• 한국해양공학회지
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• 제34권1호
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• pp.1-12
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• 2020

Although there are many kinds of advanced ballast water management systems, pioneering studies for ballast-water free ship and minimal ballast water ship concepts are in progress. In this study, the existing alternatives of ballast water are reviewed and a new design concept is studied on the basis of the existing bulk carrier hull form. To develop a new design alternative which has minimal ballast for ballast water discharge free operation, the new concept should have technical feasibilities that are related to the role of the ballast water, berth access, loading constraints, etc. For this purpose, a simplified systems engineering basis design approach is adopted using a business model as the system analysis and control tool. To check the performance feasibility of the new concept, ship resistance performance is reviewed based on a model scale ship resistance performance analysis.

• 전력전자학회논문지
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• 제20권1호
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• pp.19-30
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• 2015

A static synchronous compensator (STATCOM) applied to rapidly changing, highly unbalanced loads such as electric arc furnaces (EAFs), requires both positive-sequence and negative-sequence current control, which indicates fast response characteristics and can be controlled independently. Furthermore, a delta-connected STATCOM with cascaded H-bridge configuration accompanying multiple separate DC-sides, should have high performance zero-sequence current control to suppress a phase-to-phase imbalance in DC-side voltages when compensating for unbalanced load. In this paper, actual EAF data is analyzed to reflect on the design of current controllers and a pioneering zero-sequence current controller with a superb transient performance is devised, which generates an imaginary -axis component from the presumed response of forwarded reference. Via simulation and experiments, the performance of the positive, negative, and zero-sequence current control of a cascaded H-bridge STATCOM for EAF is verified.

• KIEAE Journal
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• 제9권2호
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• pp.73-80
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• 2009

In the early twentieth century, many architects still practised eclectic design elements. Emergence of new building materials such as steel, concrete and glass were not yet found fresh roles in architectural design. It was Brussels that the use of modern materials gave rise to their new forms and gave influence to not only building skins but also spatial organization. Art Nouveau architecture is often seen as revolutionary and pioneering modern architecture against eclectic classicism prevalent in the 18th and 19th centuries. Despite the fact that some scholars point out that Art Nouveau is more a transient phenomenon than modern architecture proper, no one would deny that Art Nouveau carries a good deal of modern characteristics. This paper intends to show rather ambivalent perspectives upon Art Nouveau architecture. Although it insinuates overly dynamic nature in architectural languages, it does not hamper us from reading Art Nouveau as a vital component of modern architecture. Through a careful analysis of the early domestic designs of Victor Horta, it becomes evident that his work can provide modern architecture a meaningful alibi for its growth. Victor Horta's house design is well known to the public, both for his classical tastes and for its changing implementation. Horta's modern quality is never adequately recognized, partly due to his eye catching modern iron properties and sinuous ornamentation. This paper tries to offer an insight into the complicated stage set of the fin-de-$si{\grave{e}}cle$ through the work of Victor Horta whose influence has been immense in the making of modern architecture.

• Architectural research
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• 제19권1호
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• pp.21-26
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• 2017

This research examines the historic preservation of Korean modern architecture by applying Kenneth Frampton(1930-)'s concept of critical regionalism. It explores the representative Korean modern architect Gil-ryong Park (1898-1943) and two of his buildings: the Hwashin Department Store (1935) and the No-soo Park house (1937-1938). The former was in the hot spot on the preservation. There were plans to preserve this building but that it ended up being demolished in 1987. The latter building, however, has been preserved and is currently being used as a museum. These two Korean modern buildings are explored through the frame of Kenneth Frampton's critical regionalism, in particular focusing on three important concepts: "dialectical expression," "place-form," and "sustainability." In this sense, this research will provide pioneering research in understanding the preservation of Korean modern architecture through a representative Western modern theory. In the early $20^{th}$ century, Korean modern architecture, which was built during the Japanese colonial period (1910-1945), could be interpreted as critical regionalism because it represented a dialog between the West and the East, in particular between Western modernism, Japanese modernity, and Korean tradition in the East Asian context. Understanding Korean modernism in this context of a cross-cultural perspective enables scholars to define both the origins and uniqueness of Korean modern architecture.

• International Journal of CAD/CAM
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• 제6권1호
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• pp.199-211
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• 2006

Practical automated flat pattern generation with inbuilt production features for doubly curved sheet metal components (SMCs) is addressed here utilizing a new and unique Point Transformation Algorithm (PTA). This is the third in the series of papers on practical Flat Pattern Development (FPD) [8] and Production Loft Generation Systems (PLGS) [9] complementing the pioneering work [6,7]. In the first two publications, automated loft generation programs have addressed sheet metal components having a Principal Flat Surface (PFS) only. The flat pattern development of 3-D components that do not have the flat surface(termed as Non-PFS components) having complex features of double curvature in addition to cutouts and nibbled holes typical of aircraft components were so far not addressed due to lack of relevant published algorithms. This paper traces the evolution of developments and provides the record of fully illustrated, automated loft generation scheme for aircraft SMCs including the Non-PFS components which underwent validation through production tests by sponsors. Details of some of the unique features of the system like simplified surface model generation, termed as topological model and powerful algorithms deployed with potential for CAD/CAM applications are included.

• 청정기술
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• 제22권1호
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• pp.1-8
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• 2016

최근 나노기술의 급격한 발전은 산업 분야에 새로운 활용 가능성을 제시하고 있다. 그러나 나노물질의 연간 생산량 증가와 함께, 비의도적인 환경 노출이 야기되고 있다. 따라서 지속적인 나노기술의 발전을 위해서도 나노폐기물에 관한 효과적인 관리가 필요하다. 나노폐기물 처리의 최종 단계는 바로 소각시설을 이용하는 것으로 보고 있다. 나노물질의 소각처리에 관한 문헌자료가 부족하지만, 일부 선도적인 연구자들에 의하면 소각시 나노물질의 대기노출은 억제되지만 바닥재는 결국 매립되어 나노물질은 잔존하게 된다는 것이다. 아직까지는 소각장내 나노물질의 거동과 다양한 질문거리가 남아 있지만, 무엇보다도 소각을 통한 나노폐기물 처리가 인간 및 환경 영향을 최소할 할 수 있는 안전하고 효과적인 나노물질 처리법인지가 검토되어야 할 것이다.

• 대한산업공학회지
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• 제40권3호
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• pp.333-341
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• 2014

The purpose of this study is to forecast the penetration rate of renewable energy and a reasonable scale for the R&D investment plan in Korea based on the relationship between the diffusion and R&D investments drawn by analogy from empirical cases of advanced countries. Among numerous candidate developed countries, the German market was chosen based on the similarity of the diffusion patterns to those of the Korean plan. We then figured out how the investment triggers the growth of technology from the selected benchmark, and applied the technology S-curve relation formula to derive the desirable investment plan for Korea. The present paper is a pioneering attempt to forecast the diffusion process of renewable energy technology in Korea using the comparative analogy from cases of advanced countries.

• 유통과학연구
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• 제18권11호
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• pp.61-67
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• 2020

Purpose: This paper aims to examine the interaction effect of customers relationship management (CRM) on the competitive advantage (CA) of small and medium-scale enterprises (SMEs) in Yemen. Research design, data and methodology: This study applied a quantitative approach in dealing with the interaction effect of CRM dimensions and SMEs' competitive advantage in Yemen. The research uses a sample of 247 manufacturing SMEs surveyed in Yemen. Results: The results indicate that only three dimensions of CRM, namely (TCM), (KM) and (CRMO), have a significant effect on SMEs' competitive advantage, but not that between (KCF) and SMEs' competitive advantage. Conclusions: The findings of this study offer important insights for owners and managers of SMEs, researchers and policymakers to further understand the effects of CRM on SMEs' competitive advantage. SMEs should also be encouraged to develop their CRM to improve their competitive advantage. Lastly, this study makes several contributions to the literature, the first of which is the provision of evidence concerning the major role of CRM as a dependent variable and competitive advantage as an independent variable. The second contribution pertains to its pioneering status in examining the direct relationship between CRM dimensions and the competitive advantage of SMEs in a Middle Eastern country.

• 노동경제논집
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• 제31권3호
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• pp.47-74
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• 2008

본 연구는 임금과 생산성의 관계에 대한 선행 연구에서 근호자의 생산성 지표로서 인사고과 정보를 활용한 Medoff and Abraham과 Flabbi and Ichino의 연구를 한국 대기업의 인사데이터(2000년, 제조업 근로자)에 적용하여 재현하였다. 임금함수의 OLS 추정과 임금 및 인사고과 분포를 활용한 다항로짓함수 추정을 통해 분석한 결과, 근로자 개인의 생산성을 통제한다고 하더라도 연공임금은 계속 나타났다. 이는 선행연구와 동일하게 연공임금을 설명함에 있어 인적자본 이론보다는 인센티브 이론이 더 적절하다는 것을 시사한다.

• Parasites, Hosts and Diseases
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• 제52권3호
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• pp.235-242
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• 2014

Paleoparasitology is the application of conventional or molecular investigative techniques to archeological samples in order to reveal parasitic infection patterns among past populations. Although pioneering studies already have reported key paleoparasitological findings around the world, the same sorts of studies had not, until very recently, been conducted in sufficient numbers in Korea. Mummified remains of individuals dating to the Korean Joseon Dynasty actually have proved very meaningful to concerned researchers, owing particularly to their superb preservation status, which makes them ideal subjects for paleoparasitological studies. Over the past several years, our study series on Korean mummies has yielded very pertinent data on parasitic infection patterns prevailing among certain Joseon Dynasty populations. In this short review, we summarized the findings and achievements of our recent paleoparasitological examinations of Joseon mummies and discussed about the prospects for future research in this vein.