• 충청수학회지
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• 제1권1호
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• pp.71-76
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• 1988

For each continuous convex function ${\phi}$ defined on an open convex subset $A_{\phi}$ of a Banach space X, if we define a positively homogeneous sublinear functional ${\sigma}_x$ on X by ${\sigma}_x(y)=\sup{\lbrace}f(y)\;:\;f{\in}{\partial}{\phi}(x){\rbrace}$, where ${\partial}{\phi}(x)$ is a subdifferential of ${\phi}$ at x, then we get the following characterization theorem of Gateaux differentiability (weak Asplund) sapce. THEOREM. For every ${\phi}$ above, $D_{\phi}={\lbrace}x{\in}A\;:\;\sup_{||u||=1}\;{\sigma}_x(u)+{\sigma}_x(-u)=0{\rbrace}$ contains dense (dense $G_{\delta}$) subset of $A_{\phi}$ if and only if X is a Gateaux differentiability (weak Asplund) space.

• 융합정보논문지
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• 제8권2호
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• pp.219-225
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• 2018

본 연구의 목적은 개방형 정보 혁신을 기술 흡수형 혁신과 기술 활용형 혁신으로 나누어 전략적 제휴 요인과 통합하여 수출성과에 미치는 영향을 분석하는데 있다. 본 연구는 구조방정식모형의 PLS(Partial Least Square)를 사용하여 개방형정보 혁신과 전략적 제휴, 수출성과의 관계에서 조직문화의 조절효과를 설정한 6개의 가설을 201개 표본으로 실증분석 했다. 분석 결과 개방형 정보 혁신 중 기술 흡수형 혁신은 전략적 제휴에 영향을 미치지 못했다. 반면 기술활용형 혁신은 전략적 제휴에 긍정적 영향을 주었다. 전략적 제휴는 또한 수출성과에 긍정적 영향이 있는 것으로 나타났다. 조절효과 분석 결과 조직문화와 기술 흡수형 혁신의 상호작용은 전략적 제휴에 긍정적 영향을 주었다. 또한, 조직문화와 기술 활용형 혁신의 조절효과도 전략적 제휴에 유의한 영향을 보였다. 그러나 조직문화와 전략적 제휴의 조절효과는 수출성과에 영향을 미치지 못하였다. 본 연구는 조직문화의 조절효과를 분석한 점에서 기여도가 있다. 향후에는 개방형 정보 혁신과 외부요인의 통합분석이 필요하다.

• 한국버섯학회지
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• 제10권3호
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• pp.120-128
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• 2012

표고균사에서 갈변시기를 조절하고 확인할 수 있는 유전공학적 시스템을 개발하여 톱밥재배용 표고균주를 조기에 선별할 수 있도록 표고균사가 갈변되는 동안 균사상태에서 특이적으로 발현되는 유전자를 분리하기 위하여 갈변되지 않은 균사와 갈변이 완전히 이루어진 균사에서 differential display를 실시하였다. 그 결과 이들 균사로부터 특이적으로 발현되는 두 개의 1.6kb와 1.2kb의 cDNA clone을 선발하여 염기서열을 분석하였다. 이 중 1.6kb의 cDNA단편은 Dugenia polichroa로부터 분리된 microsatellites 유전자와 100%의 상동성을 나타냈다. 그러나 1.2kb의 cDNA 단편은 3'부위에 poly A tail과 5 부위에 partial open reading frame를 가지고 있어 이를 primer로 제작한 후 갈변되지 않은 균사와 갈변이 이루어진 균사에서 RT-PCR을 실시하여 본 결과 갈변이 되지 않은 백색의 균사에서 발현이 확인되었다. 1.2kb의 cDNA 단편의 5' 부위의 염기서열 분석은 110개의 아미노산으로 구성된 partial open reading frame으로 나타났다. 이 유전자를 DNASIS database에서 상동성을 비교해 본 결과 Arabidopsis thaliata에서 분리된 dTDP-glucose 4,6-dehydratases 유전자와 DNA 수준에서는 66.7%, 아미노산 수준에서는 69.2%의 높은 상동성을 나타내었다. 갈변에 관련된 특이 유전자(BCR gene)를 확인하였다. 이 유전자는 산화 stress에 대해 저항성을 나타내는 기능을 가진 것으로 알려져 있어 표고 균사가 갈변될 때 repressor로서 작용할 것으로 생각된다. 따라서 이 유전자를 BCR (Brown Color Repressor) 유전자라고 명명하였다.

• Journal of Mechanical Science and Technology
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• 제16권8호
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• pp.1117-1126
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• 2002

A conducting crack in an electrostrictive ceramic under combined electric and mechanical loading is investigated. Analysis based on linear dielectric model predicts that the surfaces of the crack are not open completely but they are contact near the crack tip. The complete solution for the crack with a contact zone in a linear electrostrictive ceramic under combined electric and mechanical loading is obtained by using the complex variable formula. The asymptotic problems for a semi-infinite crack with a partial opening zone as well as for a fully open semi-infinite crack in a nonlinear electrostrictive ceramic are analyzed in order to investigate the effect of the electrical nonlinearity on the stress intensity factor under small scale nonlinear conditions. Particular attention is devoted to a finite crack in the nonlinear electrostrictive ceramic subjected to combined electric and mechanical loading. The stress intensity factor for the finite crack under small scale nonlinear conditions is obtained from the asymptotic analysis.

• Journal of Chest Surgery
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• 제13권4호
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• pp.394-404
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• 1980

During the period of June 1976 October 1980 131 cases of Open heart Surgery was performed at the National Medical Center in Seoul under the extracorpocal circulation. 77 cases were congenital heart disease and 54 were acquired heart disease. The age of the patients ranged between 2$\frac{1}{2}$ and 51 years. For all patients partial hemodilution technique and moderte hypothermia was used during extracorporeal circulation and cardioplegia was done for myocardial protection since April 1978. 41 of congenital cases were non-cyanotic group and 1 case died. 36 of congenital cases were cyanotic group and revealed very high mortiality rate (16 death, 39%). 53 of acquired cases were cases of valvular heart disease, 34 mitral (3 death), 1 aortic, 4 mitral with aortic 12 mitral with tricuspid (3 death), 2 triple valves (2 death), and revealed mortality rate of 15.1% (8 death). 1 of acquired cases were left atrial myxoma. There were 25 cases of operative death and over all motality rate was 19.1%.

• 한국CDE학회논문집
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• 제2권4호
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• pp.222-236
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• 1997

Conventional solid or surface modeling systems cannot represent both the complete solid model and the abstract model in a unified framework. Recently, non-manifold modeling systems are proposed to solve this problem. This paper describes FlexDesigner, an open kernel system for modeling non-manifold models. It summarizes the data structure for non-manifold models, system design methodology, system modularization, and the typical characteristics of each module in the system. A data structure based on partial-topological elements is adopted to represent the relationship among topological elements. It is efficient in the usage of memory and has topological completeness compared with other published data structures. It can handle many non-manifold situations such as isolate vertices, dangling edges, dangling faces, a mixed dimensional model, and a cellular model. FlexDesigner is modularized hierarchically and designed by the object-oriented methodology for reusability. FlexDesigner is developed using the C++ and OpenGL on both SGI workstation and IBM PC.

• Bulletin of the Korean Chemical Society
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• 제23권11호
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• pp.1560-1567
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• 2002

The transformation devised by Lecomte and Ueda for the study of resonance structures in the multichannel quantum defect theory (MQDT) is used to analyze partial photofragmentation cross section formulas in MQDT analogous to Fano's resonance formula obtained in the previous work for the system involving two open and one closed channels. Detailed comparison of the MQDT results with the configuration mixing (CM) ones is made. Resonance structures and their geometrical relations in the MQDT formulation are revealed and classified by combining Lecomte and Ueda's theory with the geometrical method devised to study the coupling between background and resonance scatterings.

• 한국미생물·생명공학회지
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• 제24권4호
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• pp.415-422
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• 1996

A gene coding for a pyruvyl transferase enzyme involved in exopolysaccharide biosynthesis of Zoogloea ramigera 115SLR was isolated and sequenced. A 4.5 kb of BamHI DNA fragment was isolated from chromosomal DNA using a probe derived from ketal pyruvyl transferase gene of Xanthomonas campestris. The nucleotide sequence of 2.66 kb Pst1/HindIII DNA fragment which was homology with a probe revealed the existence of two complete open reading frames (ORF2 and ORF3) and two partial open reading frames (ORFI and ORF4). The deduced amino acid sequence of ORF3 was homologous to the ketalase (GumL product) of X campestris with 49.5% of similarity and 21.6% of identity. ORF2 on the other hand showed the higher identity with the ketalase (ExoV product) of Rhizobium meliloti (36%) as well as the ketalase of X campestris (23%) than that of ORF3. A gene product of ORF2 was determined with a bacteriophage T7 RNA polymerase/promoter system in E. coli. The molecular weight of protein was 33,500 dalton.

• Journal of Chest Surgery
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• 제21권6호
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• pp.1052-1059
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• 1988

297 cases of military personnel and 7 cases of civilian were operated in K.A.F.C.H. from January 1982 to October 1988 due to cardiovascular disease, which consist of 202 cases [66.4%] of vascular disease, 91 cases [29.9%] of cardiac disease, and 11 cases [3.6%] of pericardial disease. Mean age was 25.8*7.2[2S.D.] year of age and nearly all patients were male except 4 cases of female patient in civilian. Of the 253 cases [83.2%] of acquired disease, vascular diseases were 149 cases [583%], traumatic cardiovascular 54 [21.3%], cardiac 40 [15.8%], and pericardial 10 [4.0%]. Of the 51 cases [16.8%] of congenital diseases, cardiac anomalies were 48 cases [94.1%], vascular 2 [3.9%] and pericardial 1 [2.0%]. Open heart surgery was done in 83 cases of cardiac disease, which consists of 39 cases [46.9%] of valvular heart disease, 22 cases [26.59o] of ASD, 14 cases [16.9%] of VSD, 2 cases [2.4%] of partial ECD, and so on. Of the 6 cases [2.0%] of over-all mortality, operative death in open heart surgery was 4 cases[4.8%].

• 대한수학회지
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• 제44권1호
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• pp.1-10
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• 2007

The purpose of this paper is to define generalized twisted q-Bernoulli numbers by using p-adic q-integrals. Furthermore, we construct a q-analogue of the p-adic generalized twisted L-functions which interpolate generalized twisted q-Bernoulli numbers. This is the generalization of Kim's h-extension of p-adic q-L-function which was constructed in [5] and is a partial answer for the open question which was remained in [3].