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양태현(Yang, Tae-Hyeon),천득염(Cheon, Deuk-Youm) 대한건축학회 2011 대한건축학회논문집 Vol.27 No.12
The wooden stupa of Nungsa was reconstructed with special references to construction resources of Baekje and adjacent countries of the period. In this study, the construction of underpinning of the stupa was analyzed in comparison with 5-story stupa of Buepryungsa temple in Japan and other domestic relics. Regarding the elevation scheme of the structure, it was compared with the elevation proportion of stupa in the Baekje period. And the analysis brought out the following results. The construction method of Nungsa 5-story and elevation form technique applied in wooden stupa shall be used as a basic indirect resource to prepare restoration plans for Baekje wooden stupa.
조선말기 궁궐건축의 다포계 공포의 살미 조형에 관한 연구
양태현(Yang Tae-Hyeon),천득염(Cheon Deuk-Youm) 대한건축학회 2011 대한건축학회논문집 Vol.27 No.8
The architectures of DaPo type had developed being used for the main buildings of palaces and temples, the development has been more specially on the design than the construction. The existing buildings like the Kunjongjon in GyeongBok-gung, the Injungjun in the Changduk-gung and the Junghwajeon, in the Deoksu Gung are Royal Palaces including the technical and the idea from the epoch when Salmi(an elaborate curlicue ornamentation at the top of a pillar) had spent years perfecting its design. The Korean traditional wooden architectures have developed and been more important on an overall harmony than in part. SalMi is really necessary for the formation of GongPo(bracket) and in suit with the architectures, being changed from the length to diagonal lines angle to diagonal cuttings angle to curvature on the DanBu(end of zones) The efforts for the design had sublimated the balance and harmony, it was enough to appear the great glory and magnificence on the architectures of Dapo type of the 19th royal palaces with Chogak style and Wungong style. The aim of study is to understand the feature of SalMi considering the length, the diagonal lines angle, the diagonal cuttings angle and curvature on the DanBu on the architectures of Dapo type of the 19th royal palaces.
DEA-Window와 Malmquist분석을 활용한 연안화물선사 운영효율성에 관한 연구
양태현 ( Yang Tae-hyeon ),박성훈 ( Park Sung-hun ),김동명 ( Kim Dong-myung ),이해찬 ( Lee Hae-chan ),여기태 ( Yeo Gi-tae ) 한국해운물류학회(구 한국해운학회) 2020 해운물류연구 Vol.36 No.3
본 연구는 연안화물선사의 동태적 효율성과 운영방안을 제시하기 위하여 DEA분석을 수행하였다. 분석대상 업체(DMU)는 연안화물만을 수송하는 업체 중 2018년 매출액 기준 연안화물선사 상위 12개 업체를 선정하였다. 동태적 효율성 변화를 살펴보기 위하여 2008년부터 2017년까지 10개년 자료를 수집하여 DEA-Window 분석을 수행하였다. 분석결과 주로 남해권역에 있는 업체들의 효율성이 높았으며, 시기별로 효율성이 급격히 변화하는 선사의 경우 내항화물운송수입의 감소 혹은 다른 선사들의 효율성 감소로 인한 상대적 효율성 증가로 이어졌음을 알 수 있었다. 분석결과를 통해 연안화물선사의 운영효율성을 강화하기 위해서는 적정선복량 관리 방안, 생산성 향상을 위한 기술변화 요구, 연안해운 인프라 개선, 노후선박에 대한 지원정책이 필요한 것으로 나타났다. 본 연구는 기존에 확보하기 어려웠던 연안화물선사들의 데이터를 수집하고, 연안화물선사의 매출원가에 해당하는 선비, 선원비, 유류비, 운항비를 모두 변수로 사용함으로써 기존 연구에 비해 실증적인 연구를 수행하였다는 점에서 연구의 차별성이 있다. The aim of this research is to obtain the operational efficiency of coastal cargo shipping companies using DEA-Window and Malmquist analysis. The analysis targets (DMU) selected the top 12 coastal cargo carriers based on sales in 2018. The DEA-Window analysis was performed by collecting 10-year data from 2008 to 2017 to examine dynamic efficiency changes. According to the analysis, the efficiency of the companies in the South Sea area was high, and the efficiency of the shipping companies, which changed rapidly over time, led to a decrease in the internal cargo transportation revenue or a decrease in the efficiency of other shipping companies. According to the analysis results, in order to strengthen the operational efficiency of coastal cargo carriers, proper ship volume management measures, demands for technological changes to improve productivity, improvement of coastal shipping infrastructure and support policies for old ships are needed. This study has implication in that it has conducted empirical research compared to previous studies by collecting data from coastal cargo carriers that were previously difficult to secure and using all of the shipping, crew, oil, and operating expenses that correspond to the cost of sales of coastal cargo carriers as variables.
양태현(Yang, Tae-Hyun),이정우(Lee, Jung-Woo),박진수(Park, Jin-Soo),이원용(Lee, Won-Yong),김창수(Kim, Chang-Soo) 한국신재생에너지학회 2007 신재생에너지 Vol.3 No.1
The fuel cells for portable application are attracted using a liquid fuel such as methanol and chemical hydride solutions. Recently, DBFC [Direct Borohydride Fuel Cell] is a candidate for power of portable electronic devices. In this work, the anion exchange membrane and non-precious catalyst for the DBFC were concerned. Anion-exchange membrane was fabricated by amination of polysulfone followed chloromethylation. Non-precious catalysts such as raney-Ni and Ag were used as an anode and cathode catalyst. The optimum conditions of catalyst slurry mixing and MEA fabrication were developed. The single cell performance using anion exchange membrane and non-precious catalyst was evaluated and the results were compared with cation exchange membrane [Nafion membrane] and precious catalysts.
양태현(Yang, Tae-Hyun),이원용(Krishnan, Palanichamy),김창수(Lee, Won-Yong),Kim, Chang-Soo 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
Hydrogen generation by the hydrolysis of aqueous sodium borohydride (NaBH₄) solutions was studied using IRA-400 anion resin dispersed Pt. Ru catalysts and Lithium Cobalt oxide (LiCoO₂) supported Pt, Ru and PtRu catalysts. The performance of the LiCoO₂ supported catalysts is better than the ion exchange resin dispersed catalysts. There is a marked concentration dependence on the performance of the LiCoO₂ supported catalysts and the hydrogen generation rate goes down if the borohydride concentration is increased beyond 10%. The efficiency of PtRu- LiCoO₂ is almost double that of either Ru-LiCoO₂ or Pt-LiCoO₂ for NaBH₄ concentrations up to 10%.