• 설비공학논문집
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• 제9권3호
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• pp.410-425
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• 1997

Buildings are mostly under part load conditions causing an inefficient system operation in terms of energy consumption. It is critical to operate building air-conditioning system with a scientific or optimal manner which minimizes energy consumption and maintains thermal comfort by matching building sensible and latent loads. Little research has been performed in developing general methodologies for the optimal operation of air-conditioning system. Based on this research motivation, system simulation program was developed by adopting various equipment operating strategies which are energy efficient especially for humidity control in summer. A numerical optimization technique was utilized to search optimal solution for multi-independent variables and then linked to the developed system simulation model within a mam program. The main goal of the study is to provide a systematic framework and guideline for the optimal operation of air-conditioning system focusing on air-side. For given cooling loads and ambient outdoor conditions the optimal operating strategies of a commercial building are determined by minimizing a constrained objective function by a nonlinear programming technique. Desired space setpoint conditions were found through evaluating the trade-offs between comfort and system power consumption. The results show that supply airflow rate and compressor fraction play main roles in the optimization process. It was found that variable setpoint optimization technique could produce lower indoor humidity level demanding less power consumption which will be benefits for building applications of humidity problem.

• 대한수학교육학회지:학교수학
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• 제4권4호
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• pp.601-615
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• 2002

This paper analyzed <7-나> and <8-나> textbooks and teacher instruction activities in classrooms, focusing on procedures used to solve construction problems. The analysis of the teachers' instruction and organization of the construction unit in <7-나> textbooks showed that the majority of the textbooks focused on the second step, i.e., the constructive step. Of the four steps for solving construction problems, teachers placed the most emphasis on the constructive order. The result of the analysis of <8-나> textbooks showed that a large number of textbooks explained the meaning of theorems that were to be proved, and that teachers demonstrated new terms by using a paper-folding activities, but there were no textbooks that tried to prove theorems through the process of construction. Here are two alternative suggestions for teaching strategies related to the construction step, a crucial means of connecting intuitive geometry with formal geometry. First, it is necessary to teach the four steps for solving construction problems in a practical manner and to divide instruction time evenly among the <7-나> textbooks' construction units. The four steps are analysis, construction, verification, and reflection. Second, it is necessary to understand the nature of geometrical figures involved before proving the problems and introducing the construction part as a tool for conjecture upon theorems used in <8-나> textbooks' demonstrative geometry units.

• 한국기록관리학회지
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• 제14권2호
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• pp.61-82
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• 2014

기록전거레코드는 이용자가 기록물에 접근하고, 기록물을 이해하는 것을 지원한다. 그런데 기록물의 생산자는 기록 외에 다른 출판물의 생산자이기도 하며, 이용자도 정보에 통합적으로 접근하기를 원한다. 게다가 기록전거레코드와 서지제어를 위한 전거레코드는 상이한 특성을 지니면서도 상호 연계가능한 공통점을 지니고 있다. 이에 본 연구에서는 기록전거레코드를 구축하거나 확장하는데 기존의 전거레코드를 반입하여 이용하고, 확장된 기록전거레코드를 다시 공유할 수 있도록 위키피디아와 같은 웹 환경에 반출하는 방안을 제안하였다. 그리고 시범적인 연계 및 공유결과를 바탕으로 도출된 시사점과 향후 과제를 제안하였다.

• Biomolecules & Therapeutics
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• 제19권4호
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• pp.445-450
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• 2011

Preciously, we demonstrated that a novel NHE-1 inhibitor, KR-33028 attenuated cortical neuronal apoptosis induced by glutamate. In the present study, we investigated the signaling mechanism of neuroprotective effect of KR-33028 against glutamate-induced neuronal apoptosis, especially focusing on mitochondrial death pathway. Our data showed that glutamate induces a biphasic rise in mitochondrial $Ca^{2+}$ and that KR-33028 significantly prevents the second phase increase, but not the first phase increase in mitochondrial $Ca^{2+}$. Furthermore, KR-33028 restored the ${\Delta}{\Psi}_m$ dissipation and cytochrome c release into cytoplasm induced by glutamate in a concentration-dependent manner. The inhibition of mitochondrial $Ca^{2+}$ overload by ruthenium red also inhibited glutamate-induced apoptotic cell death, mitochondrial membrane potential, ${\Delta}{\Psi}_m$ dissipation and cytochrome c release. These data suggest that inhibition of mitochondrial $Ca^{2+}$ overload is likely to be attributable to anti-apoptotic effect of KR-33028. Taken together, our results suggest that anti-apoptotic effects of NHE-1 inhibitor, KR-33028 may be mediated through maintenance of mitochondrial function.

• Food Science and Biotechnology
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• 제15권4호
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• pp.516-522
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• 2006

This study was to assess the antimicrobial action of 2-hydroxyethyl ${\beta}$-undecenate purified from cumin (Cuminum cymium L.) seed against the oral anaerobe, Streptococcus mutans, which is associated with gingivitis, specifically focusing on the catabolic effect. 2-Hydroxyethyl ${\beta}$-undecenate inhibited the acid production and growth of S. mutans after 30 hr incubation at 50 mM. The glycolysis of S. mutans with glucose as substrate was similarly sensitive to 2-hydroxyethyl ${\beta}$-undecenate, with 70% inhibition of glucose utilization at 5 mM and 90% inhibition at 50 mM. In addition, this substance potently inhibited the glycolysis enzyme, glyceraldehyde-3-phosphate dehydrogenase (GADP); the phosphoenolpyruvate, glucose phosphotransferase (Glucose-PTS); and membrane ATPase, in a concentration dependent manner. The $IC_{50}$ values for inhibition of GADP, Glucose-PTS, and ATPase were 1, 0.9, and 5 mM, respectively. Furthermore, 2-hydroxyethyl ${\beta}$-undecenate inhibited teeth calcium ion elution by 80% at 50 mM. These results suggest that 2-hydroxyethyl ${\beta}$-undecenate is a potent inhibitor of carbohydrate metabolism and the growth of S. mutans JC-2.

• 패션비즈니스
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• 제6권4호
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• pp.99-112
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• 2002

The purpose of this study is to find out various types of stripes pattern and to review its' design expression by analysing stripe pattern and visual effect appeared in western women's fashion after 20th centuries. As regards the visual effect of stripe pattern, on the basis of the stripe pattern's direction laid out, we made an investigation of it by classfying it into verticality, horizontality, slant line and mixture of them according to its' gap and thickness. Here are the 4 features of the stripe pattern appeared in modern fashions. The first, graphic variation based on diverse variation and reconstruction and combination between other motives is being onthe rise as a new expression. The second, colorful stripes of Missoni can be exanpled as the trend of diversification of color. The third, as regards the trend of mismatch in pattern, coordination through mismatch can produce experimental and post-modern image. The fourth, as for the expression of draping effect, we find that stripe pattern can maximaze visual effect through draping by inducing visual stimulus, as well as can express human body in a beautiful manner.

• 비교문화연구
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• 제52권
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• pp.313-339
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• 2018

이 논문은 19세기 유럽 의학의 업적인 미생물 발견과 함께 발전된 '세균이론'(germ theory)이 어떻게 '침범'의 공포를 야기하는지, 그리고 어떻게 '침범'의 공포가 미국의 반-이민(Anti-immigration) 정서와 공모해 동시대 제국주의적 정치 이념을 완수하게 되는지를 밝힌다. 의학과 정치가 연루되는 과정을 살피기 위해 우선 유럽에서 시작된 '세균이론'의 정치적 특징을 구분하고, 이 '세균이론'이 미국에 도입되면서 어떻게 '미국적'으로 변형되는지를 규명할 것이다. 세균이론 혹은 침범이론으로 "이선 프롬"을 독해할 때, "이선 프롬"(Ethan Frome)에 드러난 이디스 워튼(Edith Wharton)의 제국주의적 시선을 밝힌 엘리자베스 애먼스(Elizabeth Ammons)의 분석은 유용하다. 그러나 애먼스는 주인공의 내적 갈등과 선택에 주목하지 않음으로써 거기에 작동하는 '미국적' 침범이론의 특징을 놓치고 있다. 이 논문은 바로 그러한 '미국적' 특징을 살펴보는데 의의가 있다.

• 대한건축학회논문집:계획계
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• 제33권12호
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• pp.3-11
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• 2017

The non-mandatory guidance and illogical ordinance of local government generate complicated and vague regulations and procedures. These cause inconvenience in building administration, and give rise to unnecessary social and administrative expenses. The purpose of this study is to suggest the improvement of building administration by local government from an institutional point of view through the literature review and the specialist survey focusing on the problems arising from the building ordinances and non-mandatory guidance. The results of this study are as follows; In the first place, the connection between law and ordinance should be improved in a systematic, definitude manner and high-degree of completion. Second, the monitoring management system should be arranged in order to excavate and improve the non-mandatory guidance. Third, the effort should go into improving ability and disposition of building official. Fourth, it is necessary to materialize and clarify the regulatory contents and adjust them to fit the legal system. Lastly, it is important to reinforce incentives and procedures of verification in order to manage building ordinances of legal government's own free will. In order to improve of building administration by local government, it is necessary to make the structure of sustainable improvement and discuss not only institutional aspect but also elements of building administration in later study.

• 건축역사연구
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• 제30권4호
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• pp.91-102
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• 2021

This study is a case study of system improvement measures for urban regeneration of the historical and cultural environment. The example areas are Hwangnam and Inwang Hanok districts in Gyeongju City, which operate various systems to solve the urban decline problem caused by the historical and cultural environment regulations. The subjects of this study are resident support programs and district unit planning systems under the advanced promotion system established in the case area. As research methods, literature studies, field surveys, and in-depth interviews were conducted. Through this, the background and purpose of introduction of each system, major plan contents, and problems of the system application process were analyzed. This study drew the following implications through case studies. First, in order to more effectively promote the urban regeneration of the historical and cultural environment, it is necessary to improve the related systems in an integrated and systematic manner. Second, in order to resolve the policy distrust of local residents in the historical, cultural and environmental management system, a wider variety of planned alternatives to narrow the difference in interests between the public and private sectors should be presented.

• 한국군사과학기술학회지
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• 제24권2호
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• pp.187-196
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• 2021

The Network-Centric warfare over weapon data link networks has been developed for the recent decade. Since the US navy had begun to develop tactical digital information chain, it has gradually transformed into weapon data link technology. As data link network system and its protocol have been advanced into high-technology, focusing and targeting on moving targets become possible in net-enabled environments. However, it is difficult to identify the primary information from numerous battlefields and understanding approaches to damage a target in a timely manner. In this paper, to better understand the targeting assessment, we suggest a specific solution: Bomb Hit Indication(BHI) using information in weapon data link messages. In order to prove our suggestion, we implement the BHI solution and apply it into the weapon data link integrating system.