• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.66 no.1
• /
• pp.37-71
• /
• 2021

Rapeseed is a typical winter crop, and its freezing stress tolerance is a major feature for winter survival. Therefore, it is important to comprehend clearly the physical and molecular mechanisms of rapeseed under freezing stress conditions. This study investigates the physical and transcriptome changes of two rapeseed lines, 'J8634-B-30' and 'EMS26', under cold acclimation and freezing temperature treatments. The proline content of 'J8634-B-30' at 5 ℃ increased 8.7-fold compared to that before treatment, and there was no significant change in that of 'EMS26' RNA-sequencing analysis revealed 5,083 differentially expressed genes (DEGs) of 'J8634-B-30' under cold acclimation condition. Among the genes, 2,784 (54.8%) were up-regulated and 2,299 (45.2%) were down-regulated. The DEGs of 'EMS26' under cold acclimation condition were 5,831 genes, and contained 2,199 up-regulated genes (37.7%) and 3,632 down-regulated genes (62.3%). Among them, only DEGs annotated in the cold response-related signaling pathways were selected, and their expression in the two rapeseed lines was compared. Comparative DEGs analysis indicated that cold response related signaling pathways are proline metabolism and ABA (Abscisic acid) signaling. And ICE (Inducer of CBF expression) - CBF (C-repeat-binding factor) - COR (Cold-regulated) signaling were the significantly differentially expressed transcripts in the two rapeseed lines. The major induced transcripts of 'J8634-B-30' induced P5CS (Δ'-pyrroline-5-carboxylate synthetase), which is related to proline biosynthesis, PYL (pyrabactin resistance-like protein, ABA receptor) and COR413 (cold-regulated 413 plasma membrane 1). In conclusion, these result provide a foundation for understanding the mechanisms of freezing stress tolerance in rapeseeds. Further functional studies should be performed on the freezing stress-related genes identified in this study, which can contribute to the transgenic and molecular breeding for freezing stress tolerance in rapeseed.

• Proceedings of the KIEE Conference
• /
• 2009.07a
• /
• pp.217_218
• /
• 2009

본 논문에서는 한국형 에너지관리 시스템(energy management system, EMS)의 프로토타입(prototype) 네트웍 해석 프로그램의 개발에 대해 요약하였다. 2005년부터 수행되어온 한국형 EMS 개발은 2008년 베이스라인(baseline) 개발을 완료한 상태이며 올해부터 프로토타입 개발 및 실증시험을 수행중에 있다. 한국형 EMS 프로토타입 네트웍 해석 소프트웨어는 베이스라인 개발 프로그램의 기능 보강과 더불어 상정사고 해석(contingency analysis), 전압 계획(voltage scheduler) 및 송전가능용량계산(transmission transfer capability)등으로 구성되어 있다. 본 논문에서는 각 개발 프로그램의 개략적 기능을 소개하고 전체적인 프로토타입 시스템의 구성에 대해 요약하였다.

• Journal of Fashion Business
• /
• v.25 no.1
• /
• pp.39-50
• /
• 2021

The purpose of this study was to investigate how wearing calf support and applying of electronic muscle simulation(EMS) affected the ability to balance. In this study, the one leg standing test for static balance and the Y balance test for dynamic balance were used to assess balance. At this time, the pressure of the calf support was different to produce two supporters, and a difference between wearing the support before, after, and after applying EMS was evaluated. Seven men in their 20s with healthy bodies were measured five times each with a five-minute break, taking into account muscle fatigue, and the difference between each variable was analyzed through a follow-up test using nonparametric statistical analysis. Studies have shown more difference from supporter B with a more appropriate pressure (mmgh) for increasing balance capability than from supporter A. In addition, it was confirmed that the use of EMS electrostimulation and support before measuring the balance capability resulted in a greater difference. The proper pressure (mmgh) supporters and EMS can increase the ability to balance, and these results can be expected to improve the balance ability of ordinary people in their daily lives.

• Journal of the Institute of Electronics Engineers of Korea TC
• /
• v.41 no.8
• /
• pp.19-26
• /
• 2004

High performance packages must provide excellent transmission characteristics. In face-up ceramic packages, however, parasitic characteristics of bondwires are not negligible at millimeter-wave frequencies. Consequently, the electrical performance of ceramic packages is degraded. In をis paper, we propose a new millimeter-wave ceramic package feed-through having Embedded Metal Sheets (EMS). The package that contains double-bondwire interconnections is analyzed by the FEM (Finite Element Method) and measured from 20 to 50GHz. As a result, the proposed package having Embedded Metal Sheets (EMS) achieved 0.85dB, 0.4dB insertion loss improvement on the conventional and the double bondwires buried in epoxy ( $\varepsilon_{{\gamma}}$/ = 4) ceramic package respectively to 47GHz. This improved ceramic package will be useful for MMICs modules and small ceramic packages developments.amic packages developments.

• Proceedings of the Korean Society of Crop Science Conference
• /
• 2018.10a
• /
• pp.29-29
• /
• 2018

• The Journal of Society for e-Business Studies
• /
• v.9 no.4
• /
• pp.37-51
• /
• 2004

Many B2B electronic markets (EMs) are struggling to survive because they failed to attract enough participants. Thus reaching critical mass of participants is one of the key success factors for various types of EMs. The main purpose of this study is to investigate factors that lead MRO (maintenance, repair, and operating) suppliers to participate in private exchanges (PE), the buy-side EM. This paper introduces the characteristics of the PE according to the classification schemes introduced in previous studies about EM types. Literature is reviewed on suppliers' adoption of inter-organizational information systems focusing on EDI adoptions issues. Data analysis based on incomplete contract theory and the social exchange theory is then presented. The results of this study show that the number of suppliers and subsidy are factors that influence suppliers' participation in PEs. Nonsignificant results relating to trust imply that suppliers who are invited to participate in a PE do not expect their off-line relationships with the buyer to be transferred to the PE.

• Journal of Environmental Impact Assessment
• /
• v.14 no.4
• /
• pp.179-193
• /
• 2005

As the world's attention turns to sustainability and the considerations of cumulative effects, the concept of Strategic Environmental Assessment(SEA) has become more significant and urgent and increasing number of countries and international organizations now undertake some forms of SEA. The term SEA, however, is variously defined and understood; generally it means a formal process of systematic analysis of the environmental effects on development policies, plans, programmes and other proposed strategic actions. This process extends the aims and principles of EIA upstream in the decision-making process, beyond the project level in which major alternatives are still open. There is a shift toward more integrative approaches and greater use of Environmental Impact Assessment (EIA) and Strategic Environmental Assessment (SEA) as sustainability tools in cooperation with Environmental Management System (EMS). Currently, Korea has EIA system and Prior Environmental Review System (PERS) which is different type of SEA as Environment Assessment (EA) system. APEMI IA MODEL integrated following three pillar(refer to attached figure.1) ; First pillar symbolized decision making cycle with planning process. Second pillar symbolized integrated assessment which tying SEA and EIA with specific impacts assessment(eg: social impact assessment, economic impact assessment, health impact assessment etc) in cooperation with EMS. Third pillar symbolized EA best practical procedure of International Association for Impact Assessment(IAIA). Considering the above, we applied new conceptual model(APEMI IA MODEL) into Impact Assessment for better integrated decision-making in KOREA as an alternative IA system(IS IA MODEL A and B refer to attached figure 4, 5).

• Proceedings of the KIEE Conference
• /
• 2015.07a
• /
• pp.235-236
• /
• 2015

전력계통의 오프라인 해석에 가장 보편적으로 사용되는 시뮬레이션 프로그램으로는 PSS/E와 DSATools가 있다. 두 개의 프로그램 모두 PSS/E Raw Data Format을 조류계산을 위한 기본 입력 Data로서 사용하고 있다. Raw Data는 모선 번호를 이용하여 계통의 토폴로지를 구성하고, 전력계통 해석을 수행한다. 오프라인 해석에서는 모선 번호를 이용한 해석이 가능하다. 하지만, 모선 개수가 변하는 실시간 환경에서는 모선 번호 기반의 해석이 어렵다. 본 논문에서는 실시간 환경에서 온라인 DSATools를 이용한 해석이 가능 하도록 설비명이라는 개념을 도입한다. 이 설비명 기반의 온라인 DSATools를 실시간 EMS와 연계를 위한 시스템 구성 및 데이터 종류에 대하여 알아보도록 한다.

• Proceedings of the KIEE Conference
• /
• summer
• /
• pp.1334-1336
• /
• 2004

The existing problems of the Electro-Magnetic Suspension system such as air-gap disturbance, mass variation and actuator/sensor failure are described in amore specific manner. These problem can not be solved by conventional state-feedback and output-feedback control. Extended Kalman Filter is to linearize about a trajectory that is continually updated with the state estimates resulting from the measurements. In this paper, first, the physical properties of the EMS system are described. second, Extended Kalman Filer designed as form appliable EMS system. It is shown that state estimation performance can be obtained with the use of Extended Kalman filter, and that results from simulation, stability analyze.

• Journal of the Korean Institute of Navigation
• /
• v.21 no.4
• /
• pp.29-38
• /
• 1997

Because of the result of a large use of electronic equipments, the occupation density of microwave frequency band is highly increased, and electromagnetic environment is getting more seriously bad. It is sometimes reported that electronic machines are not normally operated on account of the influence of undesired electromagnetic wave, which often gives fatal blow to even human life and thus becomes serious social problems. OATS(Open Area Test Site) is principally used to measure EMI or examine elelctromagnetic emission. Because of various restrictions we often build semi-anechoic chamber which has the function of OATS to measure EMI or EMS other than OATS. If the difference of the site attenuation between semi-anechoic chamber and OATS is within ${\pm}3dB$, the semi-anechoic chamber is recognized as adequate facility to measure EMI or EMS. Accordingly authors evaluate and analyze site attenuation due to absorbent materials, polarization, mutual coupling effects, etc. The calculated and the measured site attenuation in semi-anechoic chamber are compared. As a result good agreement is obtained.