Porous Materials: Energy‐Efficient Dehumidification over Hierachically Porous Metal–Organic Frameworks as Advanced Water Adsorbents (Adv. Mater. 6/2012)

Seo, You‐,Kyong,Yoon, Ji Woong,Lee, Ji Sun,Hwang, Young Kyu,Jun, Chul‐,Ho,Chang, Jong‐,San,Wuttke, Stefan,Bazin, Philippe,Vimont, Alexandre,Daturi, Marco,Bourrelly, Sandrine,Llewelly WILEY‐VCH Verlag 2012 Advanced Materials Vol.24 No.6

<P>The energy‐efficient dehumidification over hier‐archically porous metal‐organic frameworks (MOFs) with hydrothermal stability is reported on page 806 by Jong‐San Chang and co‐workers. Their promising water sorption properties lead to a new type of advanced water adsorbents for the effective utilization of low‐grade thermal energy as well as solar energy. These MOFs would be potential alternatives to commercial water adsorbents, which are used for industrial or indoor desiccant applications such as desiccant dehumidifiers/humidifiers, gas dryers, adsorptive air‐conditioning systems, fresh water production, and adsorption heat transformation. </P>

선택적 세로토닌 재흡수 억제제(Selective Serotonin Reuptake Inhibitor, SSRI)가 한국인 알코올의존증 환자의 알코올 갈망행동에 미치는 영향과 성격 유형에 대한 분석

이종섭,박청산,배종훈 건국대학교 의과학연구소 1997 건국의과학학술지 Vol.- No.7

Polycarbonate, PBT, 충격 보강재 등의 이성분계와 삼성분계 블렌드의 기계적 성질 및 유변학 특성

계형산,최종규 목원대학교 자연과학연구소 2002 自然科學 硏究論文集 Vol.11 No.2

본 연구는 Polycarbonate(PC) 와 Polybutylene Terephthalate(PBT)의 블렌드시 충격 보강재의 첨가에 따른 각 조성별 블랜드의 유동성 및 기계적 특성의 변화에 대한 연구이다. 본 연구에서는 치합형 동방향 회전 이축 압출기를 사용하여 조성별 블렌드를 하였고. ASTM에 의거하여 인장, 충격, 굴곡 등의 기계적 특성을 연구하였다. 또한 Capillary rheometer를 사용하여 Shear rate에 따른 점도의 변화와 연화점 및 온도에 따른 유변학적 성질을 분석하였다. 또한 이성분계 블렌드의 기계적 성질을 높이기 위해 부타디엔계 충격 보강재와 폐타이어 분말을 사용하였다. 각 조성별로 살펴본 기계적 특성은 PC/PBT 블렌드에 부타디엔계 충격 보강재를 첨가한 경우 기계적 강도가 증가함을 볼 수가 있었다. 그러나 폐타이어 분말을 첨가한 재료는 폐타이어 함량이 증가할수록 기계적 강도가 급격히 떨어지는 현상을 나타내었다. 각 성분별 연화점은 PC/PBT블랜드가 가장 높았고, 부타디엔계 충격 보강재, 폐타이어 분말의 순서를 나타내었다. 블렌드의 점도를 살펴보면 PC/PBT 블렌드의 점도가 WTP를 첨가한 것의 점도 보다 크게 향상되었으며, 따라서 가공성이 저하 됨을 알수 있었다. 밤면 부타디엔계 충격 보강재를 첨가한 경우의 점도는 PC/PBT 블랜드보다 초기 값은 높으나, 어느정도 Shear가 높아지게 되면 역전이 되는 현상이 나타났다.

재생 폴리에텔렌의 기계적 성질 : 충격 보강재 효과에 대하여

계형산,강경민,박종훈,정융권,이상환 목원대학교 자연과학연구소 2002 自然科學 硏究論文集 Vol.11 No.2

본 연구는 재활용이 가능한 폴리에틸렌 필름 등에 비산회(Fly Ash) 등의 충진재를 사용하여, 신재와 물성을 비교하여 재생 PE의 재활용 가능성 및 사용 가능한 충진재의 종류를 알아보는데 그 목적이 있다. 또한 본 연구에서는 치합형 동방향 회전 이축 압출기(Fully Intermeshing Co-rotating Twin Screw Extruder)를 이용해서 재생 Polyethylene에 비산회 및 다양한 충진재(filler)를 첨가하여 ASTM에 의거하여 충격시편을 만들었고, 각 충진재의 무게비에 따른 충진재 충격 시험을 하였으며 Capillary Rheometer를 이용하여 유변학적인 성질을 분석해 보았다.

웹 기반 분산 시뮬레이터의 구현 및 활용

조경산,김종은 단국대학교 1998 論文集 Vol.33 No.-

We develope a discrete event, object­oriented, distributed and web­based simulation environment in Java, and this allows simulations to be incorporated into web and run in various clients distributedly. We integrated traditional optimistic time­warp strategy and web­based simulation into a powerful simulation modeling class library which is based on distributive characteristics of Web, RMI remote call and object­oriented environments of Java. Simulation library supports reuse, design and implementation of simulation models, and thus permits the creation of simulation programs as Java applets. We validate the simulation environment by applying it to simulating ATM switches.

人口豫測模型에 관한 硏究(1985)

崔鍾碩,申鉉山,姜正求 충남대학교 자연과학연구소 1986 忠南科學硏究誌 Vol.13 No.1

In this paper, the population projection is estimated by the method of extrapolation which is based on logistic curve. It is required that each time interval of input data is one year. But census is not usually done punctually. So we try to use the raw census data and corrected them by appropriate transformation. For the population projection, we use four kinds of data : Model Ⅰ annual report from 1955 to 1985, Model Ⅱ linear correction of inter census population from 1955 to 1985, Model Ⅲ Compound interest correction on inter census population from 1955 to 1985, Model Ⅳ five years moving average correction of all inter census population. Estimation by model Ⅰ is not good because of large error caused from wrong estimation of population between census. We get a low projection model Model Ⅱ P=5,314/(1+1.4904 EXP (-0.050756t)) × 10 exp((4) from the second try, a high projection model Model Ⅲ P=5,429/(1+1.5438 EXP (-0.04973t)) × 10 exp(4) from the third try and a medium projection model Model Ⅳ P=5,379/(1+1.5190 EXP (-0.050392t)) × 10 exp((4) from the fourth try. We can guess at a saturation population and at a demographic transition point by virtue of an estimation of this logistic curve. The saturation population of Korea is estimated as 5,314×10 exp (4) by model Ⅱ in this paper. We have found the fact that the domographic transition point of Korea has been rapidly advancing since 1963.

인슐린 비의존형 당뇨병 환자에서 24시간 혈압 변동 및 요중 알부민 배설량에 관한 연구

주기산,안기완,정종훈,배학연,홍순표 조선대학교 1995 The Medical Journal of Chosun University Vol.20 No.1

Recently, blood pressure(BP) starts to increase in close relationship to development of persistent microalbuminuria in diabetes. Thus, author studied 24-hour BP changes in diabetics compared to the those in nondiabetics and the changes of urinary albumin excretion (UAE) according to 24-hour BP changes in diabetics with microalbuminuria. Twenty-four-hour ambulatory blood pressure monitoring(ABPPM) was performed in 38 NIDDM patients(18 normotensives and 20 hypertensives) and in 37 control subjects without diabetes(18 normotensives and 19 hypertensives) . Also 24-hour ABPM was performed in 38 diabetics (20 microalbuminurit and 18 normoalbuminuric). The analysis of individual recordings allowed us to detect an impaired circadian pattern(the disappearance of the nocturnal BP decrease or a paradoxical BP increase) in 30% of the normotensive and 31% of the hypertensive diabetics. Twenty-four-hour ABPM(night systolic/diastolic ±SD mmHg) was significantly higher in microabluminuric(124.2 ±11.4/75.1±8.2 mmHg) than in normoalbuminuric subject, (114.0±7.6/64.6±6.6 mmHg, p<0.05). This study suggests that not only awaking BP but also especially day-night minimum SBP decrease are highly responsible for the renal impairment in NIDDM patients, unrelation to hypertension. Thus. ABPM reflects the association between UAE and blood pressure in diabetics more precisely than clinical measurements. and a significant correlation exists between rate of increase in Urinary albumin excretion and blood pressure in diabetics.

이산화탄소 산화제를 이용한 탄화수소의 촉매 탈수소화 기술

장종산,박민석,정성화,박상언 한국공업화학회 2003 공업화학 Vol.14 No.6

온실가스로 잘 알려진 이산화탄소의 배출을 줄이기 위한 집중적인 연구가 지난 10년간 진행되었다. 대부분의 연구는 탄소 공급원으로서의 이산화탄소를 다양한 환원제를 써서 촉매반응에 활용하는 것에 집중되었다. 특히 부가가치가 높은 화합물을 얻기 위한 촉매 반응에 있어 이산화탄소의 산소원자를 떼어내기 위해 수소가 사용되어왔는데, 이 수소화 촉매 공정이 상업화되지 못하는 원인은 기존의 수증기 개질 등의 공정에서 제조되는 수소의 비용이 수소화 반응을 거친 최종 생산물의 가격보다 비싸기 때문이다. 따라서 이에 대한 대안으로서 ‘온화한 산화제’ 그리고 산소 전달 물질로서 이산화탄소의 활용이 주목되고 있다. 이산화탄소로부터 기인한 표면 산소은 지방족 탄화수소 뿐만 아니라 방향족 탄화수소의 산화반응에 활성이 있는 것으로 확인되었다. 이러한 접근은 이산화탄소 활용 기술의 새로운 분야를 열 것으로 기대된다. 주목할 것은 최근 이산화탄소가 산화제로 작용하여 에틸벤젠 탈 수소화 반응에 적용될 때 촉매 활성화 함께 스티렌 선택성이 향상되는 것으로 알려졌다. 또한 공정에 사용되는 수증기를 이산화탄소로 대체할 경우 에너지 절감 및 열역학적 평형 전환율이 상승되는 이점을 얻을 수 있다. 본 총설에서는 탄화수소의 산화적인 전환을 위한 이산화탄소 산화제 활용에 대한 시도들에 대해 살펴보겠다. For the mitigation of global warming due to carbon dioxide, catalytic conversions of CO_(2) with hydrogen has been extensively studied for the last decade. Most of studies in this field have been concentrated on the utilization of carbon dioxide as a carbon source through catalytic reduction processes with various kinds of reductants. However, catalytic hydrogenation has confronted with some limitations to be commercialized because of the use of expensive hydrogen as a reductant. As an altermative way, the utilization of CO_(2) as a soft oxidant and an oxygen transfer agent is attracting considerable attention. The oxygen species have been proven to be active in the oxidative conversions of aromatic hydrocarbons as well as aliphatic hydrocarbons. This approach may be expected to open new technology for CO_(2) utilization. In particular, it was found that carbon dioxide plays a role as an oxidant to increase catalytic activity and selectivity to styrene in dehydrogenation of ethylbenzene. In addition, the use of CO_(2) with replacement of steam gave beneficial advantages such as energy saving and increase in equilibrium conversion. In this short review, we attempt to integrate recent efforts on CO_(2) utilization as a soft oxidant for oxidative conversions of hydrocarbons.

선택적 세로토닌 재흡수 억제제(Selective Serotonin Reuptake Inhibitor, SSRI)가 한국인 알코올의존증 환자의 알코올 갈망행동에 미치는

이종섭,배종훈,박청산 건국대학교 의과학연구소 1997 건국의과학학술지 Vol.7 No.-

In our study during 6 weeks, We examined the effect of selective serotonin reuptake inhibitor(SSRI) on the treatment of Korean alcohol dependence patients and analyzed their personality traits for the more effective approach toward therapeutic rehabilitation of them. Results are as followings: 1) Analysis of the results by Obsessive-Compulsive Drinking Scale(OCDS) showed significant decreased effects on alcohol craving behavior of patients with alcohol dependence from 4th week to 6th week in SSRI treatment group compared with placebo group. 2) There was significant decreace of degree of alcohol craving behavior in 6-week SSRI treatment group compared with placebo group in analysis by Likert Scale. 3) Korean alcohol dependence patients showed type I personality traits.

댄스스포츠 선수의 파트너 수준 인식과 자아실현에 관한 연구

윤종국,신동산 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6

The Purpose of this study is to examine relationship between recognition of partner's level and self-realization of dance sports players. For objects of this study, the researcher selected 200 samples using the convenient sampling method among dance sports players who are doing activties as players in 2003 and have won prizes at various domestic and international contests. For measuring instrument, the researcher prepared structured questionnaires based on Previous studies and analyzed collected data through analysis of variables in accordance with study purpose. Each hypothesis was verified at α=.05. According to dance sports players' recognition of partner's skili level, there was partial difference in self-realization That is, according to recognition of partners' skill levels in practice, among all variabies of self-realization realization of ideal aim showed meaningful difference. And in matches, according to recognition of partners' skill levels, ali variables of self-realization (exhibition of ability and development of ability) except for realization of ideal aim showed meaningful difference. In conclusion, we should recognize that self-realization is different according to the recognition of partners' skill levels, and need to persue researches further and to make active efforts for dance sports players as well as their leaders so that they can practice and couch more efficiently.