• The Journal of the Convergence on Culture Technology
• /
• v.8 no.3
• /
• pp.605-611
• /
• 2022

This study excludes how to define the concepts and categories of the Ah-ak(雅樂) and Sok-ak(俗樂). In the process from the early Joseon Dynasty to the late Joseon Dynasty, the aesthetic appreciation system of the Ah-Sok(雅俗) in traditional music, which is consistently projected on court music and folk music centered on Pungryubang, was revealed through specific historical records. Through this study, we were able to examine as follow : In the early Joseon Dynasty, the aesthetic of music related to the the Ah-Sok(雅俗) was mainly projected on the court's ritual music and Yeonhyangak-music for korean court banquet-, and in particular, the aesthetic thoughts of Geomungo[玄琴] was at the center. As we descend to the late Joseon Dynasty, the aesthetic of music related to the Ah-Sok(雅俗) has been expanded to the private sector, reflecting the aesthetic of Pungryubang music, and it can be seen that the aesthetic thought of Geomungo[玄琴] was at the center.

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

• TTA Journal
• /
• s.178
• /
• pp.8-13
• /
• 2018

최근 조선 및 해운경기가 급격히 위축되면서 해운사는 보다 많은 이익을 창출하기 위하여 첨단 ICT기술을 도입하여 최소 운항비 최대 이익 창출을 꾀하고 있다. IMO는 새로운 화두로서 자율운항선박이 운항 가능하도록 법적 개념 정립을 2020년까지 완료하도록 계획하고 있다. 산업계는 IMO의 NOx규제 Tier III(3.4 g/kWh, n<130), EEDI($CO_2$ 배출규제)의 Phase 1(Phase 0 대비 10%포인트 감소), Phase 2(Phase 1 대비 10%포인트 감소), EEOI 등 친환경선박 문제가 현안으로 대두되고 있는 상태에서 ICT와 결합하여 친환경 에코선박으로써 스마트선박이 문제를 해결하도록 기대하고 있다. 자율운항선박의 도입에 관해 많은 해운 전문가들 사이에 찬반의 의견이 분분하나 첨단 ICT를 도입하여 최소 운항비 최대 이익 창출을 추구하는 친환경 스마트선박의 도입에 대해서는 해운사 선주, 조선소 모두 앞을 다투고 있는 실정이다. 이러한 시점에서 세계 각 국가가 추진하고 있는 스마트자율운항선박의 연구와 기술 및 표준 동향과 우리나라가 추진하고 있는 연구와 산업계의 동향을 알아보고 새로운 전기를 맞이하게 될 글로벌 조선 산업의 미래를 조명해 보고자 한다.

• The Bulletin of The Korean Astronomical Society
• /
• v.36 no.1
• /
• pp.25.1-25.1
• /
• 2011

우리는 조선시대에 제작된 소규표의 크기와 설치 위치에 관한 연구를 수행하였다. <세종실록>의 기록에 의하면 40척의 규표(이하 대규표)는 1432년(세종 14)과 1437년(세종 19) 사이에 제작되어 간의대 서쪽 옆에 세웠다는 사실은 잘 알려져 있다. 반면 소규표에 대해서는 그동안 잘 알려진 바가 없었다. 그러나 이순지의 <제가역상집>과 기타 여러 문헌 연구를 통해 소규표도 조선전기에 제작되었음을 알 수 있다. 또한 <명종실록>에는 동지와 보름에 대규표와 소규표를 이용하여 해와 달의 그림자길이를 관측한 기록이 있다. 이 연구에는 이러한 소규표 관련 문헌들의 내용을 소개하고자 한다. 아울러 <명종실록>의 기록과 현대 천체역학적 계산을 통해 소규표의 표의 길이는 전통적인 규표의 크기인 8척임을 알 수 있었다. 한편 소규표는 경복궁 간의대 주변에 설치되었던 것으로 보인다. 이러한 연구 결과들은 향후 규표 복원 연구에 매우 유용하게 활용될 것으로 기대된다.

• (The)Study of the Eastern Classic
• /
• no.35
• /
• pp.359-385
• /
• 2009

The study aims to investige how Soupjin, military training has been changed in early Joseon Dynasty. The conclusions are following these. First, Jin means military marching or attacking the enemy and Jinbeop means how to make Jin or traning but now Jinbeop indicates textbook of Jinbeop rather than practing it. Second, publishing Owijinbeop is completed as a result of continuous series of Jinbeop textbook and Owi systems are built up by military construction reorganization. Third, the total number of articles is 268 from Taejo to Seonjo in early Joseon Dynasty. They are divided into different parts according to kings. Forth, Taejo, Taejong, Munjong, Sejo, Yejong and Jungjong are the kings who take the lead of Jinbeop training directly. Among them Munjong and Sejo are highly considered that they edited and revised Sinjinbeop and tried to unify military organization. Besides Jungjong discussed Jinbeop textbooks which are published by prior kings and even make them be practiced. But after Imjinwaeran, Seonjo accepted the book Gihyosinseo by Cheokgyegwang in China and transformed our Jinbeop for protecting the country. Firth, We found that Hyangmyung and Jintoigyjak had been focused from Sejo to Jungjong. Because in this period Joseon had to find the way to protect the country from north Yeojin, But after Imjinwaeran Seonjo introduced Cheokgyegwang's Jeolgangjinbeop in China because of Japanese attacks.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.19 no.1
• /
• pp.77-84
• /
• 2024

This paper introduces a study on an electromagnet magnetic gear designed for gear ratio conversion. In comparison to magnetic gears using permanent magnets, this electromagnet magnetic gear exhibits lower torque density, highlighting the need for torque density improvement. To address this, the research focuses on enhancing torque density by examining the consistent orientation of each rotor's magnetization during gear ratio conversion and attaching permanent magnets accordingly. However, an issue arises due to the uneven magnetic flux density caused by the non-uniform attachment of permanent magnets, leading to an increase in torque ripple. Therefore, building upon previous studies aimed at reducing torque ripple in electromagnet magnetic gears, this research explores the optimal methods, such as pole piece bridges and fillet configurations, to mitigate torque ripple even during gear ratio conversion.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.16 no.3
• /
• pp.471-476
• /
• 2021

Soft magnetic composite (SMC) materials based on powder metallurgy have a number of advantages over the conventional electrical steel sheets commonly used in electric machines. Thus, technologies related to these materials have shown significant improvement in recent years. In general, SMCs are magnetically isotropic owing to the shape of the powder, which makes them suitable for the construction of electric machines with three-dimensional flux and complex structures. However, the materials with isotropic magnetic properties (such as SMCs) have complex vector hysteresis; thus, it is very difficult to predict accurate loss properties. Therefore, we manufactured ring-type specimens of electrical steel sheets and SMC, which analyzed their magnetic properties according to the specimen size, and performed the electromagnetic field analysis of a high-speed permanent magnet (PM) motor driven at 800 Hz or higher using the measured magnetic information to compare the core loss of the motor. The reliability of this paper has been verified by measuring the efficiency after manufacturing the motor.

• (The)Study of the Eastern Classic
• /
• no.57
• /
• pp.437-466
• /
• 2014

This paper, is in the focus of the fact that was popular in the Joseon Dynasty, was clearly private background and fashionable aspects of its creation. In Section 2, as the background of the epidemic of of the Joseon Dynasty, and was derived creative situation of . is the "left Order live music" relationship center rather, was that it was created by the Academy belongs is highlighted "Hanlin year". As a result, collapses the relationship between the order raw Korea early left, in conjunction with the boast to debauchery and evaluated surface Shinyoung of successor Geibun of this academy, be epidemic in the Joseon Dynasty it is the could be. In Chapter 3, and two to the original, it was examined the epidemic surface of of the Joseon Dynasty. The epidemic of surface, in the conventional research and are relatively detailed, but in this paper, while accommodating the existing research results, of consideration "Hanlim feast" has led to Geibun of Korea "immune new Feast" was observed a trend surface is placed around the fact. As a result, , the Joseon is that it has been singing on the occasion official four-kan and Geibun center, first Nara are exempt new feast bonds back to the four Hall again in Geibun, usually it can be seen that it is spread in the Scholar-official and gisaeng's. Lower limit has been singing can be up to around the late 17th century it has been speculated through the time of Gimumanjun.

• The Journal of Korean Philosophical History
• /
• no.43
• /
• pp.267-293
• /
• 2014

This paper is aimed at analyzing the characteristics of Image-Meaning theory focused on image in the early days of the Joseon Dynasty and SongMing period. Zhouyi' theory in the early days of the Joseon Dynasty was constructed on the basis of Zhouyi' theory of SongMing period. The characteristics of Image-Meaning theory in the early days of the Joseon Dynasty can be explained largely by two routes. One is the perspective of critical succession on Zhouyi'theory of focusing on meaning that led Chengyi(程?) and Yangwanli(楊萬裏). As the representative of this route, Gwongeun and Toegye not only asserted Image-meaning theory focused on meaning, but also developed a perspective of taking all the image and meaning. The other is the active succession and creative transformation about Image-Meaning theory of Tushuxue that led Chentuan(陳?) and Shaoyong(邵雍). As the representative of that route, Yulgok and Yeohun explained the schematic diagram of the universe of the universe by using methodology of Tushuxue. Furthermore, they actively succeed Shaoyong' Zhouyi theory to expand Image-Meaning theory focused on number. In addition, Cho, Haoyi(曺好益)described the propositions - "meaning is not out of image area, image equipped with meaning all, then there is no law of limitation in image adopted theory. Those propositions are opposed to Chengyi(程?) and Zhuxi(朱熹)' ZhouYi' theory.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
• /
• v.35 no.5
• /
• pp.488-493
• /
• 2022

Generally, diamond-like carbon films (a-C:H, DLC) have been shown to have a low coefficient of friction, a high hardness and a low wear rate. Pd-doped C thin film was fabricated using a dual magnetron sputtering with two targets of graphite and palladium. Graphite target RF power was fixed and palladium target RF power was varied. The structural, physical, and surface properties of the deposited thin film were investigated, and the correlation among these properties was examined. The doping ratio of Pd increased as the RF power increased, and the surface roughness of the thin film decreased somewhat as the RF power increased. In addition, the hardness value of the thin film increased, and the adhesive strength was improved. It was confirmed that the value of the contact angle indicating the surface energy increases as the RF power increases. It was concluded that the increase in RF power contributed to the improvement of the physical properties of Pd-doped C thin film.