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A Single Chord Localization Algorithm for Wireless Sensor Networks
Yong-Luo Shen,Yuan Zhang,Yu-Ping Hu,Jun Zhang 보안공학연구지원센터 2015 International Journal of Grid and Distributed Comp Vol.8 No.1
This paper presents a novel range-free single chord localization algorithm with low energy consumption and high accuracy for wireless sensor networks. A mobile anchor node and a mobile reference node are employed to periodically broadcast beacon messages and reference messages, respectively. Each sensor node is equipped with a received signal strength indicator for comparing the signal strength. By using the edge function and the result of comparing signal strength, each sensor node only needs one chord on the communication circle for localization. Compared with previous approaches that require multiple chords, less beacon messages are required by the sensor nodes. In the proposed algorithm, the localization error mainly depends on the move distance interval. However, for the other approaches, large localization errors can be observed according to the angle between chords which may descend the localization accuracy dramatically. Analysis results indicate that the proposed algorithm is superior to other approaches in energy consumption and localization accuracy.
Member capacity-based progressive collapse analysis of transmission towers under wind load
Yong-Quan Li,Yong Chen,Guohui Shen,Wenjuan Lou,Weijian Zhao,Hao Wang 한국풍공학회 2021 Wind and Structures, An International Journal (WAS Vol.33 No.4
The wind-induced collapse of transmission towers has raised many concerns. Progressive collapse analysis is recognized as a promising method for the assessment of the collapse-resistant capacity of the transmission tower. The finite element model of an actual transmission tower is firstly built for the analysis, in which the dynamic behavior of the member in failure is taken into account to be in accord with the actual tower collapse. The analysis considering the main design load cases is conducted in advance to determine the case under which the tower has the potential to collapse. The incremental dynamic analysis in association with the explicit time integration algorithm is employed to perform a progressive collapse analysis, where the wind loads are simulated by using the linear filtering method, and the developed failure criterion with axial force and bending moment involved is based on the stability bearing capacity of the members. It is found the tower collapse begins with the horizontal bracing member near the waist. Then, the adjacent members, including the leg members, fail sequentially, and the tower collapses eventually with a shear-type failure. The demand to capacity ratio (DCR) in terms of bearing capacity of the member is defined to quantify the structural behavior, the location of the member that has the potential to fail, and when the initial failure occurs are thereby identified. It is concluded that compared to the member capacity-based analysis, the ultimate strain-based analysis, which is most likely to be an inelastic dynamic analysis permitting a large deformation, may overestimate the bearing capacity of the structure in wind-induced collapse.
( Yong Shen Li ) 제주대학교 법과정책연구소 2014 국제법무 Vol.6 No.1
경제세계화추세의 계속발전에 따라 상사분쟁도 끊임없이 증가해지고 있다. 국제상사중재는 법원에 의한 분쟁해결보다 신속성, 기밀성, 전문성, 당사자자치 및 국제적 성격의 이점에 따른 유용한 방법으로 널리 활용되고 있다. 중재절차에 있어서 보전조치는 분쟁과 관련 있는 재산이나 증거를 현상태로 우지하도록 하여 중재판정의 최종적인 집행을 가능하게 함으로써 중재제도의 효울성을 제고시키는 중요하고 본질적인 제도이다. 한국 국내입법에 보전조치의 결정권자와 시기에 대한 규정이 두고 있지만 보전조치의 집행에 대해 명확하게 규정학지 않는다. 보전조치는 국제상사중재절차에 있는 중요성에서 보아 한국은 국내입법에서 보전조치에 대한 규정을 개선할 필요가 있다고 생각한다. With the deep development of economic globalization, as intemational commercial disputes become in creasing, intermational commercial arbitration with its convenience has becme an important way to solve the international commercial disputes. Interim measures of prtection have the great significance to guarantee the smooth of the international commercial arbitration proceedings and effective implementation of decisions. A though there are some proceedings and of releasing interim measures of protection in domestic legislation of South Korea, the domestic legislation of South Korea didn`t make clear provisions on enforcement of interim measures of protection. In view of the importance of interim measures in international commercial arbitration, it is necessary for South Korean to perfect the provisions in the interim measures in domestic legislation.
Two New Diterpenoid Alkaloids from Aconitum brachypodum
Yong Shen,Ai-Xue Zuo,Zhi-Yong Jiang,Xue-Mei Zhang,Hong-Ling Wang,Ji-Jun Chen 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.11
Two new diterpenoid alkaloids, N(19)-en-denudatine (1) and N(4)-butanone-flavaconitine (2), were isolated from Aconitum brachypodum Diels.. Their structures were elucidated by comprehensive spectroscopic analyses including UV, IR, MS, 1D- and 2D-NMR.
Two New Diterpenoid Alkaloids from Aconitum brachypodum
Shen, Yong,Zuo, Ai-Xue,Jiang, Zhi-Yong,Zhang, Xue-Mei,Wang, Hong-Ling,Chen, Ji-Jun Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.11
Two new diterpenoid alkaloids, N(19)-en-denudatine (1) and N(4)-butanone-flavaconitine (2), were isolated from Aconitum brachypodum Diels.. Their structures were elucidated by comprehensive spectroscopic analyses including UV, IR, MS, 1D- and 2D-NMR.
Shen, Gui-Nan,Choi, Jung-Ho,Gajulapati, Kondaji,Lee, Jee-Hyun,Kim, Young-Kook,Rho, Mun-Chal,Jung, Sang-Hun,Lee, Kyeong,Han, Sung-Sik,Song, Gyu-Yong,Choi, Yong-Seok Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.5
A series of 2-alkyl or 2-arylthio-5,8-dimethoxy-1,4-naphthoquinones (2-Thio-DMNQ, 5a-s) and 2-alkylamino-5,8- dimethoxy-1,4-naphthoquinones (2-Amino-DMNQ, 6a-k) was synthesized and evaluated for their ACAT inhibitory activities. Among them, the 2-dodecylthio-DMNQ 5l and 2-isobutylamidoundodecylthio-DMNQ 5r showed the most potent ACAT inhibitory activities with $IC_{50}$ value of 22.8 and 24.4 ${\mu}M$, respectively. In a structure-activity relationship study, 2-thio-DMNQs with side chains of carbon number 11 $\sim$ 15 exhibited significant ACAT inhibitory activities.
Xue-Yong Zhang,Ying-Na Jian,Hong Duo,Xiu-Ying Shen,Yi-Juan Ma,Yong Fu,Zhi-Hong Guo 대한기생충학ㆍ열대의학회 2019 The Korean Journal of Parasitology Vol.57 No.4
Coenurosis is an important zoonotic helminthic disease caused by the larval stage of the tapeworm Taenia multiceps. This parasite typically infects the brain of the intermediate hosts, including sheep, goat, cattle and even hu- mans. We report a case of T. multiceps infection in a yak confirmed by clinical symptoms, morphological characteristics, and molecular and phylogenetic analyses. The coenurus was thin-walled, whitish, and spherical in shape with a diameter of 10 cm. The parasite species was identified as T. multiceps by PCR amplification and sequencing of the 18S rRNA, cox1 and nad1 genes. Three gene sequences all showed high homology (all above 97%) with the reference sequences from different hosts. Moreover, phylogenetic reconstructions with the 3 published Taenia gene sequences confirmed that the Qinghai yak isolate was closely related to T. multiceps. Although there are advanced diagnosis and treatment meth- ods for coenurosis, early infection is difficult to diagnose. Importantly, the findings of yak infection case should not be ig- nored due to its zoonotic potential.
박용서(Yong Seo Park),김병운(Byoung Woon Kim),김태춘(Tae-Choon Kim),장홍기(Hong Gi Jang),천상욱(Sang Uk Chon),조자용(Ja Yong Cho),江??(Shen Hua Jiang),허북구(Buk Gu Heo) 한국원예학회 2008 원예과학기술지 Vol.26 No.4
참다래의 생리활성 물질에 대한 기초자료 확보측면에서 2007년 11월 5일에 참다래 4품종(‘비단’, ‘대흥’, ‘제시골드’ 및 ‘헤이워드’)을 수확하여 2℃에서 30일간 저장한 다음 과피와 과육의 메탄올 추출물에 대한 생리활성 효과를 조사하였다. 총 페놀함량은 추출물이 2,000㎎・L<SUP>-1</SUP>일 때 과피와 과육 모두 ‘대흥’에서 37.6 및 17.3㎎・L<SUP>-1</SUP>로 각각 많았다. 전자공여능은 추출물의 농도가 1,000㎎・L-1일 때 과피는 ‘대흥’에서 89.3%로, 과육은 ‘비단’에서 22.3%로 가장 높았다. 총 플라보노이드 함량은 추출물의 농도가 2,000㎎・L-1일 때 과피는 ‘대흥’에서 17.1㎎・L<SUP>-1</SUP>로, 과육은 비단에서 9.0㎎・L<SUP>-1</SUP>로 가장 높았다. 아질산염 소거는 추출물의 농도가 1,000㎎・L<SUP>-1</SUP>일 때 과피는 ‘대흥’에서 80.9%, 과육은 ‘제시골드’에서 78.3%로 가장 높았다. Tyrosinase 활성 저해 효과는 추출물의 농도가 1,000㎎・L<SUP>-1</SUP>일 때 ‘제시골드’의 과육이 14.4%로 가장 높게 나타났다. 따라서 참다래는 품종 및 부위에 따라 생리활성에 차이가 있었으며, 전반적으로 아질산염 소거능이 높은 것으로 나타났다. This study was conducted to determine the physiological activities of methanol extracts from the fruit skin and flesh of Korean kiwifruit cultivars ‘Bidan’, ‘Daeheung’, ‘Jecygold’ and ‘Hayward’ which were harvested and stored at 2℃ for 30days. At the extract concentration of 2,000 ㎎・L<SUP>-1</SUP>, total phenol content was the highest in fruit skin and flesh of cv. ‘Daeheung’ by 37.6 and 17.3 ㎎・L<SUP>-1</SUP>, respectively. DPPH radical scavenging activity in 1,000 ㎎・L<SUP>-1</SUP> were very high in the fruit skin of kiwifruit cv. ‘Daeheung’ by 89.0% and in the flesh of cv. ‘Bidan’ by 22.3%. Total flavonoid content in the fruit skin of cv. ‘Daeheung’ at 2,000 ㎎・L<SUP>-1</SUP> was 17.1 ㎎・L<SUP>-1</SUP> and in the flesh of cv. ‘Bidan’ 9.0 ㎎・L<SUP>-1</SUP>. Nitrite scavenging activity in 1,000 ㎎・L<SUP>-1</SUP> showed the highest value in the fruit skin of kiwifruit cv. ‘Daeheung’ by 80.9%, and followed by the flesh of cv. ‘Jecygold’ by 78.3%. Mushroom tyrosinase inhibition activity in 1,000 ㎎・L<SUP>-1</SUP> were highest in the flesh of kiwi fruit cv. ‘Jecygold’ by 14.4%. These results indicate that Korean kiwifruits have a high nitrite radical scavenging activity, though the physiological activity of kiwifruits was affected by variety and regional parts.