• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2018.10a
• /
• pp.247-250
• /
• 2018

정부는 국내산 풀사료의 경쟁력을 강화하기 위해 풀사료용 기계장비 및 제조비 등의 지원에 해마다 1,000억 이상의 예산을 사용하고 있다. 이에 수반한 보조금의 공정한 집행을 위한 절차와 서류는 매우 복잡하기 때문에 집행 및 정산에 상당한 행정비용이 발생하여 국내 생산 확대의 걸림돌로 적용하고 있는 실정이다. 또한 풀사료는 생산시점의 환경(습도, 온도 등), 수분함유량, 압축압력, 풀사료 품종 등에 따라 품질이 달라지는데 품질기준이 미흡해 유통활성화에 걸림돌이 되고 있다. 풀사료 생산이력 정보 수집에 필요한 센서, IoT 통신기술 등은 상용화 수준에 도달했으나 풀사료 생산현장에 적용하기 위해서는 풀사료 수확기 등과의 통합이 필요하고, 데이터에 기반한 과학적 정책 입안을 위한 기반 데이터 축적이 필요하다. 이를 위해 본 연구에서는 국내산 풀사료의 생산량 증대 및 유통 활성화를 위한 IoT 기반의 풀사료 생산이력관리 시스템을 개발 중으로, 우선 관리 기준이 되는 표준 데이터를 정립해 DB화(化) 하고, 풀사료 수확현장에서 필요한 데이터를 확보하기 위한 생산이력 생성장치 및 생산이력 수집장치와 이를 IoT망을 활용해 전송하기 위한 생산이력 송신장치를 개발하며 수집된 데이터를 통합 데이터베이스화(化) 하여 다양한 사용자에게 유무선 인터넷을 활용해 정보를 제공하는 웹/앱을 개발 중이다. 개발을 위한 핵심 기술로는 풀사료 수확기에 부착된 다양한 센서에서 생성되는 압력 등의 데이터를 실시간으로 취득하는 기술, 제어용 컨트롤러 설계 기술, 센서 데이터 가공 기술, IoT망을 이용한 실시간 전송 기술, 풀사료 통합 DB 구축 기술, Full Stack JavaScript 기술 등이 있다. 본 시스템를 풀사료 현장에 적용하면 풀사료 현장 조사 시간 및 비용 절감, 풀사료 생산/유통/보조 업무 전반의 효율화 및 투명화, 생산이력제 정착으로 풀사료 온라인 유통 활성화 및 물류비 절감, 센서, 측정장치, 표기장치 판매 및 유지보수 등 농업분야 신규사업 창출이 가능하다.

• Proceedings of the KIPE Conference
• /
• 2019.07a
• /
• pp.168-170
• /
• 2019

본 논문은 효과적인 능동 풀-다운 기능을 위한 새로운 구조의 펄스 파워 모듈레이터를 제안한다. 제안된 능동 풀-다운 방식은 별도의 풀-다운 저항을 사용하지 않고, 펄스 방전 패스에 추가된 다이오드의 역회복 특성을 이용하여 풀-다운 기능을 수행한다. 본 논문에서 사용된 풀-다운 다이오드는 펄스 출력 시에는 정방향 바이어스 상태를 유지하다가, 펄스 출력이 제거되면 비교적 긴 역회복 구간동안 부하의 커패시턴스 성분에 남아있는 에너지가 방전될 수 있는 전류 패스를 제공한다. 이에 따라 제안된 구조의 펄스 모듈레이터는 기존에 제안된 풀-다운 회로에서 발생하는 발열 손실 또는 별도의 복잡한 제어회로와 같은 복잡한 구조의 문제를 보완하고 빠른 펄스 하강시간을 달성할 수 있다. 본 논문에서는 시뮬레이션을 통해 기존에 제안되었던 풀-다운 저항 방식과 풀-다운 스위치 방식, 제안하는 방식을 비교하여 제안된 구조의 성능과 우수성을 분석하였다.

• Korean journal of food and cookery science
• /
• v.14 no.2
• /
• pp.195-200
• /
• 1998

Wheat flour and glutinous rice pastes added Kimchi were fermented at 10$^{\circ}C$ for 14 days. The numbers of total viable microorganisms and lactics were counted. Textural property by compression force and relevant changes in pectic composition were determined. Other physical properties such as color and viscosity of Kimchi juices were evaluated. Regarding the microorganism counts, the total cell counts of all Kimchi samples increased until 5th days but thereafter all decreased during fermentation. The number of lactics showed same tendency in all Kimchi samples. The compression force of control, wheat flour paste added Kimchi (WHFP-Kimchi) and glutinous rice paste added Kimchi (GLRP-Kimchi) decreased up to 72.0%, 77.0%, 66.5% respectively. During fermentation, hot water soluble pectin (HWSP) increased, whereas sodium hexametaphosphate soluble pectin (HXSP) and HCI soluble pectin (HCISP) decreased. The red chromaticity of all Kimchi juices decreased. The viscosity of all Kimchi samples decreased in the order of GLRP-Kimchi, WHFP-Kimchi and control.

• Journal of Conservation Science
• /
• v.24
• /
• pp.67-74
• /
• 2008

The objective of this study was to investigate stability of traditional starch sizes according to time. The properties of wheat flour and fermented whole-wheat flour were studied. And comparison of stiffness, tensile strength, air permeability, whiteness, and surface observation of cotton fabrics sized with wheat flour and fermented whole-wheat flour before and after 12-years were examined. The amylograph data indicated that ISF-W(Isolated starch flour- white) have good pasting properties than NWF(Natural wheat flour) and ISF-B(Isolated starch flour- light brown). The cotton fabrics sized with ISF-W had higher tensile strength and whiteness, and lower stiffness and air permeability than those of NWF as the time takes 12 years. We identified the stability of traditional starch size using scanning electronic micrograph.

• Journal of the Society of Disaster Information
• /
• v.11 no.1
• /
• pp.121-133
• /
• 2015

A classical commercial insurance, which is used widely as the risk management methods for risk transferring and risk financing, includes the factors of interests, gambling and uncertainty, In 1985 Islamic Fiqc Academy declared that the classical commercial insurance violates the Islamic fundamental principles and beliefs, alteratively recommending a mutual insurance and takaful. A basic principle of takaful is the mutual aid in the Islamic community. On the basis of mutual aid, takaful participants (insurance policyholder) establishes the takaful fund, which is cooperation fund by participant contribution. Takaful fund is separated from shareholders' fund, and the profit and loss of takaful fund are responsible for takaful policyholder. Ownership and operation right of takaful belong to the takaful participants. In takaful, takaful company takes a role of agent or management operator. Comparing to the classical insurance, takaful has the rights of profit dividend, voting of executives, access to accounting books etc. which are additional favors for business company or individuals as takaful participants. Business companies and individuals should consider to use takaful to transfer risk and to enjoy takaful's additional advantages.

• Korean journal of applied entomology
• /
• v.54 no.3
• /
• pp.271-274
• /
• 2015

The genus Italochrysa Principi in Korea has been recorded with only one species, I. japonica (McLachlan) so far. Here we report that Italochrysa nigrovenosa Kuwayama is recognized for the first time in Korea. Specific description, a key based on diagnostic characters, and adult and genital images of the species are provided.

• Proceedings of the KIPE Conference
• /
• 2019.07a
• /
• pp.20-22
• /
• 2019

본 논문에서 공통모드 커플드 인덕터(Common Mode Coupled Inducter, CMCI)를 적용한 2단 직렬 위상천이 풀브리지 컨버터를 제안한다. 제안하는 위상천이 풀브리지 컨버터는 고주파수로 동작하며, 높은 입력전압에 대응할 수 있다. 풀브리지를 직렬로 쌓은 구조로 상단 풀브리지 컨버터와 하단 풀브리지 컨버터가 동시에 스위칭 한다. 2차측은 센터텝 정류기를 사용하여 풀브리지 정류기에 비해 다이오드 전압강하가 절반이라는 장점을 가진다. 또한, 변압기에 CMCI를 적용하여 1차측 상단과 하단의 전류 균형을 유지하도록 구성하였다. 제안하는 위상천이 풀브리지 컨버터의 5.8kW급 시제품을 제작하여 그 타당성을 검증하였다.

• Korean journal of food and cookery science
• /
• v.14 no.2
• /
• pp.201-206
• /
• 1998

This study was conducted to determine the changes in the contents of vitamin C and reducing sugars of wheat flour and glutinous rice pastes added Kimchi during fermentation. Kimchi was fermented at 10$^{\circ}C$ for 14 days. Sensory evaluation of various Kimchi samples were also conducted. During fermentation, pH decreased in the order of wheat flour paste added Kimchi (WHFP-Kimchi), glutinous rice paste added Kimchi (GLRP-Kimchi) and control. Total acidity increased in the same order The contents of total vitamin C of all Kimchi samples decreased. Total reducing sugar contents of Kimchi juices from various samples decreased in the order of WHFP-Kimchi, GLRP-Kimchi and control. In sensory evaluation, the red color of Kimchi juice decreased in the order of control>WHFP-Kimchi>GLRP-Kimchi. Off flavor decreased control>WHFP-Kimchi>GLRP-Kimchi. Firmness decreased control> GLRP-Kimchi>WHFP-Kimchi. Sour tate decreased WHFP-Kimchi>Control>GLRP-Kimchi. But there were no significant difference in crispiness, ans salty taste. Overall prefernce decreased GLRP-Kimchi>control>WHFP-Kimchi.

• The Journal of the Korea Contents Association
• /
• v.9 no.1
• /
• pp.89-97
• /
• 2009

The use of database system in application increases day by day. This brought out the DBMS interconnection access problem with rapid increase of the user. To solve these database connection problem, database connection pool has been presented. However, there is much to be desired on user's interconnection access. To improve previous connection pool architecture, we have designed the sub connection pool besides main connection pool in this paper. We defined connection pool broker to manage both main and sub connection pool connection. When main connection pool reached its limitation, connection pool broker transfers a connection from a main connection pool to a sub connection pool. When the interconnection access user increased rapidly, we have proved that the suggested sub pool architecture is more effective on response time by comparing it with other existing DBMS connection pool architectures using simulation.

• Korean Journal of Plant Resources
• /
• v.32 no.4
• /
• pp.344-354
• /
• 2019

In seven species of Korean Asarum, 44 qualitative and 28 quantitative characters were reviewed taxonomically. Among 44 qualitative characters observed in vegetative and reproductive organs, the states of 27 characters were common in all the seven species. Among 28 quantitative characters, five characters have the same values in all the seven species; the number of cataphyll (2-4), leaf (2), calyx lobe (5), stamen (12) and pistil (6). White spots on adaxial surface of leaf (effectively) distinguished A. maculatum and A. versicolor from the other species. Many long soft hairs on abaxial surface of leaf distinguished A. mandshuricum from other species with short hairs. The glandular hairs on inner surface of calyx tube were divided into 2 types, reflecting the taxonomic relationships between the species: Type 1 has non-stalked glandular hairs (A. maculatum, A. sieboldii and A. sp.), and Type 2 has stalked glandular hairs (A. patens, A. versicolor, A. mandshuricum and A. misandrum). The length, shape, colour of calyx lobe and the extent to which the calyx lobe recurves, as well as the diameter and colour of calyx tube throat, were confirmed to be taxonomically valuable. In the case of glandular hair density on the surface of calyx lobe, A. patens with low density and A. sp. with high density were clearly distinct from all the other species with intermediate hair density. Meanwhile, the stylar protuberance length of A. patens (2.9-3.3 mm) was strikingly different from other species (1.4-2.5 mm). Additionally, further examination of the identities of A. yeonbyeonense and A. yeonbyeonense var. viridiluteolum is required.