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- 저자 : 장세영 ( Seyeong Jang ) (검색결과 4 건)
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장세영 ( Seyeong Jang ),최훈도 ( Hoondo Choi ),유장호 ( Jangho Yu ),남기찬 ( Kican Nam ) 한국로지스틱스학회 2017 로지스틱스연구 Vol.25 No.4
본 연구에서는 부산지역 항공화물 운송 추이, 부산항 Sea&Air 복합운송 화물 운송 추이 등의 실태파악과 지역별 수출입 항공화물 발생량을 기준으로 이동경로 분석, 포트폴리오 분석을 수행함으로써 부산지역 항공화물 유치를 위한 정책대안 제시를 연구의 목적으로 하였다. 부산 지역에서 발생하는 항공화물의 약 60.0%를 차지하는 12개 해외 발생지역을 대상으로 정적 및 동적 BCG 매트릭스 분석 결과를 고려하여 최종 마케팅 대상 항만을 선정하였다. 먼저 Frankfurt, Singapore, Xianyang, Chicago, Bangkok, Amsterdam, Doha 지역은 부산지역 항공화물 유치를 위한 마케팅 핵심 지역으로 포함되었으며 지속적인 마케팅이 필요한 지역은 Leipzig, Pudong, Los Angeles, Hong Kong, Tokyo-Narita 지역으로 선정되었다. The present study aims to present alternative policies to increase the air cargo volume in Busan by analyzing the current status of air cargo transportation and of Sea&Air combined transport system in Busan, as well as examining transport routes and utilizing portfolio analysis on the basis of air freight volumes of import/export by region. The Static BCG matrix analysis of 12 overseas destinations accounting for approximately 60% of all air cargo transportation in Busan suggests that Frankfurt is only located in ‘Cash Cows’ while Singapore, Xianyang, Leipzig, Pudong, Chicago, Los Angeles come to belong to ‘Question Marks’. With none in ‘Stars’, ‘Dogs’ includes Doha, Bangkok, Tokyo-Narita, Hong Kong and Amsterdam. The dynamic understanding of BCG matrix puts Frankfurt into ‘Cash Cows’ from ‘Dogs’, with Singapore having moved to “Question Marks’ from “Stars”. Xianyang and Chicago in “Question Marks” tend to go over to “Stars”, while such highly-sensitive-to-the-trend countries as Doha, Leipzig, Pudong see the possibility of shifting towards “Stars” in the future. It also shows Los Angeles and Tokyo in “Dogs” are in the middle of shifting to “Question Marks”, and Hong Kong and Amsterdam are remaining at “Dogs” with no distinct change.
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윤대옥 ( Daeok Youn ),장세영 ( Seyeong Jang ) 충북대학교 과학교육연구소 2016 과학교육연구논총 Vol.31 No.2
Wind blowing across the ocean surface generates most ocean waves along an interface between air and water. As the waves approach the shore, the waves break in the surf zone near the seashore. Focussed on the natural phenomenon of breaking waves, a laboratory ocean wave experiment is designed to help students understand physical changes of a ocean wave even in a small classroom. A long water tank filled with water and plastic waterproof panels to generate water waves are needed to carry out the experiment. While students conduct various experimental works like generating and observing waves, they can efficiently understand concepts related to ocean waves such as the classification of waves, types of breaking waves, the movement of water particles and even how to make waves properly. We here present an experiment design with the principle of ocean waves as a teaching material.
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임형섭(Hyungsub Lim),정종인(Jongin Jung),장세영(Seyeong Jang) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
In this paper, we present a secondary path modeling method based on the number of occupants in the vehicle when we construct an active noise control system. In most ANC systems, a system that is not optimized for the number of occupants is designed and constructed when modeling the secondary path. The disadvantages of these systems are that the convergence performance of active noise control will decrease as the number of occupants changes and the risk of a loud bang noise may also be increased. To avoid these problems, we propose a method to change the number of occupants to measure the correct secondary path and activate active noise control with a system optimized for the number of occupants. We can confirm that an improved active noise control system configuration is possible through modeling and simulation experiments using the proposed method.
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능동소음제어 성능향상을 위한 탑승자 위치 기반 2차 경로 모델링 컨셉 연구
임형섭(HyungSub Lim),정종인(JongIn Jung),장세영(SeYeong Jang) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
In this paper we present secondary path modeling based on occupants position for active noise control system. In most ANC systems, the secondary path filters are constructed by designing the system without considering the position of the occupants in the modeling of the secondary path. The disadvantage of such a system is that the convergence of noise control is impaired when the occupant"s position changes from the optimal position designed for secondary path modeling. To avoid this issue, this thesis allows optimal feedback to be provided to occupants by considering the location of the occupants in the secondary route modeling and configuring the active noise control system by referring to the various secondary routes designed for this purpose. Experimentation with modeling and simulation using the proposed method has shown that the convergence performance of active noise control systems is improved.
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