• 종축개량
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• 제12권6호통권76호
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• pp.77-79
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• 2007

• 월간포장계
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• 통권79호
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• pp.103-106
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• 1999

• 보일러설비
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• 통권111호
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• pp.88-93
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• 2003

• 제품안전
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• 통권122호
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• pp.33-35
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• 2004

• 제품안전
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• 통권122호
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• pp.40-43
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• 2004

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전기물성,응용부문
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• pp.161-164
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• 2001

Transmuted impurity atoms formed in neutron-irradiated ZnO thin films were theoretically identified first and then experimentally confirmed by Photoluminescence (PL). ZnO thin films grown by plasma-assisted molecular beam epitaxy were irradiated by neutron beam at room temperature. Among eight isotropes naturely exiting in ZnO films, only $^{64}Zn$, $^{68}Zn$, $^{70}Zn$ and $^{18}O$ were expected to transmute into $^{65}Cu$, $^{69}Ga$, $^{71}Ga$ and $^{19}F$, respectively. The concentrations of these transmuted atoms were estimated by considering natural abundance, neutron fluence, and neutron cross section. The neutron-irradiated ZnO thin films were characterized by PL. In the PL spectra of these ZnO thin film, the Cu-related PL peaks were seen, but the Ga- or F-associated PL peaks were absent. This observation demonstrates the existence of $^{65}Cu$ in the ZnO. In this paper, emission mechanism of Cu impurities wil1 be described and the reason for the absence of the Ga- or F-associated PL peaks will be discussed.

• Applied Science and Convergence Technology
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• 제24권4호
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• pp.111-116
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• 2015

The graphene oxide (GO) and graphene oxide quantum dots (GOQDs), which have gained research interest as new types of light-emitting materials, were synthesized by the modified Hummers method for oxidation of graphite flake and graphite nanoparticle. The optical properties of GO and GOQDs have been compared by mean of photoluminescence (PL), PL excitation (PLE), UV-vis absorbance, and time-resolved PL. The GO have an absorption peak at 229 nm and shoulder part at 310 nm, whereas the GOQDs show broad absorption with a gradual change up without any absorption peaks. The PL emission of GOQDs and GO showed the green color at 520 nm and the red color at 690 nm, respectively. The red emission of GO showed faster PL decay time than the green emission of GOQDs. In particular, the temporal PL profile of the GO showed redshift from 560 nm to 660 nm after the pump event.

• 격월간물류
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• 통권20호
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• pp.27-31
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• 2007

• 동아시아경상학회지
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• 제7권4호
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• pp.15-26
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• 2019

Purpose - The purpose of this paper is to examine total logistics concept performed by 3^rd party logistics, managing with 4th party logistics to achieve more efficient and systematic dealing with sub-functions of physical distribution process. Research design and methodology - The research method to be adopted is first to review 3th party logistics providers that has attracted to various functions of 4PL, and then total logistics concept to be investigated which is related to 3 PL and 4 PL. Results - For the total logistics concept implemented by 3PL, management technique should be widen, then 3 PL's service activities and area should extend. Especially for the collaboration effects between the company and external organizations, it can be collaborated with some commitments in terms of their own independent activities, carrying on inherent functions by both 3PL and 4PL, pursuing total logistics concept. Conclusions - More areas of logistics service has been required by clients in the field, and service activities available is strongly related to roles of 3th party logistics providers as main player in logistics market. However, total logistics management is could be implemented by 3PL combining with various functions of logistics service offered by 4th logistics provider.

• 디지털융복합연구
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• 제18권5호
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• pp.169-178
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• 2020

경쟁력 있는 물류서비스를 제공받고자 하는 화주기업에게 3PL 기업의 선택은 중요한 과정이다. 하지만 소비자인 화주기업의 관점에서 3PL 기업을 선정하는데 영향을 미치는 요인을 분석한 연구는 부족한 상황이다. 이러한 측면에서 본 연구는 전문가의 지식을 효율적으로 추출하여 계량화할 수 있는 CFPR (Consistent Fuzzy Preference Relations) 방법을 활용하여 국내 화주기업이 3PL 기업을 선정할 때 활용하는 요인을 추출하고, 요인별 가중치를 제시하는 것을 연구의 목적으로 하였다. 분석결과 대요인은 "운영요인"이 가장 중요한 것으로 나타났으며, 다음으로는 "전략적 요인", 마지막으로 "의사소통 요인"이 중요한 것으로 나타났다. 복합 가중치의 결과를 살펴보면 "비용절감"이 가장 중요한 요인으로 나타났으며, "업체의 전문성", "재고관리능력", "인적자원관리" 등의 순으로 나타났다. 본 연구는 화주사 측면에서 3PL 기업을 선정할 때 고려하여야 하는 핵심요소를 제시하였으며, 3PL 기업 측면에서는 화주사가 중요하게 고려하는 요인들을 강화하여 향후 화주사의 만족도를 향상시킬 수 있는 기초자료를 제공하였다는 점에 산업적인 시사점이 있다. 향후연구에서는 화주를 산업별로 구분하고, 각 산업별 화주사가 3PL 기업 선정할 때 발생하는 요인의 차이점을 분석할 필요가 있다.