3~5세기 韓·中·日 연안항로의 운용과 변동

유호균 한국상고사학회 2019 한국상고사학회 학술발표회 Vol.50 No.-

두한경(竇漢卿)의 『침경지남(鍼經指南),표유부(標幽賦)』에 관한 연구(硏究)

유호균,김용진 대한한의학원전학회 2007 대한한의학원전학회지 Vol.20 No.2

Alternating Ring-opening Copolymerization of Epoxide and Anhydride Using a Chromium Complex with a Sterically Demanding Amino Triphenolate Ligand

유호균,배대영,임현기,이은성,손경선 한국고분자학회 2020 한국고분자학회 학술대회 연구논문 초록집 Vol.45 No.2

3~5세기 韓·中·日 연안항로의 운용과 변동

유호균 한국상고사학회 2020 한국상고사학보 Vol.110 No.110

아직 육상교통의 어려움으로 인해 해상 교통이 상대적으로 중요했던 고대, 한반도 서남해안 일대를 통과하여 쓰시마-일본열도로 이어지는 연안항로는 한·중·일을 잇는 유일한 국제 교통로였다. 여러 기록으로 볼 때, 적어도 3세기 무렵에는 서남해안을 통해 한·중·일 사이 국제교류가 이루어지고 있었다. 그러나 교류에 이용되는 서남해안을 통과하는 연안항로는 조수간만의 차와 복잡한 지형, 이로 인한 강한 조류와 같은 자연환경으로 인해 안전한 길이라고 할 수는 없었다. 따라서 서남해안 일대를 통과하기 위해서는 각 지역의 항로에 대해 잘 알고 있고 안전한 기항지를 제공할 수 있는현지 세력의 도움이 필요했다. 3세기 한반도 서남해안 일대는 마한·변한 등의 제국(諸國)들로 나뉘어 있던 상태로, 이들을 통합하여 아우를 수 있는 세력이 없었다. 때문에 연안항로 전체를 이용할 수 있었던 것은 중국의 선진 문물을 매개로 각 항·포구 세력의 협조를 얻어낼 수 있었던 한군현 뿐이었을 것으로 보인다. 이시기는 한군현과 중국 문물을 바탕으로 한 서남해안 연안항로를 통한 국제 교류의 성립기라고 볼 수 있다. 한군현과 중국 문물을 중심으로 교류가 이루어지던 서남해안 연안항로는 4세기 무렵, 한군현이 한반도에서 축출당하면서 변화를 겪는다. 교류의 매개체 역할을 하던 한군현이 사라지면서 국제교류가 쇠퇴하고 각지의 세력 사이에 분란이 발생하였다. 이 시기는 서남해안 연안항로의 쇠퇴기라고 할 수 있다. 한군현의 축출 이후 수십여 년간 이어진 서남해안 연안항로의 쇠퇴기를 끝낸 것은 백제세력이었다. 4세기 중반 무렵 백제는 북방의 고구려와 충돌하면서 후방을 안정화시킬 필요가 있었다. 이때 백제가 활용한 수단이 바로 중국의 선진 문물과 서남해안 연한항로였다. 『일본서기』(『日本書紀』) 등의 기록과 고고학 자료 등으로 볼 때 백제는 4세기 중반~후반쇠퇴했던 서남해안 일대의 연안항로의 복원을 통해 서남해안 일대의 항·포구 세력 및 왜와의 교류를 시도한 것으로 보인다. 백제가 이처럼 서남해안 연안항로의 복원을 시도할 수 있었던 것은 한군현의 축출 당시 흡수한 중국 계통의 유이민과 이들이 향유했던 선진 문물 덕분이었던 것으로 보인다. 백제의 주도하에 복원된 서남해안 연안항로는 단순히 그대로 유지된 것이 아니라 이후변화를 거듭했다. 5~6세기, 백제는 고구려와의 대립 구도에서 열세에 처하는 한편, 왜와적대 관계였던 신라가 남해안 일대에서 세력을 확장하는 등 동북아 국제정세는 큰 변화를겪는다. 그럼에도 불구하고 5세기 이후에는 서남해안 연안항로를 보다 유연하게 활용할 수있게 되면서 백제와 항·포구 세력들의 교섭이 확대되었다. 이를 통하여 국제정세의 변화에도 불구하고 서남해안 연안항로는 변동을 통해 국제 교통로로써 생명을 이어갈 수 있었다. 4세기 중반 이후는 서남해안 연안항로의 복원·변동기라고 할 수 있다. In ancient times, when land transportation was weak, the coastal route that passed through the southwestern coast of the Korean Peninsula to Tsushima-Japan Islands was the only international transportation route linking Korea, China and Japan. The history of sea-based exchanges on the southwestern coast dates back to prehistoric times. However, China's Han(漢) Dynasty and its stem force, Han Provinces(漢 郡縣), are the first to use the sea as an international transportation route and record it. This information can be found in the 『Three Kingdoms』(三國志) and 『Huhanseo』(後漢書), which recorded the situation around the third century. Based on records, it is estimated that international exchanges between Korea, China and Japan were taking place on the southwest coast at least in the third century. However, the coastal route passing through the southwestern coast was not a safe route due to natural conditions such as the complicated terrain, tide and strong currents. Therefore, it would have been necessary for local forces to be well aware of the routes of each region and to provide a safe port of call. In the third century, however, there was no unified force that could cover the southwestern coast of the Korean Peninsula. Therefore, it seems that Han Provinces was the only one who was able to use the entire coastal route through China's advanced culture to gain cooperation from the port and port forces. Until the third century, it is believed to be the period of the establishment of a coastal route on the southwest coast based on Han Provinces and Chinese culture. The southwestern coastal route, which used to be centered on Han Provinces and Chinese culture, underwent a change around the 4th century when Han Provinces was ousted from the Korean Peninsula. As Han Provinces, who used to serve as a medium for exchanges, disappeared, international exchanges declined and conflicts began to arise among forces in various regions. This situation seems to have lasted for about half a century since the ousting of Han Provinces in A.D. 314, which is the period of decline of the coastal route along the southwestern coast. It was the Baekje ended the decline of the Southwest Coast route that had lasted for decades following the ouster of Han Provinces. Baekje was one of Mahan's many small kingdoms, but it continued to develop, and in the middle of the 4th century, it was necessary to stabilize the rear as it collided with Goguryeo in the north. At this time, the means utilized by Baekje were the advanced civilizations of China and the Southwest Coast Route. According to records such as 『NihonShoki』(日本書紀) and archaeological data, Baekje seems to have attempted to interact with port forces of the Southwest Coast and Japan through restoration of the coastal route around the Southwest Coast, which declined in the middle to late 4th century. It seems that Baekje was able to attempt to restore the southwestern coastal route thanks to the advanced culture possessed by Chinese-affiliated displaced people who absorbed it at the time of Han Provinces. Restored under the leadership of Baekje, the southwestern coastal route was not simply kept intact, but underwent changes afterwards. In the 5th and 6th centuries, Baekje was inferior in its confrontation with Goguryeo, while Silla, which had hostile relations with Japan, expanded its power along the southern coast. However, the post-fifth century appearance was different from the past when international exchanges declined at the same time as the ousting of Han Provinces. With the development of navigation technology, the southwestern coastal route was more flexible and Baekje's negotiations with port forces were expanded. Through this, despite the changes in the international situation, the southwestern coastal route was able to continue its life as an international transportation route through fluctuations. In this regard, after the mid-4th century, it was ...

MA - SPS 법에 의해 제조한 TiAl 금속간화합물의 기계적 특성평가

유호균,구연규,김세광,김영직,박용호 대한금속재료학회 ( 구 대한금속학회 ) 1997 대한금속재료학회 학술대회 개요집 Vol.1997 No.0

Synthesis of Ultraviolet (UV)-curable Diimide Urethane Acrylates

유호균,임현태,하유미,김윤호,원종찬,김진수 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2

Herein, we synthesized and characterized a series of novel diimide-diols by reacting cyclic dianhydrides with amino alcohols. We also synthesized novel diimide urethane acrylates by reacting diimide-diols with a diisocyanate and a hydroxyacrylate. The structures of novel diimide-diols and diimide urethane acrylates were determined by proton nuclear magnetic resonance (1H NMR) and Fourier-transform infrared (FT-IR) spectroscopy. In addition, the effect of the molecular structure of the diimide on the heat resistance and optical properties (yellow index, haze, and transmittance) of the cured diimide urethane acrylate was investigated.

Ring-opening Copolymerization of Cyclic Epoxide and Anhydride Using a Five-coordinate Chromium Complex with a Sterically Demanding Amino Triphenolate Ligand

유호균,배대영,임현기,조민기,이은성,손경선 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1

An alternating ring-opening copolymerization (ROCOP) of epoxides (cyclohexene oxide, limonene oxide) and anhydrides (phthalic anhydride, naphthalic anhydride and maleic anhydride) was performed using a chromium complex containing a sterically demanding amino triphenolate ligand in the presence of a cocatalyst (bis(triphenylphosphine)iminium chloride (PPNCl) or 4-dimethyl aminopyridine (DMAP)). The polymerization reaction was strongly affected by the types and feed ratio of monomers and cocatalysts. After optimizing the reaction conditions, the chromium complex successfully produced perfectly alternating polyesters in high selectivity (>99% ester linkages), with high molecular weights (up to 43.8 kDa), high glass transition temperatures (T_g up to 159 ℃), and low dispersities. In addition, a small amount of catalyst yielded a turnover frequency (TOF) as high as 380 h^-1

동영상 내의 관심영역(ROI) 설정 및 블록 암호화를 통한 실시간 보안 카메라 시스템 설계

유호균,이광재 대한전기학회 2018 대한전기학회 학술대회 논문집 Vol.2018 No.11

IoT 기술을 활용한 에너지 절약형 전등점멸 초인종 설계

유호균(Ho-Gyun You),김예은(Ye-Eun Kim),김희정(Hee-Jeong Kim),장우희(Woo-Hee Jang),국중진(Joongjin Kook),이광재(Kwangjae Lee) 대한전기학회 2018 전기학회논문지 P Vol.67 No.2

This paper is a system that visually informs the hearing impaired to visit other people by blinking the light of a room using the IoT(Internet of Things) technology. The system combines the power of home-use lights with low-power IoT devices to provide visual notifications. Using a current sensor, this system can track user location and then turns on and off the light in that room only to save energy. The proposed idea can create a society that is equal to everyone and can live more conveniently.

Preparation and Characterization of UV-Curable Imide-Modified Urethane Acrylate Resin Composite with Cyclic Structures for OCR Materials

임현태,유호균,하유미,김윤호,원종찬,김진수 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2

OCR (Optical Clear Resin) materials are a transparent resins that are filled between the touch panel and the display. Acrylic resins not only cure quickly by UV irradiation, but also have advantages such as excellent transparency, eco-friendliness, and low cost. In this study, we synthesized and characterized an imide-based urethane acrylate (imide-UAO) derived from cycloaliphatic dianhydrides. Thereafter, a UV-curable imide-modified urethane acrylate resin composite was prepared by combining the newly synthesized imide-UAO, reactive monomer, and photoinitiator. In addition, the optical properties (yellow index, haze, and transmittance) and adhesive properties of UV-cured composites were investigated to confirm their potential as OCR materials.