• 한국융합학회논문지
• /
• 제8권4호
• /
• pp.1-8
• /
• 2017

현대 사회에서 패션 시장의 규모는 해외와 국내 모두 지속적으로 증가하고 있다. 전자상거래를 통해 상품을 구입하는 경우 다른 소비자들이 작성한 상품에 대한 평가 데이터는 소비자가 상품의 구입 여부를 결정하는데에 영향을 미친다. 기업의 입장에서도 상품에 대한 소비자의 평가 데이터를 분석하여 소비자의 피드백을 반영한다면 기업의 성과에 긍정적인 영향을 미칠 수 있다. 이에 본 논문에서는 아마존 패션 상품의 리뷰 데이터를 학습하여 형성된 워드임베딩 공간을 이용하여 사용자의 감성을 분석하는 모델을 구축하는 방법을 제안한다. 실험은 아마존 리뷰 데이터 570만건을 학습하여 형성된 워드임베딩 공간을 이용하여 긍정, 부정 리뷰 데이터의 개수에 따라 총 3개의 SVM 분류기 모델을 학습하는 방식으로 진행하였다. 실험 결과 긍정 리뷰 데이터 5만건, 부정 리뷰데이터 5만건을 이용하여 SVM 분류기를 학습하였을 때 88.0%로 가장 높은 정확도(accuracy)를 나타냈다.

• 한국콘텐츠학회논문지
• /
• 제21권11호
• /
• pp.1-10
• /
• 2021

본 연구는 중고거래 어플리케이션 <당근마켓>의 리뷰텍스트에 나타난 소비자의 인성 함축단어의 사용실태를 분석하였다. 데이터 수집은 2021년 5월로부터 과거 6개월간 서울과 경기권을 대상으로 하였다. 이는 웹 크롤러를 개발하여 무작위 추출 총 1368건을 수집 후, 최종 570건을 전처리하여 사용하였다. 결과는 다음과 같다. 첫째, 제품의 상거래 플랫폼임에도 리뷰텍스트의 48.2%는 소비자의 인성 관련 내용이었다. 둘째, 리뷰 텍스트는 긍정적 반응이 주를 이루며 이는 감사라는 키워드를 기반으로 텍스트 네트워크 구조를 형성하였다. 셋째, 소비자 인성을 함축하는 리뷰 텍스트는 소비자의 '대타적 인성'과' 대내적 인성'으로 그룹화되었고, 이는 플랫폼에서 통합적으로 작용하였다. 결론적으로 인성 관련 요인들이 플랫폼 거래 과정의 상호작용에서 중요한 역할을 함을 확인하였고, 앞으로 플랫폼의 서비스 품질에도 소비자의 인성이 경쟁력으로 작용할 것이므로, 이에 대해 다각도에서 연구되어야 할 것임을 제언하였다.

• Biotechnology and Bioprocess Engineering:BBE
• /
• 제8권6호
• /
• pp.313-321
• /
• 2003

This review summarizes the recent advances in high-density algal cultures in the field of algal biotechnology. Photobioreactor engineering for economical and effective utilization of algae and its products has made impressive and promising progress. Bioprocess engineers have expedited the design and the operation of algal cultivation systems. Many of them in use today are open systems due to cost considerations, and closed photobioreactors have recently attracted a considerable attention for the production of valuable biochemicals or for special applications. For high-density cultures, the optimization of environmental factors in the photobioreactors have been explored, including light delivery, CO$_2$and O$_2$gas transfer, medium supply, mixing and temperature. It is expected that further advanced photobioreactor engineering will enable the commercialization of noble algal products within the next decade.

• 공업화학
• /
• 제25권5호
• /
• pp.437-446
• /
• 2014

비고리 알릴아민 화합물의 이중알코올화 반응은 아미노 다이올 구조를 도입할 수 있는 효율적인 합성법으로 아미노 다이올 구조를 포함하는 다양한 생리활성 천연물의 효율적인 합성에 적용될 수 있다. 본 리뷰에서는 기질 그 자체, 혹은 카이랄 리간드를 이용한 다양한 입체선택적 이중알코올화 반응들을 소개하고 이를 실제 천연물의 합성에 적용한 최근의 반응 결과들을 살펴보고자 한다.

• 한국시스템다이내믹스연구
• /
• 제8권2호
• /
• pp.5-23
• /
• 2007

According to the system dynamics model of this study, if there is a significant network effect on vehicle operating costs, it is difficult to achieve the shift to AFV even in the long term without a policy intervention because the car market is locked in to the current structure. Network effect can be caused by an increasing return to scale in fuel supply sector as well as in maintenance service sector. It is also related to the fact that the reliability and awareness of consumers on new products increases with the growth of the market share of the new products. There are several possible policy options to break the 'locked in' structure of car market, such as subsidy on vehicle price (capital cost), subsidy on fuel (operating cost) and niche management policy. Combined policy options would be more effective than relying on a single policy option to increase the market share of AFV.

• Asian Pacific Journal of Cancer Prevention
• /
• 제14권4호
• /
• pp.2213-2216
• /
• 2013

Recently, use of natural products available from marine sources, and especially algae products, are receiving more attention. Scientific evidence for claimed nutraceutical and therapeutical effects of one such marine algae product, fucoxanthin, is discussed in this paper with a summary of the currently available literature regarding its antioxidant, anti-obesity and anticancer activities. It is safe for use in humans, but as it has poor solubility a nano-suspension mode of delivery may be adopted to improve efficacy of supplments. We conclude from ourliterature review that the marine algae product fucoxanthin has significant antioxidant, anti-obesity and anticancer activity with established mechanisms of action.

• KSBB Journal
• /
• 제26권4호
• /
• pp.293-299
• /
• 2011

PEGylation, the attachment of polyethylene glycol (PEG) to proteins, is currently main technology for improving efficacy of protein drugs. This technology can prolong the plasma half-life, augment the in vivo stability, and diminish the immunogenicity of therapeutic proteins. Therefore, PEGylated proteins have the enhanced therapeutic efficacy and the reduced undesirable effects versus their native therapeutics. Since the first PEGylated protein product appeared on the market in the early 1990s, currently ten PEGylated protein products have been launched. These marketed drug products have proved the applicability and safety of the PEGylation technology. This review presents overview of PEGylation technology and addresses characteristics of PEGylation methods applied for the development of several protein drugs.

• Journal of Forest and Environmental Science
• /
• 제35권4호
• /
• pp.272-280
• /
• 2019

Forest medicinal resources, which constitute one of the non-timber forest products, have been regarded as healthy and highly valued products. To meet the increasing demand of the medicinal resources, it is necessary to improve the propagation methods of medicinal plants. In vitro propagation not only allows an opportunity for propagating plants in large numbers but also allows for enhancing the quality and quantity of the desired functional component of a plant by altering the growth factors, such as medium, carbon source, and plant growth regulators influence plant. There have been several studies of in vitro propagation methods, such as axillary bud culture, shooting, and embryogenesis, on Kalopanax septemlobus, Eleutherococcus sessiliflorus, Hovenia dulcis, and Schisandra chinensis in Korea between from 2000 through 2010. Furthermore, there have been attempts to proliferate callus and plantlets for producing useful natural compounds by using bioreactors. Here, we provide an account of the in vitro propagation methods of medicinal trees in Korea based on a review of several micropropagation studies.

• 농촌지도와개발
• /
• 제9권1호
• /
• pp.11-27
• /
• 2002

The objectives of this study were to categorize agriculture, to analyze perception of sustainable agriculture and to suggest the directions for improving farming practices in Korea. This study was conducted by review of literature and mail survey. The data was collected from 225 purposively sampled agricultural students by questionnaire. Major findings of the study were as follows; 1) According to the respondents, sustainable agriculture may bring positive effects on the betterment of land conservation, water management and animal protection. 2) The respondents expected that the sustainable agricultural practices may diminish the use of agricultural chemicals and increase safe agricultural products. 3) Sustainable agriculture needs more labor power, however, the number of small and middle-size farms in Korea would not be increased. 4) Even though the price of sustainable agriculture products increases, the respondents expected that rural economic condition would not be much improved because of sustainable agriculture. 5) Agricultural students responded that number of farmers in sustainable agriculture would be increased in the future.

• Toxicological Research
• /
• 제29권3호
• /
• pp.165-172
• /
• 2013

Acetaminophen (APAP) known as paracetamol is the main ingredient in Tylenol, which has analgesic and anti-pyretic properties. Inappropriate use of APAP causes major morbidity and mortality secondary to hepatic failure. Overdose of APAP depletes the hepatic glutathione (GSH) rapidly, and the metabolic intermediate leads to hepatocellular death. This article reviews the mechanisms of hepatotoxicity and provides an overview of current research studies. Pharmacokinetics including metabolism (activation and detoxification), subsequent transport (efflux)-facilitating excretion, and some other aspects related to toxicity are discussed. Nuclear factor erythroid 2-related factor 2 (Nrf2)-regulated gene battery plays a critical role in the multiple steps associated with the mitigation of APAP toxicity. The role of Nrf2 as a protective target is described, and potential natural products inhibiting APAP toxicity are outlined. This review provides an update on the mechanism of APAP toxicity and highlights the beneficial role of Nrf2 and specific natural products in hepatoprotection.