• Journal of Digital Convergence
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• v.11 no.2
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• pp.407-412
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• 2013

The design trend of leisure boat has been developed through interrelation of maritime culture and ships. We studied the design trend of leisure boat of several countries with advanced maritime culture and proposed digital design process of electric boat exterior that could reflect sensibilities of Korean customers. The result could be useful to domestic small and medium-scale shipbuilders currently face global financial recession and new challenge to focus on development of eco-friendly leisure ships.

• Proceedings of the KIPE Conference
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• 2014.11a
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• pp.171-172
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• 2014

조선해양 생산현장에서는 생산 용도로 다양한 에너지원을 사용하고 있지만 가장 많이 사용하는 에너지원은 전기이며, 전기의 30% 이상을 압축공기 생산에 사용하고 있다. 압축공기를 동력으로 이용하는 경우, 특히 그라인더에서는, 에너지 변환 효율이 전력대비 1/4~1/5 수준으로 매우 낮다. 본 연구에서는 공압 그라인더를 BLDC 모터 전동 그라인더로 대체하기 위한 연구를 수행하였다. 그 결과 7인치 공압 그라인더와 대등한 출력을 내면서 안전성과 내구성 면에서 우수한 상용급 전동 그라인더 시제품을 설계 및 개발하였다. 또한 시제품에 대한 현장 시험을 거쳐 다양한 개선방안과 설계개선안을 통해 향후 상용급 BLDC모터 전동 그라인더 개발을 위한 설계기술을 확보할 수 있었다.

• Journal of the Society of Naval Architects of Korea
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• v.44 no.3 s.153
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• pp.238-247
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• 2007

This paper presents the thrust loss suppression algorithm in the electric propulsion ship. The thrust loss due to cavitation can be regarded as the disturbance torque. The disturbance torque is estimated by means of the disturbance observer. Considering the estimated disturbance torque, the speed reference of the propeller is modified to suppress the thrust loss. The experimental results which performed in the cavitation tunnel with electric machine operating system and its controller will be shown to verify the proposed algorithm.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.36 no.1
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• pp.36-41
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• 2023

We investigated the properties of vanadium oxide (VOx) buffer layers deposited by a dual RF magnetron sputtering method under various target powers for inverted organic solar cells (IOSCs). Sputter fabricatged VOx thin films exhibited higher crystallinity with the increase of target power, resulting in a uniform and large grain size. The electrical properties of VOx films are improved with the increase of target power because of the increase of V content. In the results, the performance of IOSCs critically depended on the target power during the film growth because the crystalllinity of the VOx film affects the carrier mobility of the VOx film.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.767-770
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• 2011

선박은 항해시에 여러 가지 정보 시스템을 필요로 한다. 이러한 시스템들은 상호 연관성 없이 떨어져서 개별적으로 운용되고 있으며 시스템 확장을 고려하지 않고 구축되었기 때문에 선박 내 다른 장소나 육상에서 운항관련 정보에 접근하기가 어렵다. 본 논문에서는 이러한 문제를 해결하고자 선박 항해에 필요한 여러 시스템을 통합해서 모니터링하는 웹기반 시스템인 nDisplay를 개발하였다.

• Korean Journal of Heritage: History & Science
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• v.50 no.2
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• pp.4-25
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• 2017

The Hoeamsa Temple of Yangju City was established at least during the late Korea Dynasty. This temple was rebuilt several times with the support of the royal family from the late Korea Dynasty to the early Joseon Dynasty. It was continually rebuilt in association with JiGong monk, HyeKeun monk, and MuHak monk. Hoeamsa temple was leading the Buddhist culture as a Buddhist center of the Joseon Dynasty . It was destroyed in the late Joseon Period. This site has been excavated several times since 1997. Various roofing tiles were unearthed. Of these tiles the edge of eaves are the artifacts showing the best features of this era. In this temple site has been excavated a variety of Sanskrit roof tiles. These tiles were made using superior technique. On the roof tiles are engraved Sanskrit mantras with a variety of 1 to 9 words. The jeongbeopkkye mantra(oṃ raṃ) and six-word mantra(oṃ ma ṇi pa dme hūṃ) were discovered the most. These mantras were believe to expel several evils from the Buddhist temple. It must have been that the six-word mantra culture became prevalent and provided a turning point in the history of Korean Buddhism. We can clearly know when some of the Sanskrit roof tiles were first manufactured. These roof tiles are the absolute standard of the other Sanskrit roof tiles excavated from different Buddhist temples. The master craftsmen must have been very skilled, understood the mantra very well, and had deep faith in the Sanskrit mantra. Hoeamsa Temple is a milestone in studying the Sanskrit roof tiles. More studies on various aspects are expected to be followed.

• Journal of the Korean Society of Costume
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• v.67 no.1
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• pp.147-168
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• 2017

This study examines the types and characteristics of women's garments excavated in the early Joseon Dynasty before 1592. The study sorts out headgear, jacket, skirt and trousers, and coats from the historical texts in the early Joseon Dynasty and excavated women's wears in the fifteenth and sixteenth centuries, and analyzes their textiles and patterns. The Joseon women's garments convey several features. They are wide across the chest and square shaped collar with virtually straight sleeves. While their breast-ties are extremely little for the size of clothes, they do not have any inner-tie. They have broad and short dongjeongs which seem to be hard to be adjusted. There are a variety of headgear. Jang-Jeogori slit down in both sides. The Jeogori after the seventeenth century transformed a more practical form of a fitting dress to an individual body in comparison with the sixteenth jeogori. It is identified that the fabrics in the early Joseon period were woven more diversely and colorfully than the late Joseon period. Most of the excavated fabrics in the sixteenth century were in silk. Materials for adornments before 1592 were not much diverse and their designs mostly contained patterns of lotus flowers, patterns of cloud and treasures with oblique lines. The colors are mainly brown, navy and green. The Joseon women's clothes were comprised of skirts with folded hem, coat with round collars, wide leg pants, Jangot, long-sleeved coat with folding collars, and quadrangular pieces of cloth in various sizes, or mu and so forth. Joseon women's clothes, like men's wears, partake of active functions in their headgears, wide leg pants, styles in short front and long back, and coat with round collars.

• Korean Institute of Interior Design Journal
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• no.36
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• pp.22-29
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• 2003

Most of the studies on traditional houses dealt with the exiting houses which were constructed Chosun Dynasty. But It is to be classified into many items which were point of view period, regional group and social condition. The purpose of this study Is compare early-Chosun Dynasty with late-Chosun Dynasty that the Visual Structure of traditional houses in Yang-Dong village. Early-Chosun Dynasty and late-Chosun Dynasty of traditional houses were well preservation in Yang-Dong village. Therefore traditional houses in Chosun Dynasty are able to classified according to period type of Early-Chosun Dynasty and late-Chosun Dynasty, which a study on the compare spatial composition of traditional houses in Yang-Dong village.

• Proceedings of the KIPE Conference
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• 2013.11a
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• pp.21-22
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• 2013

조선 작업장에서 사용되는 에너지원 중 전기 에너지의 30% 이상이 압축공기 생산에 사용되고 있으며, 압축공기의 상당 부분은 공압 공구 구동에 사용되고 있다. 본 연구에서는 에너지 효율이 낮은 공압 공구를 전동 공구로 대체하기 위해 7인치 BLDC모터 전동 그라인더 시제품을 개발하였다. 7인치 공압 그라인더와 대등한 성능을 내기 위한 전동 그라인더의 사양은 정격 회전수는 4,500 rpm이며 정격 출력은 1.1 kW가 되어야 함을 알 수 있었다. 특히 안전 기능으로 과부하 정지 기능과 정전 재기동 방지가 가능해야 한다. 이러한 사양과 기능으로 BLDC 모터 전동 그라인더 시제품을 제작하여 조선 작업장의 여러 공종에서 테스트 한 결과 다양한 장단점 의견을 얻을 수 있었다.

• The Journal of Korean Medical History
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• v.21 no.1
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• pp.47-52
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• 2008

The Chosun dynasty woman doctors served important roles as professional doctors. Most of these woman doctors are believed to have been either assistants to their male counterparts or specialists for certain limited fields such as gynecology. Despite such circumstances, some woman doctors such as 장덕 or 귀금 were even mentioned in the 조선왕조실록 for their outstanding abilities. In such cases where a doctor was recognized for their skills, they were entitled to higher social status and/or financial benefits.