• Biotechnology and Bioprocess Engineering:BBE
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• 제9권1호
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• pp.35-40
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• 2004

Ginkgolides (GK) and bilobalide are valuable compounds that belong to the lactone terpene. The contents of these metabolites were determined by HPLC from female and male tree of Ginkgo biloba L. The productivity of G. biloba cells was also compared with the corresponding individual trees. High variations in the ginkgolides and bilobalide were observed from different individuals, plant parts, and cultured cells. The ginkgolides and bilobalide contents were different depending on the plant parts. Callus was obtained from various plant tissues, and NAA was better at callogenesis than 2,4-D in both the female and male trees. The plants and their corresponding cells showed considerable variation in their ginkgolides and bilobalide concentrations. The ginkgolides and bilobalide contents were not correlated with the production between dominant trees and their corresponding cells. Light irradiation enhanced the production of GK-A and GK-B, however, the concentration of bilobalide decreased under dark conditions.

• Fisheries and Aquatic Sciences
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• 제26권10호
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• pp.628-636
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• 2023

Stomach contents of three commercially important species, anchovy (Engraulis japonica), small yellow croaker (Larimichthys polyactis) and yellow goosefish (Lophius litulon) were analyzed to investigate difference of prey between Spring and Fall. Trawl surveys for target fishes were conducted at 12 stations by the RV Tamgu-8 in the Yellow Sea-Korean side in Spring and Fall 2008 as a part of the United Nations Development Programme/Global Environment Facility (UNDP/GEF), Yellow Sea Large Marine Ecosystem (YSLME) survey. Stomach contents of 50 individuals of each species were analyzed to species level of prey, if the number of specimens was more than 50 for each species. Fullness and digestion condition of stomach contents were determined by five and six levels, respectively. In anchovy stomachs, 23 species in Spring and 15 species in Fall were identified, respectively. Stomach contents were mostly occupied by copepods and euphausiids, mostly Euphausia spp., calyptopis in Spring while by copepods and amphipods in Fall. In small yellow croaker stomachs, 23 species in Spring and 11 species in Fall were identified. Stomach contents were mostly occupied by copepods and euphausiids in Spring, but by only euphausiids in Fall. Total 368 yellow goosefish (151 in Spring and 217 in Fall) were captured, but stomach contents only in Fall were analyzed. Most of stomach contents were anchovy with small proportion of Hakodate sand shrimp, Tanaka's snailfish, Pacific cod, and miscellaneous things. The present research unveiled that main food items of plankton feeder were distinctly different by species and seasons in the Yellow Sea-Korean side, as coincided with previous reports.

• 한국산림과학회지
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• 제104권2호
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• pp.193-197
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• 2015

국내 자생 정금나무의 기능성 품종을 육성하기 위하여 4집단 24개체에 대한 열매의 형태적 특성과 안토시아닌 함량을 분석하였다. 분산분석결과 조사된 모든 형질 특성들에서 집단간 및 집단내 개체간에 유의적인 차이가 인정되었다. 정금나무 열매의 평균특성을 살펴보면 열매종경 8.2 mm, 열매횡경 7.8 mm, 열매무게 0.4 g, 열매당도 11.7 Brix., 과지당 열매수 7.7개, 안토시아닌 함량 474.4 mg/100 g으로 각각 나타났다. 특히, 정금나무의 열매특성은 미국산 블루베리에 비해 크기는 작으나 안토시아닌 함량이 1.9배 높은 것으로 나타나 기능성 품종육성을 위한 소재로서의 이용 가치가 높은 수종으로 판단된다. 기능성 품종육성을 위하여 3가지(열매무게, 과지당 열매수, 안토시아닌 함량) 주요 선발기준에 의해 최종 선발된 3개체의 선발효과를 추정한 결과 전체 평균특성과 비교하여 열매무게 129.6%(0.36 g${\rightarrow}$0.47 g), 과지당 열매수 109.5%(7.7개${\rightarrow}$8.4개), 안토시아닌 함량 140.5%(474.4 mg/100 g${\rightarrow}$666.4 mg/100 g)의 선발효과를 추정할 수 있었다.

• 한국경제지리학회지
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• 제22권2호
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• pp.123-140
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• 2019

공감(Empathy)은 타인에 대한 온전한 이해를 통해 타인의 입장에서 그 사람의 감정을 느끼고 이해하고, 반응하는 능력이다. 최근, 개인 간의 관계적 측면에서의 감정적 공감뿐만 아니라 사회를 유지하는 기본 원리로서 공감을 바라보는 '사회적 공감'에 이르기까지 '공감'의 문제가 중요한 화두로 떠오르고 있다. 본 연구는 현대 사회를 움직이는 새로운 동력으로서 공감의 문제에 주목하고, 도시에서 이루어지는 문화적 공감에 대한 공간적 적용으로서 '도시씬(urban scene)'에 주목했다. 도시씬은 도시를 소비의 공간으로 접근하며 도시공간들이 가진 고유한 속성에 따라 분류하고, 그 특징들을 분석한다. 본 연구는 기존의 도시씬 이론을 공감의 관점에서 재접근하고, 새로운 도시 소비의 형태로서 콘텐츠에 반영된 도시이미지를 소비하는 방식으로서 '콘텐츠 투어리즘'의 구체적인 사례를 적용하여 새로운 도시씬으로서 '콘텐츠씬'을 제안하고 그 의미와 가능성을 제시한다.

• International Journal of Contents
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• 제12권3호
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• pp.17-21
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• 2016

The purpose of this study was to obtain qualitative data on Korean-American dry cleaners' concerns about work-related health and safety and their attitudes toward the use of PPE(Personal Protective Equipment). Two focus group discussions were conducted with convenient samples of Korean-American drycleaners in middle-eastern state. A total of 13 individuals participated in two focus groups. Participants had concerns as both owners and workers. As owners, they were concerned mostly about compliance of environmental regulation and economic depression. The participants knew very little about the hazards of chemical exposure and expressed vague concerns about chemical exposure and health. Majority of participants do not use PPE and had no intention of using it in the future because of their limited knowledge about the hazardous nature of chemical exposure. The findings from this study would guide the development of intervention to increase drycleaners knowledge of chemical exposure and use of PPE.

• International Journal of Contents
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• 제18권2호
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• pp.81-93
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• 2022

The purpose of this study was to identify the structural causation between the service quality of lifelong education, city brand equity, and intention to reuse. For this study, the case of lifelong education in Osan, wherein local governments are leading efforts to promote lifelong education, was selected as the subject. A structured offline survey as well as an online survey were conducted to collect data from citizens of Osan who participated in lifelong education at least once. The results show that lifelong education service quality and city brand equity have a significant positive impact on intention to reuse, and that service quality has a significant positive impact on intention to reuse through city brand equity. The significance of this study lies in the revelation of the mediating impact of city brand equity, in the relationship between the service quality of lifelong education and individuals' intention to reuse lifelong education. This study also contributes establishing lifelong education service policies to increase the intention to reuse lifelong education.

• International Journal of Contents
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• 제10권2호
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• pp.42-46
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• 2014

This study suggests a teaching-learning method to improve creative design abilities of students majoring in design. By suggesting a creative design-inducing (CDI) teaching-learning method process and a creative design-inducing (CDI) teaching-learning method, this study aims to expand creative thinking among students with the aim of producing produce creative output as well as improving the effectiveness of design teaching. It also presents a case of the teaching-learning method in a design-related department, the process of teaching where the new method is applied is also examined. The teaching method this study suggests has the following merits: First, it allows the teacher to use various tools depending on the creative thinking abilities of individuals. By providing students with custom-made teaching, the method motivates and focuses students during the lesson. Second, it is easier for students to generate creative ideas than with other teaching methods.

• International Journal of Internet, Broadcasting and Communication
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• 제12권3호
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• pp.56-63
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• 2020

The Avengers film produced by Marvel Comics shows visual effects that were impossible to produce in the past. Companies that produce film special effects were initially equipped with large personnel and equipment, but technology is gradually evolving to be feasible for smaller companies that do not have high-priced equipment and a large workforce. The development of hardware and software is becoming increasingly available to the general public as well as to experts. Equipment and software which were difficult for individuals to purchase before quickly popularized high-performance computers as the game industry developed. The development of the cloud has been the driving force behind software costs. As augmented reality (AR) performance of mobile devices improves, advanced technologies such as motion tracking and face recognition technology are no longer implemented by expensive equipment. Under these circumstances, after implementing mobile-based facial capture technology in animation projects, we have identified the pros and the cons and suggest better solutions to improve the problem.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2016년도 춘계 종합학술대회 논문집
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• pp.243-244
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• 2016

From the viewpoint of ICT-based disaster prevention design, evacuation route planning is one of the hot topics to be solved. Since we have quite a lot of natural disasters these days, its role has become important more and more than before. In order to deal with this tough problem, a genetic algorithm (GA) is adopted, and a revised selection procedure for preserving variety of individuals in each generation is introduced. As a result of some computer simulations applied to Hizen-Hamashuku, one of the model areas in this research project, it is found that the proposed method is effective.

• International Journal of Contents
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• 제16권4호
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• pp.39-49
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• 2020

The goal of this research was to understand the patterns of multidimensional engagement in MOOCs. An email with an online survey link was sent to enrollees in an MOOC course. The survey included 35 questions asking about engagement, teaching presence, and learning persistence. The items were validated in the literature, revised for the MOOC setting, reviewed by four professionals in the field of educational technology, and used in the study. A heterogeneous group of 170 individuals gathered through convenience sampling participated in the study. With cluster analysis of the engagement data, three groups were identified: Cluster1, 2, and 3. Cluster 1 scored high on behavioral, emotional, and cognitive engagement. Cluster 2 scored high on behavioral aspects but low on emotional and cognitive engagement. Cluster 3 scored low on behavioral and cognitive engagement but high on emotional aspects. The study addressed cluster-specific learner characteristics and differences in perceived teaching presence and learning persistence. Design strategies pertaining to each cluster were further discussed. These strategies may guide instructors and practitioners in the design and management of MOOCs and should be further validated through future studies.