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박판 알루미늄 도금강판의 플라즈마 용접성에 미치는 용접조건 및 롤러의 영향
이태우,박철호,강남현,김명덕,Lee, Tae-Woo,Park, Cheol-Ho,Kang, Nam-Hyun,Kim, Myung-Duk 대한용접접합학회 2012 대한용접·접합학회지 Vol.30 No.2
Al-coated steel sheets with excellent heat and corrosion resistance are widely used in various applications. In welding of thin plate, some defects such as unmelted zone and metal-through occur easily in the beginning and ending of welding line. In the study, the welding defects in Al-coated steel sheets were investigated with respect to plasma arc current, height between Cu block and base metals, and using a roller to align the height of the base metal. Full penetration and voids free welds were obtained with a plasma arc current 52A and weld speed 2.3m/min. An unmelted zone increased and Ericshen rate decreased as the height between Cu block and base metal increased from 0 to 0.6mm. Using a roller moving ahead of the plasma arc, the length of unmelted zone decreased from 1.7mm to 0.5mm.
TiB<sub>2</sub> 분말로 강화된 Cu-TiB<sub>2</sub> 복합재료의 내마모특성
이태우,최종운,강계명,Lee Tae-Woo,Choi Jong-Un,Kang Kae-Myung 한국재료학회 2005 한국재료학회지 Vol.15 No.12
In this study the effect of the content of $TiB_2$ on wear properties was investigated. $Cu-TiB_2$ composites have been fabricated by hot extrusion. Sliding wear tests were peformed by a pin-on-disk type wear test machine under dry condition and loads varied with from 20N to 80N at sliding speed 3.5Hz. The test results showed that the wear losses and the friction coefficients decreased with increasing $Cu-TiB_2$ volume fraction and increasing the size of $Cu-TiB_2$ particle. Wear property of $10{\mu}m,\;5 vol\%\; TiB_2$ specimen was excellent all of the wear specimens. It is thought that the increase of plastic flow resistivity due to uniform distribution of $10{\mu}m,\;5 vol\%\; TiB_2$ wear specimen would improve wear property. The worn surface and wear debris were examined by optical microscope and scanning electron microscope.
Cu-TiB<sub>2</sub> 복합재료의 마모거동에 따른 미세조직 관찰
이태우,강계명,Lee, Tae-Woo,Kang, Kae-Myung 한국재료학회 2006 한국재료학회지 Vol.16 No.8
The dispersion hardened $Cu-TiB_2$ composites are a promising candidate for applications as electrical contact materials. The $Cu-TiB_2$ composites for electrical contact materials can reduce material cost and resource consumption caused by wear, due to their good mechanical and electrical properties. In this study, we investigated the wear phenomenon for $Cu-TiB_2$ composites fabricated with hot extrusion, by varying particle sizes and volume fractions of $TiB_2$. The wear tests were performed under the dry sliding condition with a fixed total sliding distance of 40 m. The contact loads at a constant speed of 3.5 Hz were 20, 40, 60, and 80 N. The friction coefficients and wear losses were measured during wear tests. Worn surfaces and wear debris after wear tests were investigated using the scanning electron microscope and the optical microscope. The microstructures of interface between Cu matrix and $TiB_2$ particle before and after wear tests were studied by the transmission electron microscope.
세계 주요 컨테이너 해운기업의 전략적 제휴의 현황과 그 생성원인에 관한 연구
이태우,김광희,이광희,Lee, Tae-Woo,Kim, Kwang-Hee,Lee, Kwang-Hee 한국항해항만학회 1997 한국항해학회지 Vol.21 No.3
From the beginning of 1990s , also in the shipping industry, especially liner shipping industry competition has been more intensive and difference of the service quality among shipping companies has been learned . On the other hand, a shipping company has some limitations to do its international mission for itself just by broadening service area. For this reason, the necessity for the global strategi alliance among the shipping companies, which is orginally aimed at sharing of facilities and organixation, has been developed. Through strategic alliance, liner shipping companies do not need to input the additional capitals to increase the material assets such as vessel capacity and spread the risk by the enlargement of the market. Also, they can secure the competitive edge through efficient utilizaton of assets. The purpose of strategic alliance of Hanjin Shipping Ltd., can be summarized as follows ; broadening of service area, cost reduction through vessel sharing, realization of rationalized shipping service by terminal and equipment or facilities sharing. Liner strategic alliances are agreement among liner companies to pol their equipment , andterminals for joint operations and services in which each alliance partner continues to serve its market using jointly operated or used inland feeders,inland terminals, port terminals, and mainline fleets of ship as well as joint pools of containers and equipment. Strategic alliances are generally more formal agreements than consortia and impose longer term and far reaching obligation on their members. It also acts as one in developing and advancing the strategic aims of the alliance members. The most important objective for liner strategic alliances is cost reduction and improvement in capital asset utilization. Main aims of strategic alliance drawn in this paper, can be enumerated follows : 1. improvements in service frequency and quality : 2. improvements in vessel and equipment utilization and thereby reductions in fixed and variable cost ; 3. improvements in market shares and high value cargo booking ; 4. reductions in intermodal storage and port terminal throughput costs ; 5. improvements in negotiating powers with ports and feeder transport providers ; 6. reduction in financial and other fixed costs such as insurance; 7. coordination and integration of MIS and EDI systems and service for greater efficiency and market penetration ; and, 8. improvements in logistic chain management and economic of scale by equipment depot, terminal, and vessel sharing.
이태우(Lee, Tae-woo) 대한철학회 2009 哲學硏究 Vol.110 No.-
이 논문의 목적은 그동안 한국철학계에 알려지지 않았던 일제강점기 신문에 나타난 ‘유물-유심 논쟁’이라고 부를 수 있는 철학논쟁의 전모를 소개하고, 이 논쟁의 성격과 논쟁이 지닌 의미를 평가해보려는 것이다. 그동안 한국철학사에서 중요한 ‘철학논쟁’이 많았지만, 이 논쟁은 한국근현대 철학사에서 아직 제대로 소개되지 않은 논쟁으로서, 1929년~1930년에 결쳐 배상하·이관용 등 5명의 필자들이 24회에 걸쳐 『조선일보』의 지상을 빌어 치열하게 펼친 것이다. 논쟁의 시발점인 배상하는 당시의 지배적인 철학관인 유물론적 철학관을 비판하면서 인간의 삶과 사상을 유물이나 유심 일원론으로 환원해서 설명할 수 없다고 한다. 그는 이 양자의 상호관계성을 인정하면서 이 상호관계를 가능케 하는 것은 ‘상호관계자체’, 즉 ‘힘’ ‘작용’ ‘흐름’ ‘정력’ 등으로 표현하고 있다. 이에 대한 반론과 비판이 유물변증법의 입장에서 이관용 등 4인에 의해서 이어진다. 이 논쟁은 외면적으로는 유물론과 유심론을 둘러싼 형이상학적 세계관의 대립이라는 성격을 띠고 있지만, 실제적으로는 현실 이해와 현실 극북의 방법론에 대한 이론 투쟁 또는 사상투쟁적 성격을 동시에 지니고 있다. 이 논쟁은 결과적으로 신문을 통한 ‘철학의 대중화’에 적지 않은 기여를 하였으며, 우리의 주어진 현실을 우리의 언어로 사유하고 표출했다는 점에서 한국철학사에서 그 논쟁사적 의미를 지닌 수 있다. 또한 이 논쟁은 논쟁에 참여한 철학자와 지식인들의 사상적 경향과 당시 한국 지성계 전체의 사상적 지형도를 파악하는데도 중요한 의미를 가질 수 있다. In this paper I attempted to map out the various arguments on Materialism and Idealism during modernizing period of Korea, which was experienced the rapid change of modernization under the colonial rule of Japanese imperialism. These philosophical arguments frequently appeared in the newspapers rather than in the professional periodical, which were yet published. I tried to make assessments of the meaning of this disputes in the socio-political contexts. Korean intellectual history witnesses abundant disputes in terms of philosophical arguments among the thinkers and conflicting ideas. However, this dispute has not been fully introduced or even explored yet in academic arenas. It seems to be one of the most heated arguments and lasted from 1929 to 1930. It was provoked by Bae Sang-ha and Lee Gwan-Yong counterposed against him as a primary debator and 3 other philosophers were seriously involved in it. The arguments appeared 24 times in all in Chosun-Ilbo Newspaper. Bae Sang-ha, who started this dispute, criticizes the Marxist materialism, which was dominant ideal of the time, and asserted that the life and thoughts of the human being could not simply reduced to materialism or idealism only. He recognized the correlation of materialism and idealism, and claimed that in order to make the correlation possible it is necessary to admit th 'correlation itself', namely 'force', 'actions', 'flowing' and 'energetic'. Lee raised objection and criticized Bae Sang-ha's idea. The critical debates of four representatives from the side of dialectical materialism were ensued. During this arguments not only revealed the metaphysical differences between materialism and Idealism externally. but demonstrated theoretical conflicts and ideological confrontations in understanding the historical reality of Korea and the methodology of how to overcome the socio-political reality, which Korea was faced under the imperialism. As a byproduct of this arguments, it also contributed to make 'popularization of philosophy' through the newspaper, and particularly made it possible to use common language of Hangul and apply philosophical ideas in daily languages.In conclusion this debates reveals the intellectual map of the time how much they are involved in philosophical issues and where their intellectual tendency was headed for.