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Vehicle Lateral Stability Management Using Gain-Scheduled Robust Control
You, Seung-Han,Jo, Joon-Sang,Yoo, Seung-Jin,Hahn, Jin-Oh,Lee, Kyo-Il The Korean Society of Mechanical Engineers 2006 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.20 No.11
This paper deals with the design of a yaw rate controller based on gain-scheduled H$\infty$ optimal control, which is intended to maintain the lateral stability of a vehicle. Uncertain factors such as vehicle mass and cornering stiffness in the vehicle yaw rate dynamics naturally call for the robustness of the feedback controller and thus H$\infty$ optimization technique is applied to synthesize a controller with guaranteed robust stability and performance against the model uncertainty. In the implementation stage, the feed-forward yaw moment by driver's steer input is estimated by the disturbance observer in order to determine the accurate compensatory moment. Finally, HILS results indicate that the proposed yaw rate controller can satisfactorily improve the lateral stability of an automobile.
Synthesis and Biological Evaluation of Isophthalamide Derivatives as T-type Calcium Channel Blockers
Oh, You-Na,Kim, Yoon-Jee,Seo, Seon-Hee,Lee, Jae-Kyun,Rhim, Hye-Whon,Pae, Ae-Nim,Jeong, Kyu-Sung,Choo, Hyun-Ah,Cho, Yong Seo Korean Chemical Society 2008 Bulletin of the Korean Chemical Society Vol.29 No.10
Oh, You-Chang,Kang, Ok-Hwa,Choi, Jang-Gi,Brice, Obiang-Obounou,Lee, Young-Seob,Keum, Joon-Ho,Kim, Sung-Bae,Shin, Dong-Won,Ma, JinYeul,Jeong, Gi-Hoon,Kwon, Dong-Yeul Informa Healthcare 2011 Immunopharmacology and immunotoxicology Vol.33 No.2
<P>Sinomenine is an alkaloid compound and a prominent anti-allergic agent found in the root of the climbing plant <I>Sinomenium acutum</I>. However, its effects on the bone marrow-derived mast cell (BMMC) mediated allergy and inflammation mechanism remain unknown. In this study, the biological effects of sinomenine were evaluated while focusing on its effects on the allergic mediator in PMA plus A23187-stimulated BMMCs. An investigation was also conducted to determine its effects on the production of several allergic mediators including interleukin-6 (IL-6), prostaglandin D<SUB>2</SUB> (PGD<SUB>2</SUB>), leukotriene C<SUB>4</SUB> (LTC<SUB>4</SUB>), β棺-Hexosaminidase (β棺-Hex), and cyclooxygenase-2 (COX-2) protein. The results revealed that sinomenine inhibited the PMA plus A23187-induced production of IL-6, PGD<SUB>2</SUB>, LTC<SUB>4</SUB>, β棺-Hex, and COX-2 protein. Taken together, these findings indicate that sinomenine has the potential for use in the treatment of allergy.</P>
Aquimarina litoralis sp. nov., Isolated from a Coastal Seawater
You-Sung Oh,Hyung-Yeel Kahng,Young Sun Lee,Byoung-Jun Yoon,Sang-Bin Lim,정재성,Duck-Chul Oh,Dong-Heon Lee 한국미생물학회 2010 The journal of microbiology Vol.48 No.4
A strictly aerobic, red-pigmented, non-motile, catalase- and oxidase-positive, Gram-staining-negative bacterium,designated strain CNURIC011T, was isolated from seawater off the coast of Jeju Island in Korea. A phylogenetic analysis based on 16S rRNA gene sequences showed that strain CNURIC011T belongs to the genus Aquimarina in the family Flavobacteriaceae. 16S rRNA gene sequence analysis revealed that the close relatives of the novel strain are Aquimarina latercula ATCC 23177T, Aquimarina marcrocephali JAMB N27T,Aquimarina intermedia KMM 6258T, Aquimarina muelleri KMM 6020T, and Aquimarina brevivitae SMK-19T,with sequence similarities of 97.6, 96.6, 96.0, 95.6, and 94.2%, respectively. DNA-DNA hybridization revealed that the level of relatedness between strain CNURIC011T and Aquimarina latercula ATCC 23177T (=KCTC 2912T) was 4.9%. The DNA G+C content was 35.8 mol% and the major respiratory quinone was MK-6. The major fatty acids were iso-C15:0 (14.9%), C15:0 (13.9%), iso-C17:0 3-OH (12.6%), iso-C15:1 G (7.3%), and iso-C17:1ω9c (7.2%). On the basis of phenotypic, phylogenetic, and genotypic data, strain CNURIC011T represents a novel species within the genus Aquimarina, for which the name Aquimarina litoralis sp. nov. is proposed. The type strain is CNURIC011T (=KCTC 22614T =JCM 15974T).
Persistence of Chinese Milk Vetch(Astragalus sinicus L.) Seed in Naturally Reseeded CMV-Rice Field
Sang-Yeol Kim,Sung-Hwan Oh,Jong-Hee Lee,Jun-Hyeon Cho,Kuk-Hyun Jeong,Ji-Yoon Lee,Sung-Tae Park,You-Chun Song,Un-Sang Yeo,Jeong-Il Kim,Hang-Won Kang 한국작물학회 2010 한국작물학회 학술발표대회 논문집 Vol.2010 No.04
Field experiments were conducted to investigate persistence of Chinese milk vetch(CMV) seed under naturally reseeded CMV-rice cropping systems during the period of 2007~2009. Persistence of the CMV seeds were evaluated in the naturally reseeded CMV-rice field on different tillage methods and soil depths based on the seed number recovered and the seed longevity in soil. Field observation in the naturally reseeded CMV rice field showed that as many as 917~2,185 CMV seeds m-2 were found from 0~15cm soil depth in the rotary tillage and 250~10,105 CMV seeds in minimum tillage rice cultivation in autumn. The recovered seed germinated 25~33%, 23~43% but still had high percentage of hard seed having 64~72% and 51~77%. Field experiment showed that the CMV seedling still emerged even after 2 years of continuous destructive killing of emerged CMV plant by rotary tillage in naturally reseeded CMV-rice field, indicating that CMV seeds persistent at least two years in rice field.