• ALGAE
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• 제39권1호
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• pp.51-56
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• 2024

The use of droplet digital polymerase chain reaction (ddPCR) has greatly improved the quantification of harmful protists, outperforming traditional methods like quantitative PCR. Notably, ddPCR provides enhanced consistency and reproducibility at it resists PCR inhibitors commonly found in environmental DNA samples. This study aimed to determine the most effective filter material for ddPCR protocols by assessing the reproducibility of species-specific gene copy numbers and filtration time across six filter types: cellulose acetate (CA), mixed cellulose ester (MCE), nylon (NY), polycarbonate (PC), polyethersulfone (PES), and polyvinylidene fluoride (PVDF). The study used two species of Chattonella marina complexes as a case study. Filtration rates were slower for NY, PC, and PVDF filters. Moreover, MCE, NY, PES, and PVDF yielded lower DNA amounts than other filters. Importantly, the CA filter exhibited the lowest variance (38-39%) and the highest determination coefficients (R² = 0.92-0.96), indicating superior performance. These findings suggest that the CA filter is the most suitable for ddPCR quantification of marine protists, offering quick filtration and reliable reproducibility.

• 패션비즈니스
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• 제20권2호
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• pp.124-133
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• 2016

Currently the fashion industry is developing to create a novel culture due to the very sensitive and knowledge-oriented advancement of the IT industry. With fast turnover of information, consumers have come to have a more diverse desire for purchasing. Cubical expression techniques, which empathizes formativeness, can be a creative expression method adjusting into the trend of this era. Along with functional aspects of consumers, even in a textile manufacturing sector, new materials are required to meet sensitive and emotional aspects. Consumers' desire for new and creative designs and the development and adoption of new materials are essential to meet their emotions. The IT industry and fashion industry are forced to combine and a 3D apparel CAD system has been developed, enabling virtual clothing to be represented within a computer virtual space. All processes such as design, pattern creation, sewing and simulation are possible in 3D level. Digital clothing can shorten the production process time and is very effective in that it can reduce clothing waste generated during the sample production. This paper reviewed the works of Dutch designer, Iris van Herpen, who has developed formative designs. She tries to build, construct, and sculpt employing diversified materials other than soft textile materials, as shown in her series of fashion shows. The materials include films, 3D printed polymers, stiff and sheer organza, and artificial leather textiles. A few characteristics of her works have been selected in order to prepare patterns exhibiting the traits. The paper further focused on the physical features of the textile materials used to express similar techniques and its various forms were reviewed.

• 정보학연구
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• 제10권3호
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• pp.1-14
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• 2007

We have studied the methods to connect homes with a digital network and apply home automation to education. We presented the possibility of integrated education where public education at school can be extended to home. The hardwares related with home automation are continuously in development. We have demonstrated the materials appropriate for the levels of individual students with home network information, and studied methods of education.

• Imaging Science in Dentistry
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• 제46권4호
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• pp.239-244
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• 2016

Purpose: The aim of this study was to investigate the use and acceptance of digital radiographic examinations by Brazilian dental practitioners in daily practice and to evaluate the advances that have occurred over the past 5 years. Materials and Methods: Dental practitioners enrolled in extension courses at the Piracicaba Dental School, University of Campinas, Brazil, responded to a self­administered questionnaire in the years 2011 and 2015. They were asked about sociodemographic factors and their knowledge and use of digital radiographic examinations. Descriptive analysis was performed, as well as the chi-square and Fisher exact tests, with a significance level of 5% (${\alpha}=0.05$). results: A total of 181 participants responded to the questionnaire in the years 2011 and 2015. Most of the respondents worked in private practice, had graduated within the last 5 years, and were between 20 and 30 years old. In 2011, 55.6% of respondents reported having ever used digital radiographic examinations, while in 2015 this number increased significantly to 85.4% (p<.0001), out of which 71.4% preferred it to conventional images. Moreover, 21.4% of respondents reported having used digital radiographic examinations for more than 3 years. A significant increase in use of intraoral digital radiography (p = 0.0316) was observed in 2015. In both years, image quality and high cost were indicated, respectively, as the main advantage and disadvantage of digital radiographic examinations. conclusion: This study showed that digital radiology has become more common in Brazil over the past 5 years. Most of the Brazilian dental practitioners evaluated in 2015 used digital radiographic examinations.

• Imaging Science in Dentistry
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• 제43권3호
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• pp.185-190
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• 2013

Purpose: The aim of the present study was to evaluate the measurement accuracy of endodontic file length on periapical digital radiography after application of noise reduction digital enhancement. Materials and Methods: Thirty-five human single-rooted permanent teeth with canals measuring 20-24 mm in length were selected. ISO #08 endodontic files were placed in the root canals of the teeth. The file lengths were measured with a digital caliper as the standard value. Standard periapical digital images were obtained using the Digora digital radiographic system and a dental X-ray unit. In order to produce the enhanced images, the noise reduction option was applied. Two blinded radiologists measured the file lengths on the original and enhanced images. The measurements were compared by repeated measures ANOVA and the Bonferroni test (${\alpha}=0.05$). Results: Both the original and enhanced digital images provided significantly longer measurements compared with the standard value (P<0.05). There were no significant differences between the measurement accuracy of the original and enhanced images (P>0.05). Conclusion: Noise reduction digital enhancement did not influence the measurement accuracy of the length of the thin endodontic files on the digital periapical radiographs despite the fact that noise reduction could result in the elimination of fine details of the images.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제6권3호
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• pp.288-298
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• 2000

디지털 자산이란 이미지, 오디오, 비디오 등과 같이 디지털화된 형태로 존재하는 멀티미디어 정보를 의미한다. 디지털 자산은 저장에 요구되는 방대한 저장 공간 및 자산의 내용 표현에 요구되는 다차원적 정보 특성과 같은 특징들로 인하여, 효율적인 관리를 위한 많은 노력이 필요하다. 본 논문에서는 디지털 자산을 효과적으로 관리하기 위한 디지털 자산 관리자를 구현하였다. 개발된 디지털 자산 관리자는 디지털 자산 중 가장 복잡도가 높은 비디오 자산을 주요 관리 대상으로 하며, 다양한 디지털 자산 관련 응용 환경 중 디지털 컨텐츠 저작을 주요 응용으로 가정한다. 디지털 자산 관리자는 비디오 자산에 대한 효과적인 접근을 위해 계층 구조 모델에 기반을 둔 자산 관리 기능을 제공하고, 저장 시스템과의 독립성을 최대한 보장하며, 빠른 내용 기반 유사성 검색 기능을 지원한다.

• 정보교육학회논문지
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• 제22권6호
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• pp.711-721
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• 2018

인공 지능 기술의 발달과 소프트웨어 중심 사회로의 변화로 누구나 접근 가능할 수 있으며 안정적이고 지속 가능한 다양한 오픈 콘텐츠 속에서 어떻게 접근, 이해, 활용하고, 또한 새로운 오픈 콘텐츠를 어떻게 만들고 공유하는지에 대한 디지털 리터러시 교육의 필요성이 제기되고 있다. 이러한 시점에서 본 논문은 디지털 리터러시를 데이터, 도구, 장치 요소에 대한 각각 하위의 리터러시 개념인 컴퓨터 리터러시, ICT 리터러시, 정보 리터러시로 계층화하고 인지적 능력과 비인지적 능력을 포함하는 개념으로 정의하였다. 또한 오픈 콘텐츠는 OER(Open Educational Resource)과 Open Access 운동과 같이 누구나 자유롭게 사용하고 공유할 수 있는 교수-학습 자료로 정의하고, 두 정의를 기반으로 한 디지털 리터러시 요소 활용 방안으로 디지털 리터러시 교육을 위한 3단계 전략을 마련하여 디지털 환경에서 오픈 콘텐츠를 선정하고, 다음으로 디지털 리터러시 교육 방안을 제시하며, 마지막으로 디지털 리터러시 역량을 함양하기 위한 교육 활동을 실시하는 교육 프레임을 제시하였다.

• 디지털산업정보학회논문지
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• 제11권3호
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• pp.145-158
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• 2015

Disposable marine product packaging materials such as wooden, Styrofoam, and corrugated cardboard boxes have a very low reuse rate, thus causing the logistics costs to rise and making it difficult to establish a unit load system for marine products. Disposable packing containers to be discarded are accompanied by resource and environmental issues home and abroad. Transportation vehicles for marine products have to return empty without loading different kinds of products after delivery due to the smell and properties of marine products, thus posing as an obstacle to logistics rationalization. In an effort to overcome those limitations, this study examined the stages of transportation including "producer-wholesale market in the producing area-commission merchant-wholesale market in the consumption area-commission merchant-quasi-wholesale market-consumer" and also analyzed the utilization and distribution of disposable packaging materials currently used in the circulation of marine products including wooden, Styrofoam, and corrugated cardboard boxes. Based on the analysis results, the investigator developed a logistics rationalization model capable of promoting semi-permanent reuse and lowering empty vehicle rate on return routes as an alternative to address environmental issues caused by disposable packaging materials, which have been an obstacle to the logistics rationalization of marine products, packaging costs in the process of repeating packing and unpacking at each stage of marine products circulation, and empty vehicle rates on return routes after marine products delivery.

• 한국도서관정보학회지
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• 제40권4호
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• pp.177-198
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• 2009

국내 도서관은 정보화 시대에 적응하기 위하여 이용자에게 컴퓨터 사용환경을 일찍부터 제공하였다. 하지만 오늘날은 컴퓨터 사용환경이 일반화되어 전자정보실에 대한 변화가 필요한 시점이다. 이에 문헌정보학과 학생 78명으로 하여금 직접 전자정보실을 이용해 보게 하여 이용에 편리한 점과 불편했던 점을 기술하게 하였다. 이용사례 결과를 분석하여 전자정보실의 바람직한 변화 방향을 찾고자 하였다. 그 결과 사서에 의해 제공되는 정보서비스에서 불만이 가장 많았고, 그 이외에 시설과 장비 그리고 공간 순으로 많았다. 이를 개선하기 위한 방안으로는 도서관에서 전자정보실의 기능을 명확히 하는 미션과 서비스 방향을 정확히 제시하여야 하고, 사서는 전자정보실이 디지털 자료와 아날로그 자료 그리고 정보통신 기술지원이 동시에 제공되는 현대화된 레퍼런스 룸으로 인식해야 할 것이다.

• 한국디지털건축인테리어학회논문집
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• 제13권4호
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• pp.25-32
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• 2013

The green building is one of biggest factors to go the goal of energy saving and environmental conservation, reduction of energy consumption, friendly energy technology, recycling of resource, and environmental pollution reduction technology. The purpose of these green buildings realized by the energy-saving technology such as the exterior materials or curtain wall system. The curtain wall system is a element that come to insulated portions of building envelope that results in heat loss. The purpose of this paper is to carried out mock-up tests for exterior wall used in autoclaved lightweight concrete panels in green building practices. Mock-up test execute a mixed process between standard test procedure and complex test procedure based on AAMA 501(American Society for Testing and Materials) and ASTM 283, ASTM 330(American Society for Testing and Materials). In results, tests meet the requirements that grant values in steps of procedures provided on ASTM and AAMA. ALC panel is suitable for a exterior wall product to be gratified thermal cycling performance and structural capacity, deflection(H/200) and lateral displacement(H/50), for curtain walls.