본 연구는 해양 미세조류에서 추출한 물질에 대한 광 발광(Photoluminescence) 측정 및 GC-MS 분석을 통해 유기발광다이오드 소자로 이용 가능한 물질을 탐색하고자 하였다. 국내에서 주로 서식하는 해양 미세조류 14종의 추출물을 분획으로 얻었으며 광 발광 측정 결과, Nitzschia denticula, Navicula cacellata, Nannochloropsis salina 총 3종의 추출물에서 광 발광 반응이 나타났다. 광 발광 반응을 보인 물질의 특성을 알아내기 위해 GC-MS로 분석하였으며, 그 결과 3종의 추출물이 imidazole, purine 및 quinoline기를 가진다는 것을 확인하였고, 이 계열의 물질들이 광 발광에 영향을 주는 것으로 판단된다.

In this paper we describe differential circuit of charge pump for voltage management systems, their evolution and improvement in design. The systems are powered by solar cells and generate different voltage levels which are suitable for systems on-chip integrated regulator applications. The voltage regulator outputs voltage from low power digital circuit, -2V for memory, and from 2V to 12V for input and output components. The circuits were simulated using LT SPICE software.

According to the generalization of mobile device use in our life, the complexity and diversity of mobile applications are increased, and thus the importance of application test to find faults and errors quickly and easily before release grows. This paper reviews the current automatic testing methodologies for mobile device applications and their element technologies. Also, well-known commercial tools for automatic testing are surveyed and case studies of their recent industry applications in domestic and foreign countries are performed.

The objective of this study is to provide mobile application developers with a standard testing system and service method. By using this testing service, the developers can test the functional performance and quality of their applications from remote sites through Internet. This service standard helps to test applications quickly, easily, and cheaply through the intuitional scenario graphical environment, and becomes a base for constructing a testing system which can be shared by developers, users, and the third parties.

Porous metals are called as a new material of 21th century because they show not only extremely low density, but also novel physical, thermal, mechanical, electrical, and acoustic properties. Since the late in the 1990‘s, considerable progress has been made in the production technologies of many kinds of porous metals such as aluminum, titanium, nickel, copper, stainless steel, etc. The commercial applications of porous metals have been increased in the field of light weight structures, sound absorption, mechanical damping, bio-materials, thermal management for heat exchanger and heat sink. Especially, the porous metals are promising in automotive applications for light-weighting body sheets and various structural components due to the good relation between weight and stiffness. This paper reviews the recent progress of production techniques using molten metal bubbling, metal foaming, gas expansion, hollow sphere structure, unidirectional solidification, etc, which have been commercialized or under developing, and finally introduces several case studies on the potential applications of porous metals in the area of heat sink, automotive pannel, cathod for Ni-MH battery, golf putter and medical implant.

This study was conducted to figure the usage status and satisfaction of food-related smartphone applications by generic characteristics and food purchase attributes of Seoul area workers. The results show that health vitality-oriented group, married compared to single, those with higher eating-out expenses possess more food-related applications (p<0.05). The primary reason for the usage of food-related applications was the need for food-related information (53.7%). The highest application subjects in use were restaurant-related information and recipe information. The real-life aid food-related applications utilized most were also restaurant information (60.7%) and recipe information (28.3%). Health vitality-oriented respondents especially turned out to use nutrition information and food functionality information often (p<0.01), and recipes or calories & diet information usage frequency was higher in women than in men (p<0.001). Restaurant-related information were more frequently used by singles, highly educated, and those with high income and eating-out expenses (p<0.05). Satisfaction of food-related applications was normal (3.06), showing that the satisfactory level is not yet high. Satisfaction regarding purchase attributes showed that the health vitality-oriented group (3.19) was more satisfied compared to other groups (p<0.05), and women (3.16) were more satisfied that men (2.89) were (p<0.05). Inconveniences of food-related applications were highest in usage fee (3.29), simplicity of information (3.28), lack of reliability of information and need for update (3.10). The results of this study implies that various subdivisions of food-related applications users should be implemented; at the same time, food-related applications covering diverse subjects that regard each group's characteristics should be developed in order to utilize food-related knowledge and information as a marketing tool in the food industry; this can efficiently be done by paying attention to the quality of information and updates within applications.

최근 항시적 광역 모니터링이 가능한 위성원격탐사 기술에 의해 산불감시의 효율성이 증대될 것으로 기대되고 있는 가운데, 미국의 Terra, Aqua, GOES (Geostationary Operational Environmental Satellite), 유럽연합의 Meteosat, 그리고 우리나라의천리안위성 및 후속위성도 산불정보의 실시간 제공을 목표로 하고 있다. 본 연구에서는 이러한 위성기반 산불정보를 대민서비스하기 위한 방법의 일환으로 스마트폰 앱을 구현하여, 북한지역을 포함한 한반도 전역의 위성자료로부터 추출한 산불발생여부, 산불탐지 신뢰도, 산불의 방사강도 등의 정보를 DBMS (Database Management System)에서 관리하고, 안드로이드와 iOS 스마트폰을통해 제공하는 서비스의 원형을 개발하였다. 공통적 핵심기능은 HTML5 (HyperText Markup Language 5) 웹페이지로 구성함으로써 상이한 OS (Operating System)의 네이티브 앱과 결합하는 하이브리드 방식을 통해 소스코드의 재사용성과 시스템 확장성을 추구하였으며, 일자별 산불조회, 최근 산불조회, 주변 산불조회 등의 기능을 포함하도록 하였다. 현재는 위성기반 산불탐지 자료가 실시간 제공되지 않아 산불발생의 이력정보를 서비스하도록 구성하였지만, 2010년대 후반 우리나라 기상위성의 산불탐지 자료가 실시간으로 제공될 것이므로, 정부 3.0의 정보공개 흐름과 함께 국민 모두에게 필요한 실시간 산불정보 조회가 가능해질 것으로 예상된다. 본 연구는 위성기반의 실시간 산불정보 앱 개발을 위한 출발점으로서 의의를 가지며, 향후 산불정보 앱은 SNS (SocialNetworking Service) 기반의 빅데이터 마이닝 기술과 연동하는 통합 솔루션으로 구성되어야 그 활용성이 보다 더 제고될 것이다.

The element carbon has been used as a source of energy for the past few hundred years, and now in this era of technology, carbon has played a significant and very prominent role in almost all fields of science and technology. So as an honour to this marvellous element, we humans should know about its various forms of existence. In this review article, we shed light on all possible carbon-allotropes; similarities in their synthesis techniques and the starting materials; their wide range of possible availability; and finally, future perspectives and applications. A brief introduction is given on the types, structures, and shapes of the allotropes of carbon for a better understanding.

Straw board is renewable natural building material with the advantages of green environmental protection, strong applicability. But it hadn't been promoted because of many reasons such as technology and economy. Through the analysis ofthe unique advantages and the recent new cases of straw board buildings in Harbin, and the current obstacles to application. The effective ways and the feasible solutions to promote sustainable straw board buildings are summarized.

Insect cuticle is a complex biocomposite material consisting of three major morphologically distinct layers, the waterproofing envelope, the protein-rich epicuticle and the chitin/protein-rich procuticle. Structural cuticular proteins (CPs) and the polysaccharide chitin are the major components of the exo- and endocuticular layers that comprise the procuticle. During cuticle tanning (sclerotization and pigmentation), CPs are cross-linked by quinones derived from the oxidation of catechols, resulting in hardening of the exoskeleton. However, the factors that lead to synthesis and assembly of cuticular regions with differing mechanical properties are not well understood. To gain a better understanding of the development and differentiation of rigid cuticle, we performed transmission electron microscopic (TEM) analysis of elytral cuticle (highly sclerotized and pigmented forewing) from 2 d-old pupae to 9 d-old adults of the red flour beetle, Tribolium castaneum. In 2-3 d-old pupae, pupal cuticle separated from the underlining epidermal cells (apolysis), and outermost envelope and protein-rich epicuticle begun to form. A numerous horizontal chitinous laminae and vertical pore canals were evident in the procuticle of 4-5 d-old pupae. By one day after adult eclosion, less-compact horizontal chitinous laminae were deposited, followed by block-type cuticular layers with no horizontal laminae were formed by 9 days. These results will lead to a) a better understanding of insect cuticle formation, structure and mechanics, b) the potential for development of novel insect control agents that target cuticle physiology, and c) the production of biomimetic materials with physical properties like those of the insect exoskeleton for use in biomedical or other technological devices. This work was supported by NRF (NRF-2012R1A2A1A01006467).

This paper describes the application method of bumper area defined in the ship domain theory and it is to identify risky sectors in VTS(Vessel Traffic Services) area. The final goal of this work is to develop early warning system providing the location information with high traffic risks in Mokpo VTS area and to prevent the human errors of VTS Officer(VTSO). The current goal of this paper is to find evaluation and detection method of risky sectors. The ratio between overlapped bumper area of each vessels and the summing area of a designated sector, Ratio to Evaluate Risk(RER) r is used as one of evaluation and detection parameter. The usability of overlapped bumper area is testified through three kinds of scenarios for various traffic situations. The marine traffic data used in the experiments is collected by AIS(Automatic Identification System) receiver and then compiled in the SQL(Structured Query Language) Server. Through the analysis of passing vessel‘s tracks within the boundary of Mokpo VTS area, the total of 11 sectors are identified as evaluation unit sector. As experiment results from risk evaluation for the 11 sectors, it is clearly known that the proposed method with RER r can provide the location information of high risky sectors which are need to keep traffic tracks of vessel movements and to maintain traffic monitoring by VTSO.

Materials with appropriate surface roughness and low surface energy can form superhy-drophobic surfaces, displaying water contact angles greater than 150°. Superhydrophobic carbon-based materials are particularly interesting due to their exceptional physicochemical properties. This review discusses the various techniques used to produce superhydrophobic carbon-based materials such as carbon fibers,carbon nanotubes, graphene, amorphous car-bons, etc. Recent advances in emerging fieldssuch as energy, environmental remediation, and thermal management in relation to these materials are also discussed.

In recent days composite bridge decks are increasingly used to new and rehabilitated bridges due to their many advantages such as light weight, high strength, high durability, low maintenance costs and fast installation. To further promote usage of composite bridge decks, the authors have developed decks of new profile having innovative vertical snap-fit connection. Through this development, significant enhancement of constructability and economy are obtained by overcoming the drawbacks of conventional composite decks of tongue-and-groove connection. The paper introduces some research results and notable applications for the developed composite decks of snap-fit connection using for pedestrian bridges. Owing to their considerable advantages of the developed composite decks, increasing number of applications is currently underway in Korea.

본 연구에서는 발아된 녹두 추출물의 항염증 효능 및 화장품 응용에 관한 연구이다. 동일 농도인 250 ㎍/㎖ 에서 산화질소 생성 억제 비교시 발아 녹두 추출물이 가장 높은 억제 효과를 보였다. 또한 수용성 용매에 따른 결과를 비교하였을 때 1,3-부틸렌글라이콜을 사용하고, 5일간 발아시킨 녹두를 추출한 것이 가장 높은 산화질소 억제 효과를 나타내었다. 염증 반응이 많이 일어나는 염모제에 발아 녹두 추출물을 적용한 결과 발아 녹두 추출물을 포함한 염모제가 포함하지 않은 것 보다 높은 산화 질소 억제 효과를 보였다. 따라서 발아 녹두 추출물은 화장품에 자극 완화제와 항염증 소재로 응용이 기대된다.

오염된 식품으로부터 바이러스를 효과적으로 검출하기 위해서는 식품에 부착된 바이러스를 효과적으로 elute시키는 것이 결정적으로 중요하다. 본 연구에서는 채소류에 공통적으로 적용할 수 있는 elution용액을 찾기 위해 폴리오 바이러스를 인위적으로 오염시킨 1가지 엽채류 (깻잎) 와 3가지 근채류 (당근, 양파, 무) 로부터 바이러스 회수율을 조사한 후, 최적의 바이러스 회수조건을 찾기 위해 기보고된 상추와 양배추의 회수율을 함께 분석하였다. 바이러스의 회수율은 식품의 matrix와 사용된 elution용액의 종류에 따라 차이가 컸으나 0.25M threonine / 0.3M NaCl (pH 9.5) 또는 0.25M glycine / 0.14M NaCl (pH 9.5)을 사용하였을 때 6가지 채소 중 5가지로부터 폴리오바이러스를 효과적으로 elute 할 수 있었다. 0.25M threonine / 0.3M NaCl (pH 9.5)를 노로바이러스 검출에 적용해 본 결과 근채류인 당근보다 엽채류인 깻잎으로부터 노로바이러스 GII를 더 잘 검출할 수 있었다. 이 같은 공통 elution용액을 사용할 경우 다양한 종류의 채소류에 오염된 노로바이러스를 포함한 소화기바이러스의 검출을 용이하게 해 줄 것이다.

The purpose of this paper is to analyze the singularity of visual encyclopedia applications which utilize digital images with gameness and storytelling as the center. Due to the popularization of smart devices, visual encyclopedia applications are actively used in education. In the case of the visual encyclopedia applications, while they inherit some features of paperback visual encyclopedia, they make use of interactive features of the smart media. After analyzing information reconstruct method of the visual encyclopedia applications which distinguish between applications and paperback, this paper extracts the characteristics of interactive storytelling. In this process, the analysis of this paper focuses on themes and play elements that have been extended by visual encyclopedia applications through the digital virtual theory which is Vilem Flusser suggested. Therefore, visual encyclopedia applications provide new educational experiences by providing the method of reproduction and configuration of information through the interactive participation of infant, which was limited to intertextual participation in existing paperback visual encyclopedias.