타이타니아의 졸젤 합성 중 수열처리에 의한 광촉매적 성질 변화 연구

학위논문(석사) - 한국과학기술원 : 화학공학과, 2001.8, [ viii, 70 p. ]The effect of hydrothermal treatment on the photocatalytic properties of titania and silica embedded titania synthesized by sol-gel process was investigated. The characterization of the prepared catalyst was carried out with XRD, TEM, SEM, FT-IR, $N_2$ Adsorption and ESR study. The photocatalytic activity of titania catalysts was investigated for the degradation of 4-chlorophenol whose concentration was measured by HPLC with UV detector. The transition from anatase phase to rutile phase was suppressed by hydrothermal treatment. When silica was embedded in titania, there was a significant decrease in the density of surface hydroxyl group, whose distributions, however, were not affected by hydrothermal treatment. It was observed that hydrothermal treatment seemed to induce the formation of paramagnetic species such as $Ti^{3+},ㆍO_2^-$ on titania surface. Hydrothermally treated sol-gel titania showed a better photo-catalytic activity for the degradation of 4-chlorophenol than the sol-gel titania without hydrothermal treatment. It was also confirmed that the incorporation of silica into titania increased the photocatalytic activity. Even if the anatase phase was believed to have a better photocatalytic activity, the rutile phase formed by calcining the hydrothermally treated sol-gel titania at a higher temperature showed no less photocatalytic activity than the anatase phase formed at a lower temperature. The enhancement of anatase phase and the formation of the active paramagnetic species by hydrothermal treatment were responsible for the greatly enhanced photocatalytic activity.한국과학기술원 : 화학공학과

A study on the factors affecting R&D researchers' empowerment and its outcomes

학위논문(석사) - 한국과학기술원 : 테크노경영대학원, 1998.2, [ iv, 130 p. ]한국과학기술원 : 테크노경영대학원

A study on the way to use VAR as a tool of risk management

학위논문(석사) - 한국과학기술원 : 테크노경영대학원, 1998.2, [ iv, 58 p. ]한국과학기술원 : 테크노경영대학원

온라인 커뮤니티 의식과 작동원리 : 커뮤니티 특성, 활동, 성과 간의 연계에 관한 연구

학위논문(박사) - 한국과학기술원 : 경영공학전공, 2003.2, [ viii, 142, [16] p. ]Thanks to readily available Internet access in Korea, virtual communities are multiplying at an unprecedented rate. In-depth understanding of virtual community dynamics is needed to address critical organization and information system issues, such as virtual collaboration, virtual organizations and communities-of-practice (CoPs). This dissertation addresses the behavior and psychological states of individual virtual community members, and explores virtual community dynamics at the community level. First of all, we discuss the concept of a virtual community. Despite subtle differences in varying definitions, researchers generally agree that "cyberspace" is the essential space for the identification of virtual communities. There are, however, few individuals (if any) that interact in cyberspace alone, and so for the purposes of this study, a virtual community is defined as "a group of people with common interests or goals, interacting predominantly in cyberspace." As such, we can conceptualize and operationalize three principle constructs in virtual community research: "sense of virtual community"(SOVC), which is based on "sense of community"(SOC) and "sense of place"(SOP). Further discussion relates to the commercial value of virtual community stimulation in regards to e-business environments. Based on current research and in-depth interviews with practitioners, we developed an overall theoretical framework for virtual community dynamics, and as a preliminary study analyzed the case of an interest-based virtual community that hosted the interaction of thousands of members in the space of one year. With the theoretical framework somewhat modified by the results of this preliminary study, we developed two research models. In the first study (Study I), we examined the structure of the sense of virtual community at the individual level, and investigated the factors that affected this sense of virtual community. The base of research was a survey of 172 members from 4...한국과학기술원 : 경영공학전공

Study for drug repositioning and target identification ofL-DOPA-induced dyskinesia in Parkinson’s disease

파킨슨병에서 레보도파 유도 이상운동증 치료 약물 및 신규 타겟 후보도출OGM476201

Pharmaceutical Composition for Preventing or Treating Dopamine Induced Dyskinesia comprising Metformin as Active Ingredient

본 발명은 메트포민(metformin) 또는 이의 약학적으로 허용 가능한 염을 유효성분으로 포함하는 도파민 유발 이상운동증의 예방 또는 치료용 약학적 조성물에 관한 것이다. 또한, 본 발명은 메트포민 또는 이의 약학적으로 허용 가능한 염을 유효성분으로 포함하는 도파민 유발 이상운동증의 예방 또는 개선용 식품 조성물 또는 사료 조성물에 관한 것이다.국

Compostion for preventing or treating the Developmental Disability comprising Humulus japonicus extract as active ingredient

본 발명은 환삼덩굴(Humulus japonicus) 추출물 또는 이의 분획물을 유효성분으로 포함하는 발달장애의 예방 또는 치료용 약학 조성물에 관한 것이다. 또한 본 발명은 환삼덩굴 추출물 또는 이의 분획물을 유효성분으로 포함하는 발달장애의 예방 또는 개선용 식품 조성물, 사료 조성물 또는 의약외품 조성물에 관한 것이다.국

Composition for preventing, ameliorating or treating autism spectrum disorder comprising Agathobaculum sp. strain as effective component

국