Effects of near-fault loading and lateral bracing on the behavior of RBS moment connections

Qi-Song “Kent” Yu,Chia-Ming Uang 국제구조공학회 2001 Steel and Composite Structures, An International J Vol.1 No.1

An experimental study was conducted to evaluate the effects of loading sequence and lateral bracing on the behavior of reduced beam section (RBS) steel moment frame connections. Four full-scale moment connections were cyclically tested-two with a standard loading history and the other two with a near-fault loading history. All specimens reached at least 0.03 radian of plastic rotation without brittle fracture of the beam flange groove welds. Two specimens tested with the nearfault loading protocol reached at least 0.05 radian of plastic rotation, and both experienced smaller buckling amplitudes at comparable drift levels. Energy dissipation capacities were insensitive to the types of loading protocol used. Adding a lateral bracing near the RBS region produced a higher plastic rotation; the strength degradation and buckling amplitude were reduced. A non-linear finite element analysis of a one-and-a-half-bay beam-column subassembly was also conducted to study the system restraint effect. The study showed that the axial restraint of the beam could significantly reduce the strength degradation and buckling amplitude at higher deformation levels.

Enantioselective Synthesis of <i>anti</i>–<i>syn</i>-Trihalides and <i>anti</i>–<i>syn</i>–<i>anti</i>-Tetrahalides via Asymmetric β-Elimination

Tan, Yu,Luo, Shilong,Li, Dongmei,Zhang, Nan,Jia, Shiqi,Liu, Yidong,Qin, Wenling,Song, Choong Eui,Yan, Hailong American Chemical Society 2017 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.139 No.18

<P>Structural motifs containing contiguous halide bearing stereocenters are common in natural products as well as bioactive molecules. A few successful examples have been reported in the area of asymmetric vicinal dihalogenation of alkenes for accessing dihalogenated products; in this report, an alternative generation method of contiguous halide-bearing stereocenters alpha,beta,gamma,delta relative to carbonyl group in excellent enantioselectivity is proposed by utilizing a Song's oligoEG catalyst-catalyzed asymmetric beta-elimination. According to this methodology, a wide range of anti-syn-trihalides and anti-syn-anti-tetrahalides with high levels of enantioselectivity were synthesized. The synthetic utility of the contiguous halide-bearing stereocenters was demonstrated by several transformations. The results of high-resolution mass spectrometry indicated that the favorable interaction between catalyst and one of the enantiomers of racemic contiguously multihalogenated ketone contributed to the original enantioselectivity of dehydrohalogenation. A deuterium kinetic isotope effect experiment revealed that this beta-elimination reaction proceeds by the E2 mechanism. This strategy opens a new pathway for the asymmetric synthesis of contiguous halide bearing stereocenters of great complexity.</P>

개에서 림프병증의 초음파학적 특징에 대한 증례

송유미,이영원 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2011 動物醫科學硏究誌 Vol.18 No.1

The objective of this report was to compare ultrasonographic features of lymphanderopathy of a case in our hospital to result of previous studies with the hope of identifying predictive parameter that differenciate lymphandenopathy. A 2-year-old male mongrel dog's chief complaints was dyspnea from three weeks ago. On physical examination. Swelling of submandibular and prescapular lymph node was founded. Radiography showed increased radioopacity of cranioventral lung field and widened cranial mediastinal lesion with soft tissue opacity on the thoracic views. And ill-defined mass with soft tissue opacity on the mid-abdomen views was detected. On ultrasonography, short/long axis ratio of prescapular lymph node is 0.74. In deep lymph nodes, short/long axis ratio was respectively 0.56, 0.43, 0.67, 0.61. Irregular contour and hyperechoic perinodal fat were common features. This features are coreespond with sonographic features of malignant lymph node of previous study. Based on cytologic results, lymphoma was diagnosed. Ultrasound provides noninvasive, real-time imaging information of both peripheral and more deeply lymph node.

Immunohistochemical study on the expression of calcium binding proteins (calbindin-D28k, calretinin, and parvalbumin) in the cerebral cortex and in the hippocampal region of nNOS knock-out(−/−) mice

Yu Jin Cho,Jae Chul Lee,Bong Gu Kang1,2,Jaeyeol An,Hyeon Suk Song1,2,Onju Son,Do-Hyun Nam,Choong Ik Cha,Kyeung Min Joo 대한해부학회 2011 Anatomy & Cell Biology Vol.44 No.2

Nitric oxide (NO) modulates the activities of various channels and receptors to participate in the regulation of neuronal intracellular Ca2+ levels. Ca2+ binding protein (CaBP) expression may also be altered by NO. Accordingly, we examined expression changes in calbindin-D28k, calretinin, and parvalbumin in the cerebral cortex and hippocampal region of neuronal NO synthase knockout(−/−) (nNOS−/−) mice using immunohistochemistry. For the first time, we demonstrate that the expression of CaBPs is specifically altered in the cerebral cortex and hippocampal region of nNOS−/− mice and that their expression changed according to neuronal type. As changes in CaBP expression can influence temporal and spatial intracellular Ca2+ levels, it appears that NO may be involved in various functions, such as modulating neuronal Ca2+ homeostasis, regulating synaptic transmission, and neuroprotection, by influencing the expression of CaBPs. Therefore, these results suggest another mechanism by which NO participates in the regulation of neuronal Ca2+ homeostasis. However, the exact mechanisms of this regulation and its functional significance require further investigation.

효율적인 병렬수행을 위한 루프 재구조화 방법

송월봉,박두순,장유숙 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.3 No.3

In this paper we present a new theory of linear loop transformations called Elimination of Data Dependency(EDD). The current framework of linear loop transformation cannot identify a significant fraction of parallelism. For this reason, we presents a method to extract the maximum loop parallelism in perfect nested loops. Our technique is applicable to general loop nests where the dependences include both distances and directions. This theory provides the foundation for solving an open question in complication for parallel machines: which loop transformations, and in what order, should be applied to aceive a particular goal, such as maximizing parallelism. This paper presents an efficient loop transformation algorithm based on this theory to maximize the degree of parallelism in a loop nest. We present the results of experiments that demonstrate that EDD can result in substantial performance improvements.

韓國産 노박덩굴科 藥用植物에 關한 文獻硏究

宋昊埈,金裕鎭 대한본초학회 1996 大韓本草學會誌 Vol.11 No.1

This study aims to survey through literature the origin of Celastraceae (belonging to the class of wild spimach) which grow in nature or are cultivated in Korea. The results of survey can be summarized as follows; 1. The total 40species of wild spinach surveyed consisted of 7 Celastrus, 32 Euonymus, 1 Tripterygium; Euonymus occupies 80% of these species. 2. The wild spinaches of the Korean origin were found to be 3genuses, 40species, among which the herb species occupied about 56% 3. The herb species out of the wild spinaches were 7 ones according to the nomenclature of Korean oriental medicine. They were 24 root species, 20 leaf species. 3 seed species, 20 cortex species, 9 fruit species, 6 exocarpium species, I flora species. Thus it was noticed that radix was the main kind. 4. In view of their traits, they were 10 antife brile species, 5 neutral in nature species and 12 hot-natured species. 5. In view of their dfficacy and following for duplicate nomenclature, they can be classified into 6 heat-clearing and detoxifying herbs, 6 insecticides, 16 expel wind alleviate itching herbs, 8 promote blood circulation hemostatic herbs, I gastrotomic herbs 9 promote diuresis to reduce edema herbs and 1 invigratic herbs. 6. The toxic herbs were lekondung, kijunyu, etc. However, expect lekondung, their toxity was weak and they accounted of 48% of the total herb plants. As discussed above the herb plants account for 56% of the total wild sponaches. Among them the root species are ranked atop. It is conceived that these herb plants should be surveyed more for their clinical efficacy.

안면부, 유방 및 상완부에 발생한 홍반성 루푸스 지방층염 1예

송유근,손두식,명형준,이현정,임중규,김순호,김윤아 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.2

Lupus erythematous panniculitis is a chronic inflammatory disease of subcutaneous fat that occurs in 2-3% of patients with systemic lupus erythematosus. Lupus erythematous panniculitis typically presents with firm, indurated subcutaneous nodules or plaques commonly developed in proximal extremities, trunks, head and neck. Face, breast and upper extremities involvement with lupus erythematous panniculitis has been infrequently reported. We report a case of lupus erythematous panniculitis developed in a 27-year-old female confirmed by histologic features and laboratory findings.

Perovskite 전이금속 산화물 Li_(0.33)Sr_(0.34+x)Sc_(x)Nb_(1-x)O₃, Li_(0.33)Sr_(0.34+x-y)Sc_(x)La_(y)Ta_(1-x)O₃의 Lithium 이온전도 특성

송효경,신유주 가톨릭대학교 자연과학연구소 2003 자연과학논문집 Vol.24 No.-

새로운 비양론적 페로브스카이트(perovskite) 전이금속 산화물 Li_(0.33)Sr_(0.34+x)Sc_(x)Nb_(1-x)O₃, Li_(0.33)Sr_(0.34+x-y)Sc_(x)La_(y)Ta_(1-x)O₃을 고체 합성법으로 고온합성 하였다. 이들은 모두 정방형 구조를 갖고 있으며, 조성에 따라 단위세포와 A-자리 공극의 농도 및 공유결합성의 변화를 보여준다. 이들의 이온전도도는 300-770K 영역에서 AC-impedence 측정법으로 측정되었다. 이들이 상온 전도도는 10^(-5)Scm^(-1)정도를 나타내었고, 온도가 증가하면서 10^(-2)Scm^(-1)정도까지 증가하였다. 이러한 전도도의 변화는 화학결합 특성, 공극율 및 단위세포의 크기와 연관지어 이해할 수 있었다. New non-stoichiomtric perovskite oxides Li_(0.33)Sr_(0.34+x)Sc_(x)Nb(1-x)O₃ and Li_(0.33)Sr_(0.34+x-y)Sc_(x)La_(y)-Ta(1-x)O₃ were directly prepared by solid-state thermal reaction. As prepared samples show the simple cubic structure and a small variation of lattice parameter, the vacancy concentraticn and bond character with the composition. The ionic conductivity were determined around 10^(-5) Scm^(-1) near room temperature but increased up to 10^(-2) Scm^(-1) with temperature. The conductivity behavior has been discussed in relation with the variation of chemical bonding, the vacancy concentration and the effective volume of unit-cell of the lattice.

개에서 이환된 장림프관 확장증 2례

송유미,이영원 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2011 動物醫科學硏究誌 Vol.18 No.1

A 2-year-old intact male Rottweiler (Case 1) presented with chronic diarrhea and weight loss. a 4-year-old intact female Yorkshire terrier (Case 2) had the history of chronic ascites. Common clinicopathologic findings were hypoalbuminemia, hypocalcemia and hypoglobuliemia. Abdominal radiographic finding were ascites. On abdominal ultrasonography, intestinal abnormalities including hyperechoic mucosal striation, thickened wall were detected. In case 1, exploratory laparotomy findings were distended lymphatic vessel and white nodular masses in serosa of intestine. On histopathologic examination, dilated lymphatic vessel in mucosa and inflammation in villi were founded. Based on these results, Case 1 was diagnosed definitely as intestinal lymphangiectasia. Based on ultasonographic findings, Case 2 tentatively diagnosed as intestinal lymphangiectasia and inflammatoy bowel disease. At 14 days after surgery, Case 1 was dead because of respiratory sign. At Case 2, ascites is presently being controlled by using prednisolone, antibiotics.

灌漑用 小溜池의 內容積에 關한 硏究

宋錫銀,周栽洪,李裕根 진주산업대학교 1982 論文集 Vol.20 No.-

Obtained results for study as above are as follows. 1. The unit depth of water of the present state of reservoirs was below 160 millimeter on the average. 2. The frequency of drought happened one time per three years. 3. The ratio of a well irrigated paddy field was less than 40%. 4. When the unit depth of water of reservoirs is at least 300 millimeter, it is regarded as a well irrigated paddy field. 5. If possible technically, when we raise the present state of dam height of reservoirs more than 1 meter, we can store up the irrigation water for somehow 20 days.