Towards Future Mobile Network: Harnessing the Transformative Nature of NFV and SDN

이동기,박종한,박진효,Lee, D.K.,Park, Jong-Han,Park, Jin-Hyo The Korea Institute of Information and Commucation 2014 정보와 통신 Vol.31 No.6

Mobile operators today face yet another critical challenge as technology lifecycle becomes increasingly short and also as heterogeneous and complex network becomes exceedingly expensive and difficult to manage. With extremely competitive market and demanding users, the overall revenue structure is expected to get worse. A network architecture based on software-defined networking (SDN) and virtualization techniques gives operators greater opportunity to build cost-effective and efficient alternative to the legacy. In this work we review our Carrier Cloud as a future mobile network infrastructure that exploits both SDN and NFV in order to increase the operator agility, reduce the cost, and even disrupt the vendor landscape. This new architecture will not be fully adopted by the conservative operators at once. Technological hurdles have to be overcome, and a clear understanding of operational differences must be preceded.

회원작품 - 오송팜본사

이동기,Lee, Dongki 대한건축사협회 2017 建築士 Vol.576 No.-

2022 양계업 결산 - 2022 채란업 결산

이동기,Lee, Dong-Gi 대한양계협회 2022 월간 양계 Vol.54 No.12

벤처기업의 R&D 투자와 성과에 관한 실증연구

이동기,이철규,김정환,Lee, Dong-Ki,Lee, Cheol-Kyu,Kim, Jung-Hwan 한국벤처창업학회 2008 벤처창업연구 Vol.3 No.1

In this research, an empirical analysis was performed to determine the correlation between management performance and Empirical Research on the R&D investment for domestic venture businesses in each industry. Specifically, an empirical analysis for each industry was attempted not only to clarify the general hypothesis on the relationship between management performance and R&D investment for venture businesses but also to demonstrate that differences exist for each industry. Empirical analysis was conducted for eight industries with respect to the $2002{\sim}2006$ panel data extracted as investigative results from the "Investigation Report on Science and Technology R&D Activities" published by the Ministry of Science and Technology. Industrial classification was limited to the middle-level classification (2-digit) in the Korea Standard Industry Code (KSIC) owing to the limited number of panels. Although this research only verified the overall positive effect of R&D activities and funds for existing research on corporate value or productivity and management performance, it was able to document the difference for each individual industry and each business size unlike existing research. Furthermore, the reliability of the research results was enhanced by targeting companies that have been continuously conducting R&D and management activities using consistent 5-year panel data in the analysis. Again, this was something that existing research did not have. Finally, through the use of recent data from 2002 after the IMF economic crisis up to 2006 in the empirical analysis, this research proposed the problems due to the prevailing circumstances at the time of entering the advanced nation stage based on an empirical analysis; the prevailing problems during the pursuit of advanced nation status before the IMF crisis broke out were not tackled. The key empirical analysis yielded several results. First, capital and size of the labor force have a positive correlation with the management performance for the entire company or the venture business. This applies to all eight industries as the subjects of the analysis. Second, although the number of years since a company has been established can have positive or negative correlation with management performance for the entire company or venture business in specific industries, a definite overall trend cannot be identified. Third, R&D investment can be said to have an overall positive effect on corporate management performance. Fourth, the size of the research staff cannot be said to be a factor unilaterally affecting the management performance of the entire company or the venture business. Fifth, the number of years a research institute has been in operation, which was assumed to have a positive effect on the management performance of a company because of the accumulated R&D know-how -- definitely acts as a positive factor contributing to the management performance of a company.

소아 급성 세균성 신엽염의 임상상 및 신장 예후

이동기,권덕근,임윤주,신윤혜,윤석남,배기수,Lee Dong-Ki,Kwon Duck-Geun,Lim Yun-Ju,Shin Yun-Hye,Yun Suk-Nam,Pai Ki-Soo 대한소아신장학회 2004 Childhood kidney diseases Vol.8 No.2

목적: 소아에서 드문 질병인 급성 세균성 신엽염의 질병 성격을 살피기 위하여, 9명의 환아를 대상으로 발현 증상, 임상 경과, 치료 반응, 동반 요로 기형, 신장 손상 정도 등을 조사하였다. 방법: 1994년 9월부터 2004년 8월까지 복부 초음파 또는 복부 컴퓨터 단층 촬영을 통하여 신엽염으로 확진된 9명의 환아를 대상으로 진료 기록을 후향적으로 분석하였다. 결과: 대상 환자들의 연령분포는 1개월에서 6세까지 평균 $2.8{\pm}2.2$세였으며, 성별로는 남자 6명 여자 3명이었다. 발열 및 오한은 모든 환자에서 있었고, 그 외 복통, 배뇨곤란 및 빈뇨가 있었다. 내원 당시 시행한 검사실 검사상, 백혈구수 $21,000{\pm}5,600/uL$, ESR $60{\pm}23mm/hr$, CRP $17{\pm}10\;mg/dl$이었으며. 혈액 배양 검사는 모두 음성이었다. 소변 검사상, 농뇨 및 현미경적 혈뇨는 모든 환자에게 있었고, 치료후 농뇨가 소실되기까지 $10.5{\pm}7.8$일이 소요되었다. 복부 초음파 검사상, 신장에 국소적으로 경계가 불명확하면서 에코가 떨어져 있는 신엽염 소견이 5명(55.5%)에서 관찰되었다. 복부 컴퓨터 단층 촬영에서는 불명확한 경계를 띠고 조영제에 증강이 잘 되지 않는 쐐기 모양의 신엽염의 소견이 모든 환자에서 관찰되었다. 방광요관역류는 3명(33.3%)에서 있었으며, 모두 3단계 이상이었다. $^{99m}Tc-DMSA$ 스캔에서는 일측 또는 양측 신장의 피질 손상이 확인되었다. 4개월 후 추적한 스캔상, 6명중 2명(33%)은 이전에 비해 병변의 크기가 감소되었으나, 나머지 4명(67%)은 병변의 크기가 불변 또는 약간 악화된 소견이었다 환아의 총 발열기간은 $11.8{\pm}6.3$일로, 이중 입원전 기간은 $4.0{\pm}3.0$일, 입원후 기간은 $7.8{\pm}5.5$일이었다. 입원 기간은 7일에서 31일까지 평균 $17.2{\pm}8.1$일이었다. 결론: 요로감염 환아에서 치료 후에도 1주이상 발열, 농뇨, 높은 혈액 염증 수치가 지속될 경우 '급성 세균성 신엽염'을 적극 의심하여야 하며, 질환의 정확한 진단을 위하여 신장 초음파검사 보다는 컴퓨터 단층 촬영을 우선 실시할 것을 제안하는 바이다. Purpose: This study was perfonned to elucidate the clinical pictures of acute focal bacterial nephritis(nephronia) in children. Methods: We reviewed 9 children with nephronia diagnosed by ultrasonography or computed tomography of kidneys from September 1994 to August 2004. Results: The overall male to female ratio was 2:1, and the age distribution ranged from 0.1 to 6 years(mean $2.8{\pm}2.2$). The cardinal symptoms were fever, chills, abdominal pain and dysuria/frequency. The initial leukocyte count was $21,000{\pm}5,600/uL$, ESR $60{\pm}23mm/hr$, CRP $17{\pm}10\;mg/dl$. Pyuria was noted in every patient and persisted for $10.5{\pm}7.8$ days after antimicrobial treatment. Abdominal sonography demonstrated focal lesion of ill-defined margin and low echogenicity in 5 of 9 patients(55.6%), while computed tomography revealed nonenhancing low density area in all patients(100%). Three of 9 patients(33.3%) had vesicoureteral reflux, greater than grade III. The initial $^{99m}Tc-DMSA$ scan showed one or multiple cortical defects in every patient, and improvements were noted in 2(33.3%) of 6 patients who received follow up scan after 4 months. Intravenous antibiotics was given in every patient under admission. Total febrile period was $11.8{\pm}6.3$ days(pre-admission, $4.0{\pm}3.0;$ post-admission, $7.8{\pm}5.5$ days) and the patients needed hospitalization for $17.2{\pm}8.1$ days. Conclusion: For the early diagnosis of 'acute focal bacterial nephritis' we should perform renal computed tomography first rather than ultrasonography, when the child has toxic symptoms and severe inflammatory responses in blood and urine.

해외르포 - 네덜란드 양계산업 - 동물복지 정책으로 케이지 사육 급감

이동기,Lee, Dong-Gi 대한양계협회 2012 월간 양계 Vol.44 No.3

표준.시험인증 기술 동향 - iOS7을 중심으로 살펴본 무선 메시 네트워크 서비스 기술 동향

이동기,Lee, Dong-Gi 한국정보통신기술협회 2014 TTA저널 Vol.153 No.-

특집 - 검정연구소 현황 및 향후 과제 - '검정연구소' 제2의 도약을 위해 - (부지이전을 통한 새로운 방안 모색)

이동기,Lee, Dong-Gi 대한양계협회 2010 월간 양계 Vol.42 No.2

해외르포 - 네덜란드 산란계 PTC+교육 - 국내 양계 전문가 양성 시급

이동기,Lee, Dong-Gi 대한양계협회 2012 월간 양계 Vol.44 No.2

현대주거의 기하조작에 의한 보이드 공간의 생성과 친환경적 특성에 관한 연구

이동기,Lee, Dong-Ki 한국주거학회 2010 한국주거학회 논문집 Vol.21 No.6

This study is aimed to grasp the spatial characteristics exhibited in the modern housing architecture from the aspect of a geometrical manipulation, which transforms basic geometrical shapes and persue the formative diversity, to identify and verify the various characteristics of spatial structure in modern housing architecture. In this regard, this paper analyze and identify the influences of the void spaces that are created by geometrical manipulations on housing architecture, in terms of morphological and environmental aspects. Theoretical approaches define the concept of geometrical manipulation according to the characteristics of residence and examine the spatial features of void spaces. Additionally, case studies result in the classification of void spaces that are created by geometrical manipulation. Furthermore, to understand environment-friendly characteristics of the void space, the researcher elicited the factors that can affect environment friendly housing from previous studies, and analyzed their correlation between those factors and the void spaces that are classified.