• Title/Summary/Keyword: hub university

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Hub Facilities in Vehicle Movement Network between Livestock Facilities (사회연결망 분석을 통한 축산시설 차량이동 네크워크의 허브시설 도출)

  • Lee, Gyoung-Ju;Park, Son-Il;Lee, Kwang-Nyeong;Kim, Han-Yee;Park, Jin-Ho;Hong, Sungjo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.6
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    • pp.137-146
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    • 2018
  • The purpose of this study was to derive and analyze the hub facilities that occupy major positions in the vehicle movement networks of livestock facilities. For this purpose, this study used the KAHIS data provided by Animal and Plant Quarantine Agency. The hub facilities were derived from the degree centrality & betweenness centrality. The analysis results are summarized as follows. First, in a livestock facility's vehicle movement network, there are a small number of hub facilities with very high centrality indicator values compared to other facilities. Second, the hub facilities based on the degree centrality are the feed factory, the milk collecting center, slaughterhouse, slaughterhouse for chicken, and livestock markets. Third, the hub facilities based on the betweenness centrality are the livestock markets, the feed factory, and slaughterhouse. Fourth, hub facilities based on the degree centrality are concentrated in a particular area, but the hub facilities based on betweenness centrality are distributed relatively evenly.

A study on the Development of a Smart city Export HUB Platform based on Korea-ASEAN Public-Private Network (한-아세안 민관 네트워크기반의 스마트시티 수출을 위한 거점 HUB 플랫폼 개발에 관한 연구)

  • Kim, Dae Ill;Kim, Jeong Hyeon;Yeom, Chun Ho
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.26 no.12
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    • pp.1908-1918
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    • 2022
  • Recently, ASEAN is not only a new production base but also a consumer market for Korea, and interest in the utilization of production networks in each region is increasing. In particular, urbanization in ASEAN countries is progressing at a relatively fast pace. Each country is promoting smart city projects combined with ICT to improve outdated basic infrastructure facilities such as housing, transportation, logistics, crime prevention, and disaster prevention. The purpose of this study is to develop a web-based smart city export HUB platform so that companies with excellent domestic smart city solutions can participate in smart city construction through networks with ASEAN countries. These platforms can secure the demand for smart city construction in ASEAN countries, and through the establishment of the Korea-ASEAN public-private network, smart cities planned in ASEAN countries can be promoted more innovative. In addition, it is expected to be positioned as a Global smart city platform model by applying to real cities through collaboration with excellent domestic companies.

SCM Roadmap for the Realization of Northeast Asian Distribution Hub (동북아 물류중심국가 실현을 위한 SCM 로드맵)

  • Kim, Dong-Min;Rhee, Jong-Tae;Nam, Ho-Ki;Kim, Jin-Su;Shin, Hae-Woong
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.29 no.1
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    • pp.116-124
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    • 2006
  • In this paper, we proposed the SCM logistics roadmap in other that the 'Northeast Asian Distribution Hub' policy of the government can be realized more effectively. First, we analysed the requirements of SCM roadmap by examining the situation of Northeast Asian Distribution Hub roadmap, and developed 3 key dimensions of SCM roadmap-national, industrial, and technological dimensions. Second, we suggested integrated SCM on the 4-stage evolution axis, and suggested 9 strategies for realizing the roadmap. Finally, we discussed a cyclical improvement system for the suggested SCM roadmap to keep pace with the change of technical and industrial environment. We expect that the suggested SCM roadmap would be refined by the reaction of logistics groups and various opinions of experts, and become the foundation of execution strategies.

An efficient access control techniques between different IoT devices in a cloud environment (클라우드 환경에서 서로 다른 IoT 장치간 효율적인 접근제어 기법)

  • Jeong, Yoon-Su;Han, Kun-Hee
    • Journal of the Korea Convergence Society
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    • v.9 no.4
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    • pp.57-63
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    • 2018
  • IoT devices are used in many areas to perform various roles and functions in a cloud environment. However, a method of access control that can stably control the IoT device has not been proposed yet. In this paper, we propose a hierarchical multi-level property access control scheme that can perform stable access of IoT devices used in a cluster environment. In order to facilitate the access of the IoT device, the proposed method not only provides the ID key (security token) unique to the IoT device by providing the IoT Hub, but also allows the IoT Hub to authenticate the X.509 certificate and the private key, So that the private key of the IoT device can not be seen outside the IoT device. As a result of the performance evaluation, the proposed method improved the authentication accuracy by 10.5% on average and the processing time by 14.3%. The overhead of IoT Hub according to the number of IoT attributes was 9.1% lower than the conventional method.

A Survey on Green Infrastructure Design Element in Urban Hub Green - Focused on ASLA's Case Studies- (도시 거점녹지유형의 그린인프라 계획요소 고찰 -ASLA 사례분석을 중심으로-)

  • Kwon, Jin Wook;Kim, Gunwoo
    • Journal of Environmental Science International
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    • v.28 no.12
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    • pp.1147-1156
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    • 2019
  • The purpose of this study was to analyze examples of green infrastructure presented by the American Society of Landscape Architects as a part of basic research to assess hub green spaces in cities. With the specific goal of green infrasturcture in mind, the study samples were classified according to their purpose: 'humanities', 'hydrology', 'ecology', and 'environment'. Based on this we assessed the elements of planning for the target sites and obtained the following results. With regard to the aspect of humanities, planning urban hub green spaces was related to the satisfaction in leisure activities and the 'quality of life' that people expect to enjoy at parks or other green areas in general. Rather than focusing on direct and visible benefits, which might come from green infrastructure's technological elements, people hoped that parks and green areas have macroscopic values. For hydrological characteristics, the 'ecologically manages stormwater' was applied the most in planning hub green spaces in cities, and it mainly took the form of technological elements or factors. Third, the planning elements pertaining to ecological characteristics were identified as a combination of strategies and technological elements that 'reintroduces native plants' and 'habitat for wildlife'. As for the plans to instill eco-friendly aspects, the study found that the research on air, climate, weather, heat reaction, soil, energy efficiency, and use and application of resources is important. However, it was difficult to measure the potential quantitative benefits of 'reusing or recycling materials', 'reducing urban heat', and 'cooling air temperature'. The result of this study is meaningful in that it can be used for the assessment of urban hub green spaces in the future.

Some Considerations for a Regional Hub Port In Northeast Asia : with Particular Reference to Korea

  • Moon Seong-Hyeok
    • Journal of Navigation and Port Research
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    • v.28 no.9
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    • pp.783-790
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    • 2004
  • For a nearly decade Busan has been the pre-dominant force in Northeast Asian port community, but during the last couple of years, several competitors have looked to directly challenge Busan's regional dominance, most notably, northern Chinese ports. Faced with this challenging and formidable trend, Busan has had to respond appropriately to ensure that Busan remains a regional hub well into the 21st century. The aim of this paper is to make some considerations for a regional hub container port in Northeast Asia in response to changes in the shipping industry with particular reference to Korea.

The Eligibility of Busan Port as A Hub Port in North East Asia

  • Eui, Hong
    • Korean System Dynamics Review
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    • v.5 no.1
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    • pp.111-126
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    • 2004
  • Many countries in the North East Asia are competing with each other in order to become a centre of international logistics activities. The competition to become a hub port in Far East region is now fierce. The anticipated investments on improving port facilities and attracting the mega carriers are immense for all the ports in the region and the extent of the effort could cripple the local ports and region's economy given the limited financial resources. It is, however, impossible to avoid the disastrous possibility that the massive investments could be channeled into the port, which will never become a hub port, as no port is ready to currently admit defeat and settle as a small regional port. In an attempt to minimise such disastrous waste of resources, ports need to verify the eligibility of their own. This paper tests a system dynamics model using the Port of Busan to understand and illustrate the principle guideline of investment decision making for ports.

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Design and Prediction of Three Dimensional Flows in a Low Speed Highly Loaded Axial Flow Fan

  • Liu, Xuejiao;Chen, Liu;Dai, Ren;Yang, Ailing
    • International Journal of Fluid Machinery and Systems
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    • v.6 no.2
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    • pp.94-104
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    • 2013
  • This paper describes the design to increase the blade loading factor of a low speed axial flow fan from normal 0.42 to highly loaded 0.55. A three-dimensional viscous solver is used to model the flows in the highly-loaded and normal loaded stages over its operation range. At the design point operation the static pressure rise can be increased by 20 percent with a deficit of efficiency by 0.3 percent. In the highly loaded fan stage, the rotor hub flow stalls, and separation vortex extends over the rotor hub region. The backflow, which occurs along the stator hub-suction surface, changes the exit flow from the prescribed axial direction. Results in this paper confirm that the limitation of the two dimensional diffusion does not affect primarily on the fan's performance. Highly loaded fan may have actually better performance than its two dimensional design. Three dimensional designing approaches may lead to better highly loaded fan with controlled rotor hub stall.

An Analysis of the Mediterranean Cruise Ports' Network Using Social Network Analysis

  • Polasek, Adriana Estefania Valero;Yang, Tae-Hyeon;Park, Sung-Hoon;Yeo, Gi-Tae
    • Journal of Navigation and Port Research
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    • v.44 no.2
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    • pp.73-78
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    • 2020
  • The cruise industry in the Mediterranean region increased from 2000-2018, being the second most important region after the Caribbean. The purpose of this study was to analyze the networks and hub ports of the Mediterranean. This paper used the SNA (Social Network Analysis) methodology, which includes Hub and Authority Combined Centrality (HACC) that has been used to analyze cruise port centrality, as well as degree centrality such as In-Degree, Out-Degree, and Betweenness. This empirical study suggests that the top three ports of the Mediterranean ports' network in terms of hub index are Barcelona, Civitavecchia, and Palma de Mallorca. The academic implications are the suggestion for data integration based on real itineraries and numbers of POC (Port of Calls), as well as the selection of the hubs of the targeted areas. The practical implications are suggested such as a clear requirement for cruise industry, as a way to widen the scope for the Mediterranean region and a valuable reference for cruise ship companies to select the best fit home ports.

Design of a Hub BLDC Motor Vector Control System for Patrol vehicle driving (경계형 차량 구동용 허브 BLDC 전동기 벡터제어 시스템 설계)

  • Park, Won-Seok;Son, Min-Ho;Lee, Min-Woo;Choi, Jung-keyng
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2014.05a
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    • pp.380-383
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    • 2014
  • Hub BLDC (Brushless Direct Current) motor is a multi-pole outer rotor-type high-efficiency electric motors and the Direct Drive Motor having permanent magnet rotor to drive shaft of the wheel, also called wheel-in motor. In this study, we design a speed controller with vector control technique using the dsPIC30f2010 16 bit micro-controller to drive Hub BLDC motor. Especially, we propose vector control method which reduce complex operation time, and design directly MOSFET inverter directly which gain high economics.

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