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김상수,안종일,한보섭,Kim, Sang-Su,An, Jong-Il,Han, Bo-Seop 한국결정학회 1990 韓國結晶學會誌 Vol.1 No.2
1,3-Diazatricyclo (5.2.1.O5.10) decade-2,4dione, C8H10N2O2의 단위세포 상수는a=6.585(7), b=9.089(4), c=12.937(10)A, β=95.72(5)˚, V=770.43, Dc=1.4391c0, 1=1.Ocm-1,7 =295 ˚K, 공간군은 P21/n이고 단사 정계이며 Z =4이 다. λ(Mo K u ) =0.7093A을 사용한 698개 의 회절 반점에 대한 최종 신뢰도 R값은 0.037이다. 본 화합물은 N1-(w-butenyl)uracil의 분자내 (2+2) 광고리화 반응 생성물이며, (5.1. 2.O5.10) tricyclic 계에 속한다. Inversion symmetry에 의해 관련된 한 쌍의 분자들은 uracil 부분의 02와H3간 의 강한 수소 결합을 하고있다 1,3-Diazatricyclo (5.2.1.Os .to) decane-2,11-dione , C8H10N2O2. MW=166.15, Monoclinic, P2/n a= 6.585(7) , b=9.089(4), c=12.937(10)A, β=95.72(5)˚, V=770.4A3, Z=4, Dc=1.43(4) g/cm3, λ (Mo Ka)=0.7093A, r=1.Ocm-1, T=295˚K, final R=0.037 for 698 unique observed reflections. The compound is the product of the intramolecular (2+2) photocycloaddition of Nl-(w-butenyl)uracil and belongs to a (5.2.1.O5.10) tricyclic system. A pair of molecules related by the inversion symmetry are held together by the strong hydrogen bonding interactions between 02 and H3 of the uracil moiety.
졸-겔 법으로 성장시킨 Nb가 첨가된 Bi<sub>4</sub>Ti<sub>3</sub>O<sub>12</sub> 박막의 미세구조와 전기적 성질
김상수,장기완,한창희,이호섭,김원정,최은경,박문흠,Kim, Sang-Su,Jang, Ki-Wan,Han, Chang-Hee,Lee, Ho-Sueb,Kim, Won-Jeong,Choi, Eun-Kyung,Park, Mun-Heum 한국재료학회 2003 한국재료학회지 Vol.13 No.5
Bismuth layered structure ferroelectric thin films, $Bi_4$$Ti_3$$O_{12}$ / (BTO) and Nb-doped BTO (BTN) were prepared on the Pt(111)/Ti/$SiO_2$/Si(100) substrates by a sol-gel route. We investigated the Nb-doping effect on the grain orientation and ferroelectric properties. $Nb^{5+}$ ion substitution for $Ti^{4+}$ ion in perovskite layers of BTO decreased the degree of c-axis orientation and increased the remanent polarization (2Pr). The fatigue resistance of Nb-doped BTO thin film was shown to be superior to that of BTO, and the leakage current of Nb-doped BTO thin film was decreased about 1 order of magnitude compared with BTO. The improvement of ferroelectric properties with $Nb^{5+}$ doping in BTO could be attributed to the changes in space charge densities and grain orientation in the thin film.
김상수,배우석,이종규,Kim, Sang-Su,Bae, Woo-Seok,Lee, Jong-Kyu (사)한국토질및기초기술사회 2006 기술발표회 Vol.2006 No.-
Segmental Grid Retaining Wall is one of the segmental grid retaining walls using headers and stretchers to establish the framework of the wall In this method, grids formed by the intersection of headers and stretchers are generally filled with the gravel to maintain the weight of the wall Therefore, the construction can be carried out with higher speed and much economically when compared with the concrete retaining wall Furthermore, it has high drain capacity, and environmentally friendly aspects also have been pointed out because the possibility of the planting at the front of the wall However, in the segmental grid retaining wall method, the relative movement between the individual headers and stretchers was generally recognized, and stress redistribution in the gravel filling was also observed when subjected to the external loading and self-weight of filling Therefore, it has been thought that the distribution of the earth pressure in the segmental grid retaining wall system differ from that of the concrete retaining wall In this study, the surcharge tests using the scaled model segmental grid retaining wall was carried out to observe the distribution of the earth pressure in the segmental grid retaining wall The earth pressure was measured in the six specified height of wall, and the distribution of the pressure was analyzed. Furthermore, the earth pressure by computation or by the test using the concrete retaining wall was also considered to make comparison
김상수,이준희,남정권,최원영,백남현,박홍규,최민규,김정곤,정광용,Kim Sang-Su,Lee Jun-Hee,Nam Jeong-Kwon,Choi Weon-Young,Back Nam-Hyun,Park Hong-Kyu,Choi Min-Gyu,Kim Chung-Kon,Jung Kwang-Yong 한국작물학회 2005 Korean journal of crop science Vol.50 No.suppl1
호남평야지에서 고품질 쌀 생산을 위한 품종별 적정 수확시기를 검토하기 위하여 $2002\~2004$년에 평야지인 익산에서 조생종인 삼천벼, 중생종인 화성벼, 중만생종인 남평벼를 공시하여 시험을 수행하였는데, 그 결과를 요약하면 다음과 같다. 1. 등숙비율은 삼천벼는 출수 후 $50\~55$일, 화성벼 $55\~60$일, 남평벼 60일 이후수확에서 높았고 현미천립중은 삼천벼는 출수 후 $50\~55$일, 화성벼 55일, 남평벼 $55\~60$일 수확에서 무거웠다. 2. 쌀 수량은 삼천벼는 출수 후 $45\~50$일, 화성벼 $50\~55$일, 남평벼 $55\~60$일 수확에서 많았다. 3. 완전미 수량은 삼천벼는 출수 후 45일, 화성벼 50일, 남평벼 $55\~60$일 수확에서 많았다. 4. 따라서 호남평야지에서 완전미 수량, 쌀 품위, 단백질 함량, Toyo 식미치 등을 고려한 수확적기는 삼천벼는 출수 후 52일(적산온도 $1,213^{\circ}C$), 화성벼는 출수 후 56일$(1,221^{\circ}C)$, 남평벼는 출수 후 60일$(1,207^{\circ}C)$경으로 생각된다. The characters associated with the rice quality and the factors as the proper harvesting time of rice were examined from 2002 to 2004 at Iksan in Honam plaine area. The rice cultivars tested were Samcheonbyeo (Early maturing one). Hwaseongbyeo(Medium maturing one) and Nampyeongbyeo(Mid-late maturing one). The ripened grain rates were high when the harvesting dates after heading were between 50 to 55 days,55 to 60 days, and 60 days for Samcheonbyeo, Hwaseongbyeo and Nampyeongbyeo, respectively. The yield of rice were higher when harvested 45 to 50 days, 50 to 55 days, and 55 to 60 days after heading for Samcheonbyeo, Hwaseongbyeo and Nampyeongbyeo. The highest yields of head rice were obtained when harvested 45 days after heading, 50 days and 55 to 60 days for Samcheonbyeo, Hwaseongbyeo and Nampyeongbyeo. In conclusion, in Honam plain, taking the head rice production, rice quality level, protein content and palatability of rice into account, the best harvest times were found to be 52 days(accumulated temp. : $1,213^{\circ}C$) after heading, 56 days$(1,221^{\circ}C)$, and 60 days $(1,207^{\circ}C)$, for Samcheonbyeo, Hwaseongbyeo and Nampyeongbyeo, respectively.