• Title/Summary/Keyword: Shipping environment

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Routing Protocol of Shipping Container Network suitable for Port/Yard Stacking Environment: SAPDS(Simple Alternative Path Destined for Sink node) (항만/야적장 적치 환경에 적합한 컨테이너 네트워크 라우팅 프로토콜: SAPDS(Simple Alternative Path Destined for Sink node))

  • Kwark, Gwang-Hoon;Lee, Jae-Kee
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.36 no.6B
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    • pp.728-737
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    • 2011

  • For the real time monitoring and tracking of shipping container which is one of the core objects for global logistics, Wireless Ad-Hoc Network technology might be needed in stacking environments such as ports, yards and ships. In this paper, we propose a container network routing protocol suitable for port or yard stacking environments which include some constraints such as shadow area problem from metal material, frequent movement of container, etc. With this protocol in which a mesh network algorithm is applied, every container data packet can be delivered to the sink node reliably even with frequent join/leave of container nodes. As soon as a node on path gets malfunction, alternative backup path is supported with notice to neighbor node, which makes constant total optimal path. We also verified that the performance of proposed protocol is better than AODV, one of previous major MANet(Mobile Ad-Hoc Network) protocol with a function for alternative path, which says the proposed protocol is better for frequent join/leave and variable link quality.

  • https://doi.org/10.7840/KICS.2011.36B.6.728 인용 PDF KSCI

The Effect of Organizational Characteristics in the Vessel with Foreign Crews on the Self-efficacy and Organizational Commitment

  • Chung, Young-Sub;Shin, Yong-John;Pai, Hoo-Seok;Kim, Hyun-Duk
    • Journal of Navigation and Port Research
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    • v.31 no.2
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    • pp.127-132
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    • 2007

  • The primary purpose of this study is to examine empirically the effect of the organizational characteristics in the vessel with foreign crews on their self-efficacy and organization commitment. Currently, the restrictions on the employment of the foreign crews are being eased in the Korean shipping industry and many problems are occurring consequently. However, specific and empirical studies on the relevancy of organizational characteristics to the crew's self-efficacy and organizational commitment on board the vessels with combined crews have not yet been carried out. To solve these problems, we examined how the organizational characteristics such as communication and leadership trust of different language and culture related to vessels with combined crews influence on the self-efficacy, job satisfaction and organizational commitment of the foreign crews through SEM analysis. According to the results, hypothesis 1, 2 and 3 were all supported with statistical significance. That means that communication and leadership trust of the vessel with foreign crew had positive effects on their self-efficacy and that such self-efficacy also had a positive effect on the organizational commitment and job satisfaction. To conclude, this study suggests that foreign crew's self-efficacy should be firstly enhanced in order to improve organizational commitment on the vessel with combined crews. Furthermore, studies on self-efficacy of foreign crew's organization are urgently needed to enhance the effectiveness of an organization in a vessel with combined crews that has special environment - working environment with depression and uneasiness due to the exposure to the different language and culture, and excessive stress from the social and psychological adaptation. Therefore, an attempt of this study is considered to be timely since there has not been a study on this subject so far and result of this study will contribute a lot to the organization management of a vessel with combined crews.

  • https://doi.org/10.5394/KINPR.2007.31.2.127 인용 PDF KSCI

Analysis of Conveyance Environment and Pre-treatment on Quality Maintenance of Cut Dendranthema grandiflorum 'Baekma' during Ship Export to Japan (절화 국화 '백마'의 일본 선박 수출 시 수송환경 분석 및 전처리제에 따른 선도유지)

  • Lee, Ja-Hee;Lee, Ae-Kyung
    • Horticultural Science & Technology
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    • v.33 no.5
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    • pp.697-704
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    • 2015

  • This study was carried out to investigate conveyance environment during shipping export to Japan and the optimum pre-treatment of cut Dendranthema grandiflorum 'Baekma'. Shipping from Korea to Japan, which usually takes three to five days, requires keeping the flower at the ideal temperature. When inspection took place in Japan, the ideal temperature was lost and deterioration began. Once the ideal temperature is lost, deterioration takes place. The results of this work showed that vase life was extended by treatment Chrysal RVB and NaOCl compared to the control (distilled water), and Chrysal RVB was used to maintain the flower from bud to full bloom. Bacterial growth was not observed after pretreatment with NaOCl or $ClO_2$. However, $ClO_2$ pre-treatment was observed to affect the early growth period of the bacteria. The chlorophyll content was the highest after Chrysal RVB or NaOCl pretreatment compared to the other treatments. Therefore, these results support pretreatment with NaOCl and Chrysal RVB of Dendranthema grandiflorum 'Baekma' for export to Japan.

  • https://doi.org/10.7235/hort.2015.15055 인용 PDF KSCI