H₂S 제거를 위한 Zeolite와 DETOX의 흡착 특성 비교 연구

박대석(Park, Dae-Seok),임지영(Lim, Jiyoung),조영근(Cho, Young-Gun),송승준(Song, Seung-Jun),김진한(Kim, Jin-Han) 한국산학기술학회 2014 한국산학기술학회논문지 Vol.15 No.7

본 연구는 흡착제 Zeolite 3A와 DETOX에 대하여 H₂S의 유입농도와 흡착온도를 공정변수로 하여 포화시간, 흡착량, 흡착속도 등의 H₂S 흡착 제거특성을 평가하기 위하여 수행되었다. H₂S의 유입질량유속이 증가함에 따라 Zeolite 3A의 흡착 용량은 증가되었으나 포화시간은 감소되었다. 한편 DETOX의 흡착용량과 포화시간은 H₂S의 유입질량유속의 증가에 따라 감소되었다. 흡착온도가 상승함에 따라 Zeolite 3A의 흡착용량과 포화시간은 감소한 반면에, DETOX에 대한 이들 값은 증가 하였다. DETOX의 H₂S흡착용량은 Zeolite 3A의 2.5~16.4배 정도 높게 나타났다. 이는 흡착에서 활성화에너지장벽을 넘어설 충돌빈도는 흡착온도가 증가함에 따라 증가한 것에 기인한 것으로 해석된다. Zeolite 3A와 DETOX에 대하여 H₂S의 흡착속 도는 H₂S의 유입질량유속과 흡착온도가 증가함에 따라 증가하였다. H₂S의 흡착속도는 Zeolite 3A가 DETOX의 4배로 나타났 다. DETOX는 Zeolite 3A에 비하여 온도 308~318K에서 포화시간은 더욱 길어지고 흡착용량은 더욱 커진다. 바이오가스 중의 H₂S제거에 있어서 DETOX는 Zeolite 3A에 비하여 유리한 것으로 나타났다. This study examined the H₂S removal characteristics, such as breakthrough time, adsorption capacity, and adsorption rate of adsorbents between Zeolite 3A and DETOX in terms of the H₂S inflow concentration and adsorption temperature. The adsorption capacity of Zeolite 3A increased with increasing mass flow rate of hydrogen sulfide(H₂S) inflow, but the breakthrough time decreased. On the other hand, both the adsorption capacity and breakthrough time of DETOX decreased with increasing mass flow rate of H₂S inflow. The adsorption capacity and breakthrough time of Zeolite 3A decreased with increasing adsorption temperature but those of DETOX increased. The adsorption capacity of DETOX was higher than that of Zeolite 3A by a factor of 2.5 - 16.4 because the collision frequency that overcomes the activation energy barrier increased with increasing adsorption temperature. For Zeolite 3A and DETOX, the adsorption rate of H₂S increased with increasing mass flow rate of H₂S inflow and adsorption temperature. The adsorption rate of H₂S for Zeolite 3A was 4 times as much as that for DETOX. For the removal of H₂S in biogas, DETOX had an advantage over Zeolite 3A because DETOX had a much longer breakthrough time and greater adsorption capacity in the temperature range of 308~318K than Zeolite 3A.

시각적 성장을 하는 나무를 이용한 토론 게시판의 설계 및 구현

김대석(Dae Seok Kim),박부귀(Boo Gui Park),최형일(Hyung Il Choi) 한국HCI학회 2005 한국HCI학회 학술대회 Vol.2005 No.1

인성교육의 실천적 방법으로서 학급훈육 결정 모형 연구: 학급훈육 이론을 중심으로

박우식 ( Park Woo Sik ),김대석 ( Kim Dae Seok ) 한국초등교육학회 2017 초등교육연구 Vol.30 No.4

이 글의 목적은 인성교육을 위한 실천적 방법으로 다양한 학급훈육 이론을 검토하고 학급훈육방법 결정모형을 제안하는 데 있다. 이를 위해 먼저 연대순으로 학급훈육의 특징과 학급훈육의 발전에 기여한 훈육이론을 개괄적으로 탐색하였다. 다음으로 이 연구는 교사 각자에게 적합한 학급훈육방법 결정을 위해 자주 논의되는 외국의 8가지 모형을 제시하였다. 마지막으로 이들 모형 중에서 Edwards & Watts의 모형을 보완하고 학교를 사회체제로 간주한 Hoy & Miskel의 모형의 특징을 반영한 학급훈육의 방법결정을 위한 ‘종합적인 사회체제 모형’을 제안하였다. 본 모형을 통해 교사가 자신에게 적합한 훈육방법을 합리적으로 결정하게 되면 학생의 문제행동 감소와 학급분위기 향상에 기여할 것이다. 아울러 이 글은 연구자들이 다양한 학급훈육이론에 관심을 가지고 국내의 교육환경과 풍토에 적합한 학급훈육이론과 학급훈육 결정모형을 연구하는 계기를 제공할 것이다. The objective of this article is to review various classroom discipline theories as a practical method for character education and to develop an effective discipline decision model. To this end, this study first explores the characteristics of classroom discipline chronologically and researches discipline theories that have contributed to the development of discipline. Next, this research presents eight models that are frequently discussed to determine an appropriate discipline method for each teacher: Lewis' Philosophical Perspectives, Konza, Grainger, & Bradshaw's Behavior Management, Edwards & Watts' Comprehensive Discipline Model, Richmond's Four Behavior Management Approaches, Porter's Discipline Theory Continuous Model, Miles' Leading Philosophical (theoretical) Foundation Model, Burden's Classroom Management Taxonomy Model, and Lyford's Classroom Management Model. Finally, this paper proposes a comprehensive ‘social system model’ of classroom discipline that supplements Edwards' model and reflects the characteristics of Hoy & Miskel's model which regards school as a social system. This study, which determines the method of discipline that is beneficial for both teachers and students, will not only improve the teaching and learning environment, but also improve academic achievement and reduce disruptive behaviors in the classroom and the school. In addition, this paper will give researchers an opportunity to study the discipline theories and discipline decision models suitable for domestic education environments and climates with interest in foreign discipline theories.

원자력시설 해체 규제요건과 기술기준 연계를 통한 요구관리

박희성,박종선,홍윤정,김정국,홍대석,Park, Hee Seoung,Park, Jong Sun,Hong, Yun Jeong,Kim, Jeong Guk,Hong, Dae Seok 한국시스템엔지니어링학회 2018 시스템엔지니어링학술지 Vol.14 No.1

This paper discusses decommissioning procedure requirements management using requirement engineering to systematically manage the technical requirements and criteria that are required in decontamination and decommissioning activities, and the regulatory requirements that should be complied with in a decommissioning strategy for research reactors and nuclear power plants. A schema was designed to establish the traceability and change management related to the linkage between the regulatory requirements and technical criteria after classifying the procedures into four groups during the full life-cycle of the decommissioning. The results confirmed that the designed schema was successfully traced in accordance with the regulatory requirements and technical criteria required by various fields in terms of decontamination and decommissioning activities. In addition, the changes before and after the revision of the Nuclear Safety Act were also determined. The dismantling procedure requirement management system secured through this study is expected to be a useful tool in the integrated management of radioactive waste, as well as in the dismantling of research reactor and nuclear facilities.

개인 및 집단의상결정을 위한 다속성 선호모형

박대석(Park Dae Seok) 한국중소기업학회 1988 中小企業硏究 Vol.10 No.1

N/A

신에너지전원이 연계된 배전계통에서 분류효과에 의한 보호기기 부동작에 관한 연구

박현석(Park, Hyeon-Seok),이범태(Lee, Beom-Tae),박오성(Park, O-Seong),노대석(Rho Dae-Seok) 한국산학기술학회 2009 한국산학기술학회 학술대회 Vol.- No.-

일반적으로 신에너지전원(분산전원)이 설치되면, 연계지점 위치와 사고발생 위치에 따라 %임피던스의 병렬화로 사고전류가 감소하는 분류효과가 발생할 수 있다. 이 때, 보호기기의 최소 정정치 이하로 사고전류가 감소하여 보호기기가 부 동작(동작해야 하는데 동작하지 않은 경우)하는 문제점이 발생한다. 본 연구에서는 현행 분산전원 연계기준 및 선로운영기준을 토대로 어떤 경우에 각 보호기기의 최소 정정치에 미달하는 지 사례 및 최악조건을 제시한다. 본 논문에서는 대칭좌표법을 이용하여 보호기기의 부 동작의 주요 원인이 되는 분류효과에 대한 문제점을 분석하고, 이에 대한 대책방안을 제시한다.

한국인에서 발생한 Sweet 증후군에 대한분석

이근석(Keun Seok Lee),이윤종(Yun Jong Lee),이원섭(Won Sup Lee),안진석(Jin Seok Ahn),이종태(Jong Tae Lee),김원석(Wen Seong Kim),허대석(Dae Seog Heo),방영주(Yung Jue Bang),박선양(Seon Yang Park),조광현(kwang Hyun Cho),김병국(Byoung Koo 대한내과학회 1996 대한내과학회지 Vol.51 No.3

N/A Objectives: Sweet`s syndrome(acute febrile neutrophilic dermetosis) is characterized by fever, neutrophilia, erythematous painful cutaneous plaques, a dense dermal infiltrate onsisting of mature neutrophils, and a rapid response to steroid therapy, This condition is clinically important because it is associated with malignancy and it should be one of the differential diagnosis in the febrile immunocompromized patients with skin lesion, In spite of its clinical importance, there was no report on the epidemiologic characteristics of Sweets syndrome in Korean patients so far because of the rarity of Sweet`s syndrome, This study was performed to investigate characteristics and clinical significance of Sweet`s syndrome in Korean patients. Methods : The authors report a case of Sweet`s syndrome associated with acute myelogenous leukemia, and review the other 23 Korean patients with Sweet's syndrome that have been published in the literature. The characteristics of malignancy-associa- ted Sweet`s syndrome are compared with those of Sweet`s syndrome without malignancy association. Results: 1) Twenty-four cases of Sweet`s syndrome were analysed. Male to female ratio was 8:16 and the mean age was 44.8± 11.7 years. In 79% of patients, fever was noticed during the episodes of Sweet's syndrome. The most frequent sites of skin lesions were the upper extremities(83%), followed by face and head(75%), the lower extremities(75%), neck(46%), and trunk (13%). 2) Associated underlying systemic disorders were present in 15(62%) of the patients. The most frequent associations were chronic inflammatory bowel disease in seven patients, hematologic neoplasia in five, and solid neoplasia in one patients. 3) Leukocyte counts(mean 13,400±8,000/mm3) were higher than 10,000/mm3 in 16(67%) of patients. Erythrocyte sedimentation rates(mean 66.8±44.4mm/ hour) were elevated in 18(82%) of patients. 4) Skin lesion improvements were observed within 2 to 5 days from the initiation of steroid therapy. 5) Malignancies were associated in 6 patients. The initial appearance of Sweet`s syndrome lesions preceded or occurred concurrently with the detection of previously unsuspected malignancy in 67%(4 of 6 patients), In malignancy associated Sweet's syndrome, relative male preponderance, older age, and higher leukocyte counts were observed compared with Sweet's syndrome which is not associated with malignancy. There were no statistical significances, however. The erythrocyte sedimentation rate was the only statistically significant parameter. Conclusion: The characteristics of Sweet`s syndrome in Korean patients were similar to the characteristics of their western counterparts. Workup for malignancy seems appropriate far newly diagnosed Sweet`s syndrome patients in case of elevated erythrocyte sedimentation rate, leukocytosis, old age, and male sex

포스터 발표 : 산업폐수처리 ; 조류를 이용한 폐수의 영양물질 제거에 관한 연구

임병란 ( Byung Ran Lim ),박대석 ( Dae Seok Park ),박기영 ( Ki Young Park ),이기세 ( Ki Say Lee ),백광욱 ( Kwang Wook Baek ) 대한상하수도학회 2007 공동추계 학술발표회 논문집 Vol.2007 No.-

산업폐수처리 : 조류를 이용한 폐수의 영양물질 제거에 관한 연구

임병란 ( Byung Ran Lim ),박대석 ( Dae Seok Park ),박기영 ( Ki Young Park ),이기세 ( Ki Say Lee ),백광욱 ( Kwang Wook Baek ) 한국물환경학회 ( 구 한국수질보전학회 ) 2007 공동 추계학술발표회 Vol.2007 No.-

人蔘製品의 品質安定性에 관한 硏究 - 2. 人蔘精粉과 市販茶類製品의 品質安定性 比較 -

최진호(Jin-Ho Choi),변대석(Dae-Seok Byun),노재일(Jae-Il Ro),박길동(Kil-Dong Park),성현순(Hyun-Soon Sung) 한국식품영양과학회 1984 한국식품영양과학회지 Vol.13 No.2

流通過程중의 品質安定性 維持가 항상 문제시되고 있는 紅蔘精粉(凍結 및 噴霧)의 安定性을 市販茶類 精品과 比較하기 위하여 이들 製品의 吸濕特性을 比較하였고 또 初期水分含量, 粗脂肪含量 및 密度와의 關係를 調査하여 紅蔘精粉의 安定性에 미치는 影響을 比較하였다.<br/> (1) 紅蔘精粉 및 市販茶類製品의 粒度는 100 mesh이하였으며 凍結乾燥製品이 噴霧乾燥製品보다 粒度가 컸다.<br/> (2) 紅蔘精粉(凍結 및 噴霧)이 3.85% 및 4.56%로 初期水分含量이 높은데 비해 커피(凍結 및 噴霧)가 2.17% 및 3.52%로 낮았으며 紅蔘精粉이 커피보다 1.3~1.8 배의 높은 初期水分含量을 나타냈다.<br/> (3) 탱이나 쌍화차가 吸濕率이 가장 낮아 높은 安定性을 나타냈는데 이는 탱과 쌍화차의 脂肪含量(4.12% 및 0.62%)이 높을 뿐만 아니라 密度(0.89 g/㎖ 및 0.59 g/㎖)도 다른 製品에 비해 훨씬 높기 때문으로 판단된다.<br/> (4) 커피의 吸濕率이 紅蔘精粉보다 컸으나 커피의 安定性이 紅蔘精粉보다 더 높은 것은 커피의 初期水分含量 (2.17~3.52%)이 紅蔘精粉 (3.85~4.56%) 보다 낮을 뿐만 아니라 커피의 脂肪含量(0.31~0.38%)도 紅蔘精粉(0.12~0.16%) 보다 훨씬 높기 때문으로 판단된다.<br/> (5) 따라서 紅蔘精粉의 安定性을 높이기 위해서는 현행 물抽出方法을 溶媒抽出로의 轉換이나 脂肪皮膜 處理에 의한 吸濕物性을 改善함이 바람직할 것으로 판단된다. To compare the keeping quality of freeze and spray dried red ginseng extract powders(RGEPs) and commercial dehydrated tea products. particle sizes and initial moisture contents of these products were measured, and the relationships between crude fat contents and moisture contents and/or densities were studied.<br/> Particle sizes of RGEPs and commercial dehydrated tea products were below 100 mesh. and particle sizes of freeze dried products were higher than those of spray dried products. Initial moisture contents of freeze and spray dried RGEPs were 3.58% and 4.56%. and those of freeze and spray dried coffees were 2.17% and 3.52%. respectively. Crude fat contents of tang and ssanghwa tea were 4.12% and 0.62%. and densities of tang and ssanghwa tea were 0.89 g/ml and 0.59 g/ml, respectively. Absorption rates of tang and ssanghwa tea were the lowest among these products, it was considered because of crude fat contents of tang and ssanghwa tea were higher than these of the other products, and densities of tang and ssanghwa tea were higher than these of the other products. Notwithstanding absorption rates of RGEPs were lower than those of coffees. to maintain lower keeping quality of RGEPs than that of coffees, it was considered that RGEPs are not only lower to coffees in crude fat contents but also in densities. A sinificant relationships were found between keeping quality and crude fat content and/or density.