• ETRI Journal
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• 제35권4호
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• pp.666-676
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• 2013

With the recent growth in smartphone services, the "mobile" environment has become a key factor to consider in the design of the future Internet. In this paper, we propose Mobile-Oriented Future Internet (MOFI), which is a new architecture for the future Internet for mobile-oriented environments. The MOFI architecture is designed with three functional features: global identifier and local locator in the identifier-locator separation, query-first data delivery for route optimization, and distributed control of identifier-locator mapping. The proposed architecture and functional operations are implemented and tested using the Linux platform. From the experiment results, we see that the MOFI architecture performs better than the existing identifier-locator separation schemes, such as Proxy Mobile IP and Host Identity Protocol, in terms of data throughout, mapping control overhead, and handover delay.

• 품질경영학회지
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• 제30권4호
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• pp.15-25
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• 2002

This paper considers supplier selection process for e-business & ISO 9001 quality management system environments. Determining suitable suppliers in the electronic commerce has become a key strategic consideration. However, the nature of these decisions is usually complex and unstructured. In this paper, a Quality Estimated Supplier Selection (QESS) model is proposed to deal with the supplier selection problems in the e-business(Business to Business: B to B). In the supplier selection, quality management factors will be considered for the first time, and then price, and delivery etc. In the first level, we deal with the quality management factors such as quality management audit, product test, engineering man-power, capability index and training time etc., based on the five point scale. In the second level, a QESS model determines the final solution by considering factors such as price, production lead-time and delivery time.

• Journal of Pharmaceutical Investigation
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• 제35권3호
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• pp.151-155
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• 2005

A drug delivery system(DDS) for practically insoluble meloxicam was developed and evaluated by dissolution study. A novel DDS is two layered system, where the first layer is consisted of gas-forming agent for an immediate release and the second layer is composed of metolose SR(HPMC) for sustained release. This bilayered tablets were manufactured by using manual single punch machine. The results of dissolution study showed an initial burst release followed by sustained release for the experimental period time. From a pharmaceutical point of view, the designed DDS for meloxicam would be informative system in terms of poorly soluble analgesic medicines.

• 기술혁신학회지
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• 제4권2호
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• pp.198-210
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• 2001

The purpose of this study is to suggest information system focused on the delivery system for national internet shopping mall. It is specifically summarized as follows. First, I showed the necessary required contents for constructing information system focused on the delivery system. Next, I suggested the theoretical model of the necessary information system for practicing information system, which is based on the above contents. The result of this study is to support for constructing information delivery system required for information system of internet shopping mall. And is to do a role of guide for practicing it, which is regarded as constructing a practical business guideline.

• 한국금형공학회:학술대회논문집
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• 한국금형공학회 2008년도 하계 학술대회
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• pp.155-158
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• 2008

Flow imbalance among the cavities was often observed in multi-cavity mold. The flow imbalance affects on the dimensions and physical properties of molded articles. First of all, the origin of flow imbalance is geometrical imbalance of delivery system. However, even the geometry of delivery system is balanced the cavity imbalance is being developed. This comes from the temperature distribution in the cross-section of runner, which is affected by the operational conditions. In this study, experimental study of flow imbalance has been conducted for various injection speeds. This study also suggests new runner design to eliminate flow imbalance in multi-cavity injection mold. Simulation and experimental results showed suggested new designed runner could eliminate or reduce flow imbalance in multi-cavity injection mold.

• 정보관리학회지
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• 제15권2호
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• pp.7-28
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• 1998

본 연구의 목적은 국내외 상업적 문헌제공시스템에 대한 비교우위적 정보를 제공하는데 있다. 이를 위하여 비소장자료에 기반한 시스템, 소장자료 중심의 시스템, 특수주제 중심의 시스템으로 대별하여 현황을 파악한 다음, 각 시스템이 제공하는 주제의 범위와 특성, 원문신청-입수시간, 봉사요금과 지불방식, 신뢰성과 만족률을 기준으로 분석하였다.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2008년도 춘계학술대회 논문집
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• pp.329-332
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• 2008

Flow imbalance among the cavities was often observed in multi-cavity mold. The flow imbalance affects on the dimensions and physical properties of melded articles. First of all, the origin of flow imbalance is geometrical imbalance of delivery system. However, even the geometry of delivery system is balanced the cavity imbalance is being developed. This comes from the temperature distribution in the cross-section of runner, which is affected by the operational conditions. In this study, experimental study of flow imbalance has been conducted for various injection speeds. This study also suggests new runner design to eliminate flow imbalance in multi-cavity injection mold. Simulation and experimental results showed suggested new designed runner could eliminate or reduce flow imbalance in multi-cavity injection mold.

• 전자통신동향분석
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• 제38권3호
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• pp.11-19
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• 2023

Drones, which were early operated by remote control, have evolved to enable autonomous flight by combining various sensors and software tools. In particular, autonomous flight of drones was possible since the application of GNSS-RTK (global navigation satellite system with real-time kinematic positioning), a precision satellite navigation technology. For instance, unmanned drone delivery based on GNSS-RTK data was demonstrated for pizza delivery in Korea for the first time in 2021. However, the vulnerabilities of GNSS-RTK should be overcome for delivery drones to be commercialized. In particular, jamming in the navigation system and low positioning accuracy in urban areas should be addressed. Solving these two problems can lead to stable flight, takeoff, and landing of drones in urban areas, and the corresponding solutions are expected to establish a hybrid positioning technology. We discuss current trends in hybrid positioning technology that can either replace or complement GNSS-RTK for stable drone autonomous flight.

• 한국콘텐츠학회논문지
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• 제21권12호
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• pp.688-696
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• 2021

본 연구는 한국과 일본의 약물중독에 대한 서비스 전달체계를 비교하여 한국의 약물중독 대책에 시사점을 제공하는 것이 목적이다. 이러한 연구목적을 달성하기 위한 연구방법은 공적자료를 바탕으로 자료를 수집했으며 수집된 자료의 분석은 국가 간 차이법을 이용하였다. 연구결과 한국과 일본은 약물중독 대처에 표면상으로는 유사한 시스템으로 중독자와 그의 가족을 지원하고 있었지만, 차이점 또한 발견되었다. 한국은 약물중독 대처만을 위한 기구가 없으며, 단약이 어렵고 재발이 쉬운 중독임에도 불구하고 지속적인 원조가 미흡하다는 점이 발견되었다. 이러한 문제를 해결하기 위한 제안으로 첫째, 약물중독만을 위한 대처가 필요 둘째, 통합적인 서비스 전달체계 안에서 긴밀하고 상호보완적인 연계 셋째, 치료와 재활에 대한 지속성과 적절성이 필요, 넷째, 예방 교육의 콘텐츠가 필요함을 제언했다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2007년도 추계학술대회 및 제23회 정기총회
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• pp.319-321
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• 2007

엘엔지운반선(LNGC)의 대형화에 따른 잇단 대형선의 건조과정을 살펴보고 향후의 발전과정을 살펴보도록 한다.