• 대한화학회지
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• 제42권6호
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• pp.599-606
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• 1998

산화물 초전도체 발견 후 많은 이론적 발전이 있었으나, 초전도 상전이를 정확히 설명하는 이론은 아직 없다 하겠다. 특히 상전이점 근처에서 발견되는 이중전이(double transition)나 다양한 자기적 상전이에 대해서는 아직 정확한 이해가 없는 상태이다. 본 논문에 서는 전자유체의 응축모델을 사용하여 초전도 전이에 있어서, 전자기체의 응축과정이 CONFINEMENT와 TRAP의 두 단계로 일어남을 알았다. 이 두 단계 전이 메카니즘은 이중전이를 잘 설명할 뿐만 아니라, 여러 형태의 초전도에서 보이는 자기적 성질, 특히 다양한 vortex structure를 보여주는 magnetic phase transition을 잘 설명할 수 있었다. 여러 종류의 초전도체들에서 공통적으로 발견되는 double transition과 다양한 magnetic phase transition을 잘 설명할 수 있는지 여부가 초전도 현상 설명의 일반이론으로 적합한지를 결정할 것이다.

• 한국지구과학회지
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• 제25권4호
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• pp.222-231
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• 2004

본 연구에서는 제7차 교육과정에 의해 편찬된 21종의 과학 교과서와 지도서에 나타난 섭입경계에서의 마그마 형성 관련 내용에 대한 본문 진술과 제시된 그림들을 분석하여 문제점을 지적하고 그 개선방안을 모색하였다. 분석 결과 교과서간 마그마의 정의에 일관성이 없었으며, 대부분의 교과서에서 마그마의 생성기원에 관한 과학적 개념 진술이 정확하지 않거나 기재되지 않았다. 또한 교과서에 제시된 그림들은 본문 내용과 일치하지 않았으며, 판구조론과 섭입경계에서의 화성활동에 대한 학생들의 과학적 개념형성에 부족하고 잘못된 내용을 포함하고 있다. 이들은 주로 마그마의 생성기작(형성과정), 기원물질, 생성위치와 관련된 것들로서, 본 연구에서는 최근에 발표된 연구결과들을 바탕으로 섭입경계에서 분출되는 대부분의 중성마그마가 쐐기맨틀의 부분용융에 의해 형성된다는 사실을 종합적으로 이해할 수 있는 적절한 개념도를 제시하였다.

• 대한한의학원전학회지
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• 제33권2호
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• pp.1-12
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• 2020

Objectives : In this paper, lung atrophy syndrome[肺痿] in 『Huangdineijin(黃帝內經)』 and 『Jinguiyaolue(金匱要略)』 were compared, followed by examining its relation with upper wasting thirst[上消]. Also, ways in which psychological factors that contribute to lung atrophy syndrome could cause upper wasting thirst were studied. Methods : Verses from 『金匱要略·肺痿肺癰咳嗽上氣病脈證治』 and 『素問·痿論』 were analyzed based on various annotators's opinions to determine the cause and mechanism of lung atrophy syndrome and its relationship with upper wasting thirst. Results : In 『Jinguiyaolue(金匱要略)』, lung atrophy syndrome is described as the heat of the upper body entering the lungs to dry it out. The description in 『Suwen(素問)』 differs in that it accompanies atrophy symptoms, but the mechanism is the same. Lung atrophy syndrome in 『Jinguiyaolue』 could come from wasting thirst, while wasting thirst can be accompanied in deficiency caused by chronic lung atrophy syndrome. Heat in the lungs is caused by psychological factors where the person has lost its subject of possession or was unable to attain what was desired. When expanded to include heart atrophy syndrome[心痿] and lung atrophy syndrome[肝痿], the reason for upper wasting thirst could include immense sadness or excessive indulgence in pleasure due to unmet desires. Conclusions : Although diabetes and wasting thirst are not identical, application of wasting thirst pattern differentiation to diabetes treatment and management could lead to tailored treatment of each patient. Moreover, the five zhang pattern differentiation from the 『Suwen(素問)』 could increase treatment efficacy when applied to conditions caused by stress and emotional disorder, which are increasingly playing larger roles in causing wasting thirst, or diabetes.

• Bulletin of the Korean Chemical Society
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• 제29권7호
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• pp.1335-1343
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• 2008

Theoretical studies on the un-catalyzed and catalyzed aminations of ketene with $NH_3$ and $(NH_3)_2$, respectively, were studied using MP2 and hybrid density functional theory of B3LYP at the 6-31+G(d,p) and 6- 311+G(3df,2p) basis sets in the gas phase and in benzene and acetonitrile solvents. In the gas phase reaction, the un-catalyzed mechanism was the same as those previously reported by others. The catalyzed mechanism, however, was more complicated than expected requiring three transition states for the complete description of the C=O addition pathways. In the un-catalyzed amination, rate determining step was the breakdown of enol amide but in the catalyzed reaction, it was changed to the formation of enol amide, which was contradictory to the previous findings. Starting from the gas-phase structures, all structures were re-optimized using the CPCM method in solvent medium. In a high dielectric medium, acetonitrile, a zwitterions formed from the reaction of $CH_2$=C=O with $(NH_3)_2$, I(d), exists as a genuine minimum but other zwitterions, I(m) in acetonitrile and I(d) in benzene become unstable when ZPE corrected energies are used. Structural and energetic changes induced by solvation were considered in detail. Lowering of the activation energy by introducing additional $NH_3$ molecule amounted to ca. −20 $\sim$ −25 kcal/mol, which made catalyzed reaction more facile than un-catalyzed one.

• 동의생리병리학회지
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• 제25권6호
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• pp.945-960
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• 2011

The BianMaiFa chapter, which is the first chapter of SongBon ShangHanLun, is the scholarly description(專論) of the pulse and pathological mechanism but has not been studied and published yet. This study is about article 1-10 which is the first part of The BianMaiFa chapter. We compared the original texts within the editions, comparing and analyzing the annotations of successive dynastic medical group. The articles of The SongBon ShangHanLun BianMaiFa chapter 1-10 is consisted as is shown: article 1 discriminates pulse by yin-yang and states about the prognosis of disease according to pulse, article 2 states about binding in yin and binding in yang which is from abnormal exuberance of yin and yang, article 3 states about the pulse and pathological mechanism of chills with fever, article 4 states about pathological mechanism and symptom of nutrient and defense through pulse, article 5 distinguishes within binding in yang(陽結), binding in yin(陰結), yang faintness(陽微), yang debilitation(陽衰), blood collapse(亡血) by the pulse which was in article 2 3 4, article 6 7 8 9 10 states states about the shape or pathological mechanism of bound pulse(結脈) skipping pulse(促脈) stirred pulse(動脈) moderate pulse(緩脈) string-like pulse(弦脈) tight pulse(緊脈) drumskin pulse(革脈). Article 4 could be understood that inch pulse is floating and deficient shape and cubit pulse is sunken and weak shape(寸脈浮虛, 尺脈沈弱) related to article 3, article 5 could be understood as binding in yin and yang is aggregation shape related to article 2, yang-qi faintness is floating and debilitation shape, yang-qi debilitation is sunken and faint shape, blood collapse is deficient and stasis shape related to article 3 4.

• BMB Reports
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• 제42권2호
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• pp.86-90
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• 2009

Deletion of smpd3 induces osteogenesis and dentinogenesis imperfecta in mice. smpd3 is highly elevated in the parietal bones of developing mouse calvaria, but not in sutural mesenchymes. Here, we examine the mechanism of smpd3 regulation, which involves BMP2 stimulation of Runx2. smpd3 mRNA expression increased in response to BMP2 treatment and Runx2 transfection in C2C12 cells. The Runx2-responsive element (RRE) encoded within the -562 to -557 region is important for activation of the smpd3 promoter by Runx2. Electrophoretic mobility shift assays revealed that Runx2 binds strongly to the -355 to -350 RRE and less strongly to the -562 to -557 site. Thus, the smpd3 promoter is activated by BMP2 and is directly regulated by the Runx2 transcription factor. This novel description of smpd3 regulation will aid further studies of bone development and osteogenesis.

• 한국전자거래학회:학술대회논문집
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• 한국전자거래학회 1997년도 한국전자거래학회 종합학술대회지
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• pp.263-268
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• 1997

Functional Modeling methodology, IDEF0 is widely used for modeling, analysis and description of enterprise system. The limitation of modeling components restricts applicability and give rise to confusion about model. In this paper, we propose new method to extend IDEF0. The first is adding modeling components which are semantic representations. In addition to ICOMs, we add the time and cost component which is required to execute the function. The second is tracing mechanism. When we need some information, we drive the functions related with the information by reverse tracing of the function which produces the information as a output and input. Through the tracing, we find out the bottleneck process or high cost process. Finally, we suggest the final decomposition level. We call the final decomposed function into unit function which has only one output data. We can combine and reconstruct some of functions because an unit function is similar to ‘lego block’. To reach the integrated system, the main problem to be solved is the integration of information produced by different functional subsystem. This can be resolved when the creation of data must be dependent on only one function. Through view integration of function output, we can guarantee the integrity of data.

• 전자공학회논문지B
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• 제31B권11호
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• pp.124-135
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• 1994

본 논문에서는 한국어 특수구문의 처리를 위한 국어 구문 분석 시스템을 제안한다. 문법의 기술은 동사와 의미를 통합적으로 처리하는 HPSG를 채택하고, 파싱 기법으로는 한국어에 유리한 단방향 활성 차트 파싱을 사용한다. 본 논문의 파서는 포괄적인 문장 구조(보어-중심어 구조, 수식어-중심어 구조, 중심어-중심어 구조)의 처리뿐만 아니라, 실용적인 문장에서 많이 나타나는 보조용언 구몬, 사동문, 피동문, 명사화 어미, 존칭, 화계와 같은 특수구문에 대해서도 파싱을 할 수 있도록 구현되었다.

• 한국데이타베이스학회:학술대회논문집
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• 한국데이타베이스학회 1997년도 International Conference MULTIMEDIA DATABASES on INTERNET
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• pp.455-462
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• 1997

SGML(Standard Generalized Markup Language) is the ISO standard fer describing the logical structure of documents and is also adopted as the CALS standard for document description. Since then, there have been growing interests in SGML application in a variety of fields. However because SGML doesn't provide a standard method for describing various processing informations, ie, formatting and transformation, most applications have applied methods that are system dependent. Recently, ISO defined DSSSL(Document Style Semantics and Specification Language) as a standard mechanism to specify the formatting, transformation and retrieval of structured documents. Therefore, in this paper, we present a DSSSL processing system far style control of structured documents such as SGML documents. The system processes DSSSL style sheet that describes layout of documents and browses the result of its application to a SGML document. We have conducted tests on a lot of SGML documents and DSSSL style sheets successfully. Now, we are developing the SGML document management system that supports creation, editing, storage and retrieval of SGML document based upon the DSSSL processor and the SGML parser which we have developed.

• 대한산업공학회지
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• 제12권1호
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• pp.119-131
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• 1986

Described in this paper is a modelling methodology for mass production system simulation. The mass production system under consideration consists of various types of flow lines, special purpose production facilities, conveyor lines, palletized carts, and storage facilities. This type of production system is typical in home appliance industry, automobile industry, footwear industry, etc. where a variety of product mix are mass-produced. The modelling methodology is based on the "discrete-event formalism", and an "activity-oriented world view" is adopted to formalize the system description. A distinctive feature of the modelling methodology is that only the static structure (ie, system components) is included in the fixed model. The dynamic structure of the system is specified through a "data-driven" mechanism, which is an extension of the "experimental frame" concept. Each type of system components (ie, flow line, conveyors, carts, etc.) is formally modeled by using Activity Cycle Diagrams. The issue of "model structuring" is also addressed. The modeling methodology has been successfully applied in a real simulation study of a mass production system.