD, and to compare clinical findings of complete and incomplete types with those of suspected type. Methods: From June 1989 to January 2005, 87 patients who had colonoscopic evidence of intestinal BD and met the criteria proposed by BD Research Committee of Japan were enrolled in this study. Clinical manifestations were collected by retrospective review of medical records. Results: Mean age at diagnosis was 38.4 years (14-66) and sex ratio was 2:1. Abdominal pain was the most frequent gastrointestinal symptom. A single, round ulcer localized at the ileocecal area was the most common colonoscopic finding. Cumulative incidence of first and second operation in 10 years was 30.9% and 38.2%, respectively. Clinical manifestations of suspected type were not different from those of complete and incomplete types. Conclusions: Long-term follow up and close observation is needed for patients with intestinal BD. Although suspected type does not meet the criteria proposed by International Study Group for BD, it should be considered as BD. (Intest Res 2005; 3:48-54)

폐쇄성 황달을 주소로 한 자가면역성 만성 췌장염

이윤선 ( Yoon Seon Lee ),김명환 ( Myung Hwan Kim ),최귀숙 ( Kwi Sook Choi ),김진영 ( Jin Young Kim ),김대겸 ( Dae Kyoum Kim ),김형수 ( Hyeoung Su Kim ),장혜숙 ( Hye Sook Chang ),이상수 ( Sang Soo Lee ),서동완 ( Dong Wan Seo ),이 대한소화기학회 2003 대한소화기학회지 Vol.41 No.3

We report a case of autoimmune chronic pancreatitis presenting as obstructive jaundice. A 70-year-old man was admitted to the hospital with jaundice. The serum IgG and anti-histone antibody of the patient were elevated. Abdominal CT revealed the diffuse enlargement of the pancreas, especially more prominent in the head. Endoscopic retrograde cholangiopancreaticography demonstrated an irregular narrowing of the main pancreatic duct and tight stricture of the distal common bile duct. Percutaneous needle biopsy at the pancreatic head showed parenchymal fibrotic changes with infiltration of lymphocytes and plasma cells. After two months of oral steroid treatment, the abnormalities in clinical, laboratory, and radiological findings were improved markedly. (Korean J Gastroenterol 2003;41:234-238)

Structural Relationship among Affective Characteristics, Cognitive Characteristics, Students’ Participation, and Course-retaking Intention in E-learning Environment

Dae-sik Kang,Jeong-kyoum Kim 보안공학연구지원센터 2013 International Journal of Smart Home Vol.7 No.6

민속씨름선수들의 성취목표성향과 자기관리 및 선수만족의 관계

김보겸(Kim, Bo-Kyoum),이태현(Lee, Tae-Hyun),한대호(Han, Dae-Ho),공성배(Kong, Seong-Bae) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.3

This study was designed to find the relationship among folk Ssireum players’ achievement goal orientation, self-management and satisfaction. To test this, 132 folk Ssireum players who were attended Boeun Hansik Sssireum Mastership held in 2, April 2015 were sampled. The resulting data were processed by means of frequency analysis, exploratory factor analysis, correlation analysis, and multiple regression analysis using SPSS 18.0 program. Results derived from the researches based on the aforementioned methods and data analyses are as follows: First, task orientation which is sub factor of achievement goal orientation had positive effect on personal management, mental management, and body management sub factors of self management. Second, task orientation and ego orientation sub factors of achievement goal orientation had positive effect on satisfaction. Third, mental management, personal management, and body management sub factors of self management had positive effect on satisfaction.

대학 원격교육환경에서 학습자의 정의적 특성, 학습실재감, 몰입감, 학습만족도간 구조적 관계 분석

강대식 ( Dae Sik Kang ),김정겸 ( Jeong Kyoum Kim ),정회인 ( Hoe In Chong ) 한국교육정보미디어학회(구 한국교육정보방송학회) 2011 교육정보미디어연구 Vol.17 No.1

본 연구는 대학 원격교육환경에서 학습자의 정의적 특성, 학습실재감, 몰입감, 학습만족도 간의 구조적 인과관계를 알아보고자 하였다. 연구수행을 위해 가설적 연구모형을 도출한 후, D광역시 H대학교에서 2010년 1학기동안 원격강의를 수강한 대학생 500명을 대상으로 설문조사를 실시하여 최종 217부를 분석하였다. 연구결과, 첫째, 학습자의 학업적 자기효능감, 학습참여 동기, 혁신성향 등을 하위변인으로 포함하는 구성개념 즉 정의적 특성은 학습실재감, 몰입감, 학습만족도에 직접적인 영향을 미치는 것으로 나타났다. 둘째, 학습실재감, 몰입감은 학습만족도에 직접적인 영향을 주고 있으며 학습실재감은 몰입감에 유의한 영향을 미치는 것으로 나타났다. 셋째, 학습실재감과 몰입감은 학습자의 정의적 특성과 학습만족도와의 관계를 유의하게 매개하였다. 이상의 연구결과로 볼 때, 원격교육환경에서 학습자의 학습만족도를 향상시키기 위해서 학습자의 정의적 특성뿐만 아니라, 학습실재감, 몰입감 등을 고려한 교수학습 설계전략이 필요할 것이다. The purpose of present study is to verify the structural relationship among affective characteristics, learning presence, learning flow, learning satisfaction in distance education. For this study, a university in korea was chosen to conduct web survey. The subjects were 217 students who participated in distance education courses. A hypothetical model was proposed, which was composed of affective characteristics as a extraneous variable, learning presence, learning flow, learning satisfaction as endogenous variables. And learning presence, learning flow have been suggested as intervening endogenous variables. The result of this study through structural equation modeling analysis is as follows: First, affective characteristics affect learning satisfaction. Second, learning presence, learning flow affect learning satisfaction. Third, learning presence and learning flow mediated between affective characteristics and learning satisfaction.

Clinical Features And Outcomes of Severe Epstein-Barr Virus Hepatitis Presented with Jaundice

( Young Suk Lim ),( Dae Kyoum Kim ),( Kang Mo Kim ),( Han Chu Lee ),( Yong Hwa Chung ),( Yung Sang Lee ),( Dong Jin Suh ) 대한간학회 2006 Clinical and Molecular Hepatology(대한간학회지) Vol.12 No.3(S)

구조용강의 J-R곡선평가시 Load Ratio 해석의 유효성 검토

Han-Ki Yoon(윤한기),Dae-Ho Woo(우대호),Youn-Kyoum Kim(김연겸),Gee-Jun Cha(차귀준) 한국동력기계공학회 1997 한국동력기계공학회 학술대회 논문집 Vol.- No.-

종합격투기에 대한 미디어 시청동기가 수련생들의 시청몰입 및 대회참가욕구에 미치는 영향

공성배(Kong, Seong-Bae),한대호(Han, Dae-Ho),김보겸(Kim, Bo-Kyoum) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.4

The purpose of this study is to find the effect of Mixed Martial Arts(MMA) media watching motivation on trainee’s watching flow and competition participation needs. To test this, 307 Mixed Martial Arts trainees from Seoul, Kyunggi, and Incheon province are sampled by using purposive sampling method. The resulting data were processed by means of frequency analysis, exploratory factor analysis, reliability analysis, correlation analysis, and multiple regression analysis using SPSS 18.0 program. Results derived from the researches based on the aforementioned methods and data analyses are as follows: First, vicarious gratification, time spending, social transaction, and amusement pursuit which are sub factor of media watching motivation had positive effect on reality sub factor of watching flow; vicarious gratification, time spending, and social transaction had positive effect on involvement; vicarious gratification, time spending, and amusement pursuit had positive effect on curiosity; amusement pursuit, vicarious gratification, and time spending had positive effect on pleasure. Second, vicarious gratification and time spending which are sub factor of media watching motivation had positive effect on competition participation needs. Third, involvement, reality, curiosity and pleasure sub factors of watching flow had positive effect on competition participation needs.