• The Journal of The Korea Institute of Intelligent Transport Systems
• /
• v.8 no.1
• /
• pp.30-36
• /
• 2009

Dedicated Short Range Communication (DSRC) systems in urban areas are used to collect traffic information from vehicles and to provide vehicles with information received from Roadside Equipment (RSE) having a range of 100 meters (m). However, it is not practical to use RSE with a range of 100 m for express highways. In this paper, we expand the standard cell coverage of RSE to 300 m, and adopt fixed relays to cover sites that cannot communicate with the RSE. We demonstrate that the system using the fixed relays is more economical than using only RSE.

• Proceedings of the Microbiological Society of Korea Conference
• /
• 2000.10a
• /
• pp.24-31
• /
• 2000

In order to find out SoxR-reducing system in E. coli, we generated Tn10-insertion mutants and screened for constitutive expression of SoxS in a soxS-lacZ fusion strain. One mutation was mapped in rseB, a gene in rseABC (Regulation of SigmaE) operon. The constitutive soxS-expressing phenotype was due to the polar effect on the downstream gene, rseC. RseC is likely to function as a component of SoxR reduction system because SoxR was kept in oxidized form to activate soxS expression in rseC mutant. RseC is an integral membrane protein with an N-terminal cysteine-rich domain in the cytoplasm. The functionally critical cysteines were determined by substitution mutagenesis. The truncated N-terminal domain of RseC reduced the soxS transcription by $50\%$ as judged by in vitro transcription assay. Currently RseC is believed to be a reducing factor for SoxR. However, the mechanism for the reduction needs further investigation.

• Journal of Korean Society of Transportation
• /
• v.27 no.6
• /
• pp.29-44
• /
• 2009

A variety of research efforts, using advanced wireless communication technologies, have been made to develop more reliable traffic information system. This study presents a novel decentralized traffic information system based on vehicle infrastructure integration (VII). A major objective of this study was also to devise a methodology for determining appropriate spacing of roadside equipment (RSE) to fully exploit the benefits of the proposed VII-based traffic information system. Evaluation of travel time estimation accuracy was conducted with various RSE spacings and the market penetration rates of equipped vehicle. A microscopic traffic simulator, VISSIM, was used to obtain individual vehicle travel information for the evaluation. In addition, the ANOVA tests were conducted to draw statistically significant results of simulation analyses in determining the RSE spacing. It is expected that the proposed methodology will be a valuable precursor to implementing capability-enhanced next generation traffic information systems under the forthcoming ubiquitous transportation environment.

• Korean Journal of Food Science and Technology
• /
• v.27 no.3
• /
• pp.404-413
• /
• 1995

System parameters (extrusion temperature, extrusion pressure, specific mechanical energy, mean residence time) were analysed on three different screw configurations during twin-screw extrusion of wheat bran. Experiments were conducted over a screw speed of $280{\sim}380\;rpm$, feed rate of $22{\sim}38\;kg/hr$ and moisture content of $17{\sim}33%$ using screws assembled with 3, 4, and 5 reverse screw elements (RSE) adjacent to the heating zone of the barrel. Extrusion temperature increased with increasing RSE but it decreased with increasing feed rate and moisture content. Decreasing the filling ratio of the screw resulted in a lower extrusion pressure, and increasing the length of the RSE gave similar results due to the higher temperature and lower viscosity of melted dough. It was also observed that increasing the feed rate and decreasing moisture content resulted in the reduced extrusion pressure. Specific mechanical energy (SME) decreased when the feed rate and moisture content increased, and SME increased when using RSE posses from 3 to 5. Screw configuration posses with 4 RSE yielded the longest RT, and the smaller the die hole, the higher the RT. In contrast, RT decreased when the feed rate increased. With increasing moisture content RT for 3 RSE increased, but that for 4 and 5 RSE decreased.

• Korean Journal of Food Science and Technology
• /
• v.46 no.5
• /
• pp.531-537
• /
• 2014

Common cruciferous vegetables, kohlabi (Brassica oleracea) and radish (Raphanus sativus), contain phytochemicals such as glucosinolates and carotenoids. Therefore, this study investigated the antioxidant and anti-adipogenic effects of kohlrabi sprout extract (KSE) and radish sprout extract (RSE). The total carotenoid and glucosinolate contents of KSE and RSE were $39.50{\pm}0.67$ and $76.73{\pm}2.75mg/g$, respectively. The total glucosinolate contents of KSE and RSE were $2.65{\pm}0.02$ and $8.13{\pm}0.54mg/g$, respectively. The in vitro-antioxidative activities of KSE and RSE were significantly increased in a dose-dependent manner. Furthermore, ${\beta}$-carotene and glucosinolate-enriched KSE and RSE significantly inhibited lipid accumulation and reactive oxygen species production during the adipogenesis of 3T3-L1 preadipocytes. These results suggest that glucosinolate-enriched KSE and RSE, especially RSE, can be used in the treatment of obesity and as a natural source of antioxidants.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2020.11a
• /
• pp.143-144
• /
• 2020

자율운항선박의 등장으로 국제해사기구는 기존 IMO 협약의 개정사항 식별이나 관련 국제협약의 통일해석과 제개정이 필요한 사항을 논의하고 있다. 제105차 법률위원회에서는 MASS 규정식별(RSE) 작업에 대하여 2022년 완료를 목표로 제106차 법률위원회부터 논의하기로 결정한 바 있다. 이와 관련하여 MSC RSE 작업결과와 방법론 개발을 통하여 자율등급, 방법론, 협약리스트, 작업계획 등을 확정할 계획이다. 우리나라에서는 헌법 제6조의 규정에 따라 국제법규는 국내법과 동일한 효력을 가지고 IMO 회원국감사제도에서 회원국이 국제협약을 국내법으로 수용하여 이행하고 있는지를 감사하고 있기에 국제협약이 국내법으로 수용하는 작업이 얼마나 중요한지를 알 수 있다. 이번 연구에서는 IMO 국제협약 RSE 작업을 기반으로 자율운항선박의 자율화 정도구분 및 기술발전단계에 다라 개정소요가 필요한 국내법을 식별하고 비교·분석하여 자율운항선박이 상용화되기 위한 새로운 법안 마련의 필요성을 제시하였다.

• The Journal of The Korea Institute of Intelligent Transport Systems
• /
• v.6 no.3
• /
• pp.174-182
• /
• 2007

There are not many studies on the maintenance and replacement for the ITS equipments. Most of ITS center has no comprehensive regulation on the equipment replacement. This study was focusing on estimation of equipment replacement period and the number of spare parts in stock using the actual failure data of Road Side Equipment (RSE) by Dedicated Short Range Communication (DSRC). The failure data showed a type of bath-tub curves. The data, however, did not fit to any probability distribution curve, which means that the preventive replacement cannot be strongly applied for the RSE. In the aspect of practical strategy, this study suggest that repairing cost and failure frequency be used for decision of replacement of RSE after the 1 or 2 year warrant period. The future study needs to include more RSE failure data as well as other equipments of the ITS.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2020.11a
• /
• pp.145-146
• /
• 2020

현재 IMO에서는 자율운항선박의 상용화를 위해 국제표준 규정 개발을 위한 논의 중이며, 이러한 규정을 개발하기 위한 사전작업으로서 기존 협약을 자율운항선박에 적용하였을 때 발생하는 조치를 식별하기 위한 RSE 작업을 수행하고 있다. RSE 작업은 해사안전위원회(MSC), 법률위원회(LEG) 그리고 간소화위원회(FAL) 별로 각 위원회에서 담당하고 있는 협약들을 대상으로 수행하고 있다. 본 논문에서는 각 위원회별로 수행한 RSE 작업 결과를 기반으로 자율운항선박의 상용화를 위한 국제표준 규정 개발 단계에서 향후 추가적인 논의 및 검토가 필요한 잠재격차 및 주제들을 종합적으로 분석하여 제시하였다.

• Herbal Formula Science
• /
• v.31 no.1
• /
• pp.41-51
• /
• 2023

Objectives : Raphani Semen (Raphanus sativus L.) is known for the various beneficial effects in Korean medicine. This study aimed to investigate the effect of Raphani Semen extract (RSE) against arachidonic acid (AA)+iron-induced oxidative stress in cells. Methods : Ingredients, their target information, oxidative stress liver injury-related proteins was obtained from various network pharmacology databases and software. A hypergeometric test and enrichment analysis were conducted to evaluate associations between protein targets of RSE. The cell viability was assessed by MTT assay, and immunoblot analysis was used to confirm the molecular mechanisms. Results : A compound-target network of RSE was constructed, which consisted of 336 edges between 18 ingredients and 123 protein targets. PI3K-Akt signaling pathway, ErbB signaling pathway, HIF-1 signaling pathway, PPAR signaling pathway, and AMPK signaling pathway was significantly associated with protein targets of RSE. RSE protected HepG2 cells against AA+iron-induced oxidative stress as mediated with AMPK signaling. Conclusion : RSE was found to protect the cells against oxidative stress via the AMPK signaling pathway.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.28 no.6C
• /
• pp.634-647
• /
• 2003

In MPEG-4 FGS (fine granular scalability) video, SE (selective enhancement) function is adopted to enhance the subject quality of the region of interest (ROI). However, it has the problem of excessive bit-rate increase in the enhancement layer. We present a new rectangular region-based SE (RSE) algorithm to significantly reduce the overhead bits resulting from the standard SE. The proposed RSE is based on two new algorithms. The first is to apply the SE function to a rectangular region. By doing so, we can reduce the required bits for describing the selectively enhanced region. The second is to use constrained bit-plane scanning (CBS) to encode bit-planes of the enhancement layer. By using CBS, we can efficiently encode the ALL-ZERO symbols that are generated by applying the SE. It Is shown by simulation that the proposed RSE can provide a good visual quality for the selected rectangular region with significantly reduced overhead bits.