• 한국재료학회:학술대회논문집
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• 한국재료학회 2011년도 춘계학술발표대회
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• pp.11.2-11.2
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• 2011

Polymer based organic photovoltaics have attracted a great deal of attention due to the potential cost-effectiveness of light-weight and flexible solar cells. However, most BHJ polymer solar cells are not thermally stable as subsequent exposure to heat drives further development of the morphology towards a state of macrophase separation in the micrometer scale. Here we would like to show three different approaches for developing new electroactive polymers to improve the thermal stability of the BHJ solar cells, which is a critical problem for the commercialization of these solar cells. For one of the examples, we report a new series of functionalized polythiophene (PT-x) copolymers for use in solution processed organic photovoltaics (OPVs). PT-x copolymers were synthesized from two different monomers, where the ratio of the monomers was carefully controlled to achieve a UV photo-crosslinkable layer while leaving the ${\pi}-{\pi}$ stacking feature of conjugated polymers unchanged. The crosslinking stabilizes PT-x/PCBM blend morphology preventing the macro phase separation between two components, which lead to OPVs with remarkably enhanced thermal stability. The drastic improvement in thermal stabilities is further characterized by microscopy as well as grazing incidence X-ray scattering (GIXS). In the second part of talk, we will discuss the use of block copolymers as active materials for WOLEDs in which phosphorescent emitter isolation can be achieved. We have exploited the use of triarylamine (TPA) oxadiazole (OXA) diblock copolymers (TPA-b-OXA), which have been used as host materials due to their high triplet energy and charge-transport properties enabling a balance of holes and electrons. Organization of phosphorescent domains in TPA-b-OXA block copolymers is demonstrated to yield dual emission for white electroluminescence. Our approach minimizes energy transfer between two colored species by site isolation through morphology control, allowing higher loading concentration of red emitters with improved device performance. Furthermore, by varying the molecular weight of TPA-b-OXA and the ratio of blue to red emitters, we have investigated the effect of domain spacing on the electroluminescence spectrum and device performance.

• 디지털콘텐츠학회 논문지
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• 제19권3호
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• pp.513-519
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• 2018

본 연구의 목적은 소셜네트워크서비스 주제에 관한 연구동향을 조사하는 것이다. 연구의 목적을 달성하기 위해서 웹오브사이언스 데이터베이스에서 제목에 'Social Network Service(SNS)'를 포함하는 1994년부터 2016년까지 출판된 논문 초록 308편을 분석 하였다. 본 연구에서는 텍스트마이닝 기법 중에서 최근 많이 적용되는 토픽모델링기법을 활용하였다. 토픽모델링 분석결과 20개의 토픽(신뢰, 지지, 만족 모델, 조직 지배구조, 모바일 시스템, 인터넷 마케팅, 대학생 효과, 의견 확산, 고객, 정보보호, 건강관리, 웹 협업, 방법, 학습 효과, 지식, 개인 이론, 아동 지지, 알고리즘, 미디어 참여, 문맥 시스템)이 도출되었다. 또한 시계열회귀분석 결과 모든 토픽은 상승 추세로 나타났다.

• International Journal of Quality Innovation
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• 제8권2호
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• pp.1-19
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• 2007

Achievement of objectives of education and training is one of significant factors influencing quality of life. Higher education institutions use different work, teaching methods and tools; however they are inadequate in many cases. Today higher education institutions have problems concerning sustention and rise of certain level of education by giving the job for graduates, using of new technologies that help to present, manage, evaluate and control knowledge. The main objectives of quality management system (QMS) at higher education institutions are as follow: to assure continuous improvement of education quality; to demonstrate performance results and relevant facts to the interested parties (customers of college or university, social partners, administrative institutions) showing the abilities of education institution to prepare high qualification specialists that fully correspond to changing requirements of labour market. The QMS at education institutions should be designed as continuous process, considering that the quality of final product is the result achieved in primary processes. The process shall involve all interested parties. Parameters and indicators of education quality can help to analyze the efficiency and effectiveness of existing QMS. The results of quality audits should be also taken into account when designing and implementing QMS at organization. Literature review showed that for the assurance of education quality three different approaches prevail: total quality management (TQM); requirements of quality awards and assessment models; and QMS corresponding to the requirements of ISO 9001 standard. The case study of QMS design and implementation at Vilnius Law and Business College is presented in the paper. The peculiarities, difficulties and obstacles of QMS implementation in the higher educations institutions are analysed in more detail in this article.

• 한국건설관리학회논문집
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• 제7권1호
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• pp.159-167
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• 2006

어떠한 조직 내의 피고용인의 지식을 도출해내고 이를 체계적으로 데이터화시키고 상용화시킨다는 것은 그 기업의 경쟁력을 향상시키는데 있어서 절대적인 요인으로 받아들여지고 있다. 특히, 건설업에 있어서 건설 프로젝트의 대규모적이고 간헐적인 건설 산업 특성상 이러한 활동은 더욱 중요한 요인으로 받아들여지고 있다. 지난 십년동안 눈부신 네트워크 기술의 발달로 건설 회사는 온라인 저장소를 활성하기 위해 지식 경영(Knowledge Management)으로 그 초점을 맞추고 있다. 하지만 회사들은 만약 온라인상의 노력이 회사의 일반적으로 컴퓨터의 사용 없이 습득된 오프라인 지식과 교감되지 않으면 실제적인 투자에 대한 회수가 초기에 기대했던 것 보다 훨씬 더 적다는 것을 깨닫기 시작했다. 따라서 이번 연구의 가장 큰 목적은 한국의 건설 산업에 기반을 두고 있는 대기업을 위한 경험지식 시스템(Lessons-Learned System)의 개념적인 모델의 발전을 위한 토대를 마련하기 위하여 이를 성공적으로 발전시키고 운영하기 위해 먼저 국내건설 대기업의 경험지식 시스템 사용실태 및 현황을 파악하는데 있다.

• 보건교육건강증진학회지
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• 제20권3호
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• pp.91-108
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• 2003

Psychological stress is a growing issue in work stress research because work stressors are closely related to depression； and depression, in turn, decreases organizational effectiveness. Considering such causal relationships of work stress, a comprehensive source to control work stress is needed for worksite mental well-being. This study was conducted to identify how social support at work controlled work stress and which characteristics of social support were effective on work stress reduction. The study participants were 240 workers employed in a public hospital in Georgia, U.S.A self-administered survey was given to employees with their pay slips, and followed by a hospital wide voice reminder for 7 days. Surveys were conducted over a 20-day period. The questionnaires asked about job demands, job control, social support at work, depression, job performance, absenteeism, and demographics. The social support construct was structured on the source of support at work and the kinds of support were provided. Statistical analyses were conducted in the structural equation modeling approach. Social support at work was directly related to high job control, low depression, and high job performance. High score of social support at work were significantly associated with high job control, low depressive symptoms, and high job performance. By source of support, only organizational support was positively related to high job control. Organizational support was more effective than supervisor and coworker support. Any stressors and their outcomes were not differenciated by the kinds of support. This result indicated that job control was influenced more by the source of support than the kinds of support provided at work； and the most efficient source of support was the organization. Organizational support was a strong factor in improving workers" perceived controllability of their jobs from a work stress reduction perspective.tive.

• Biomolecules & Therapeutics
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• 제8권1호
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• pp.78-83
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• 2000

The objective of this study was to prevalidate the Organization for Economic Cooperation and Development's (OECD) rodent uterotrophic assay as a test method for screening of potential endocrine disrupting chemicals (EDCs). This study was conducted exactly as described in the OECD protocol documents. A positive control substance, 17$\alpha$-ethinyl estradiol (EE), was administered daily for three days to ovariectomized (OVX) Sprague-Dawley rats at various doses for determine the dose-response curve. Additionally, a pure antiestrogenic chemical, ZM189, 154 was administered to OVX rats at the same time EE to determine the effectiveness of the material against blocking the estrogenic effects of EE. At higher concentration of EE (10 $\mu\textrm{g}$/kg), a statistically significant difference in body weight gain and food consumption was observed compared to vehicle controls. In uterine responses, EE produced a dose-related increase in uterus weights compared to vehicle control. These increases were statistically significant at the >1.0 $\mu\textrm{g}$/kg doses. However, a similar dose-response relationship was not observed in vagina weight. A comparison of the two groups receiving ZM189,154 (0.1 and 1.0 mg/kg) with 0.3 $\mu\textrm{g}$/kg of EE and the group receiving only 0.3 $\mu\textrm{g}$/kg of EE showed dose-related decreases in uterus weights. However, statistical significance was shown in 1.0 mg/kg of ZM189,154. In conclusion, administration of EE produced a dose-related increase in uterine (wet and blotted) weights. Additionally, the 1.0mg/kg dose of ZM189,154 was effective in blocking the estrogenic activity of EE. These data suggest 3-day uterotrophic assay using OVX rats may serve as a good tool for EDCs screening.

• 한국전자거래학회지
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• 제14권4호
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• pp.315-332
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• 2009

물류 프로세스는 일반적인 비즈니스 프로세스와는 달리, 서로 이질적인 조직이 참여하여 프로세스를 진행한다는 특징을 보인다. 따라서 각 참여조직들 간의 상호작용을 제어하면서 프로세스를 수행하는 것이 필요하다. 프로세스의 실행이라는 측면에서 이를 제어하는 가장 좋은 대안으로 비즈니스 프로세스 관리(BPM) 시스템을 들 수 있으나, 참여조직 간의 프로세스 소유권과 접근 권한 관리 문제와 함께, 현재의 일반적인 상용 시스템들은 참여조직 간의 상호작용을 관리하기 위한 기능을 거의 제공하지 못한다는 문제점을 안고 있다. 또한 RFID 기술 기반의 물류 환경에서, RFID 이벤트의 적용과 처리를 지원하는 물류프로세스 관리에 대한 고려가 미흡한 실정이다. 따라서 본 연구에서는 물류 환경에서 발생하는 다조직 프로세스를 RFID 이벤트 기반의 통제를 위한 새로운 방법론을 제시하고자 한다. Interworkflow(워크플로우 간) 패턴으로 표현되는 참여조직들 간의 프로세스 자동 트리거링(Auto-Triggering)을 위하여 ECA(Event-Condition-Action) 규칙에 복합이벤트(Complex Event)를 활용한 RFID 이벤트 기반의 RFID-based ECA 규칙을 제공한다.

• STI Policy Review
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• 제5권1호
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• pp.75-97
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• 2014

Entrepreneurial financing, such as publicly initiated venture capital or grant schemes, serves as an important policy instrument that aims to bridge the financing gap facing young, innovative businesses, a gap that is mainly due to higher risk and growing uncertainty, and to strategically promote the creation of new ventures through the revitalization of their venture capital industries. This study examines public venture capital initiatives in Australia, Canada, and Sweden, and discovered that all three countries actively foster their venture capital industry through the formation of funds or the provision of tax incentives. It is notable that the majority of financing initiatives heavily depend on supply-side measures rather than demand-driven policies that focus on stimulating private investment in technological innovations and discoveries. This paper discusses in-depth the policy impact of public financing initiatives and their subsequent side-effects raised in the process such as overlapping in funding structure across the country, lack of monitoring and evaluation for feedback, fragmentation across the government ministries and agencies, and competition with the private sector, which may cause inefficiency as a result of public intervention. Financial constraints may arise for many reasons, partly resulting from the lack of investment readiness of young entrepreneurs. This signals a policy shift towards the creation of market-driven demand away from the traditional supply-push approach, and is a grand challenge to policymakers in entrepreneurial financing. Attention is leaning towards the efficiency and effectiveness of these public-financing initiatives in terms of their policy roles. It is worth noting that policy should focus on generating synergy so available resources can be channeled into the early, risky stage of new ventures, working as facilitator to the achievement of an intended policy goal.

• 한국컴퓨터정보학회논문지
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• 제17권10호
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• pp.203-216
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• 2012

현재 조직의 성공적인 운영을 위해서 정보시스템의 중요성은 더욱 증가하고 있으며, 또한 정보시스템 구축에 대한 감리는 감리 의무화에 따라 더욱 확산되고 있다. 그러나 아직까지도 우리나라의 정보시스템 감리는 정보시스템의 다양한 위험에 제대로 대처하지 못하고 있으며, 각종 정보시스템 프로젝트에 대해 감리를 수행하면서 부실 사례가 종종 발생하고 있어 이에 대한 개선 대책이 절실히 필요한 실정이다. 이에 따라 본 논문에서는 국내 대형 SI업체에서 4년간 수행한 정보시스템 감리 프로젝트 및 위험발생 프로젝트 데이터를 중심으로 통계분석을 수행하여 정보시스템 구축 프로젝트의 품질향상을 위하여 개선된 검토항목을 제시하였고, 또한 이를 실제 정보시스템 프로젝트 사례에 적용하여 본 논문의 결과에 대한 실효성을 검증하였다.

• 인터넷정보학회논문지
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• 제15권1호
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• pp.113-123
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• 2014

세계적인 경기불황의 여파로 수많은 기업들은 IT 인프라에 대한 초기 구축비용 및 유지보수비용 부담을 상당부분 경감시킴으로써 비용을 절감하기 위해 클라우드 컴퓨팅 도입을 서두르고 있다. 비교적 보수적인 준정부기관의 경우도 지난 수년간의 선진화 사업으로 인해 유연해진 조직 및 경영구조로 전화하고 있고, 지방이전에 따른 스마트 워크의 필요성으로 인해 클라우드 기반의 스마트워크 서비스에 대한 논의 및 준비가 한창이다. 본 연구는 준 정부 기관에서 조직원들의 클라우드 기반 스마트워크에 대한 선호도, 특징, 성향, 중점사항 등을 조사하여 이를 유형화하여 향후 준 정부 기관의 클라우드 스마트워크 서비스 발전방안을 제시하였다. 준정부기관의 클라우드 기반 스마트워크 서비스는 편리 추구형, 집중력 추구형, 협업 추구형 등 세 가지로 유형화 되었다.