• 대한전자공학회논문지SD
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• 제46권2호
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• pp.24-30
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• 2009

본 논문에서는 3GPP(Third Generation Partnership Project) Release 7 eHSPA(High Speed Packet Access for Evolution) UE(User Equipment) FDD(Frequency Division Duplex) 규격을 만족하는 단말 모뎀의 FPGA(Field Programmable Gate Array) 플랫폼 설계 및 이를 기반으로 한 효율적인 검증 방법에 대해 제안한다. 구현된 FPGA 모뎀 플랫폼은 물리 계층 지원을 위한 모뎀 보드, MCU(Micro Controller Unit)와 DSP(Digital Signal Processor) 코어로 구성되어 모뎀 보드를 제어를 위한 제어 보드, 그리고 RF(Radio Frequency) 및 기타 장비 접속을 위한 주변장치(Peripheral) 보드 등으로 구성된다. 그리고 검증 단계는 하드웨어-소프트웨어 연동 상관 정도에 따라 단순 기능 검증, 시나리오 검증 그리고 호 처리 및 시스템 성능 검증 등으로 규정화하여 진행되었고, 실제 구현적인 측면으로 저 전력 SoC(System On a Chip)를 위한 에뮬레이션 검증 기법도 제안한다.

• 한국전자거래학회지
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• 제10권1호
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• pp.103-120
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• 2005

본 연구의 목적은 VAN에 기반한 EDI(Electronic Data Interchange) 트랜잭션을 사용하는 기업이 ebXML(e-business using XML), 로제타넷 (RosettaNet)이나 웹 서비스와 같은 웹 기반의 개방형 전자거래 프레임워크로 전환해 나갈 수 있도록 전략적인 지침을 제공하는 것이다. EDI가 가지고 있는 다양한 한계들과 웹 기술의 발전에 힘입어 많은 기업들이 인터넷 기반의 B2B 표준들을 채택하고자 한다. 그러나 이들은 기존의 EDI 시스템을 일시에 포기하지 않으면서도 점차적으로 B2B 프레임워크로 전환할 수 있는 방법을 찾고 있다. 따라서 이러한 상황에서 EDI 기업을 위한 효과적인 전환 전략과 지침을 마련하는 것은 매우 중요한 일이다. 본 연구에서 제시된 전략적 지침은 EDI 시스템으로부터 웹 기반의 e-비즈니스 프레임워크로 전환하고자 하는 기업에게 실제적인 가이드라인으로 사용될 수 있을 것이다.

• 천문학회지
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• 제46권3호
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• pp.103-123
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• 2013

Star clusters are superb astrophysical laboratories containing cospatial and coeval samples of stars with similar chemical composition. We initiate the Sejong Open cluster Survey (SOS) - a project dedicated to providing homogeneous photometry of a large number of open clusters in the SAAO Johnson-Cousins' UBV I system. To achieve our main goal, we pay much attention to the observation of standard stars in order to reproduce the SAAO standard system. Many of our targets are relatively small sparse clusters that escaped previous observations. As clusters are considered building blocks of the Galactic disk, their physical properties such as the initial mass function, the pattern of mass segregation, etc. give valuable information on the formation and evolution of the Galactic disk. The spatial distribution of young open clusters will be used to revise the local spiral arm structure of the Galaxy. In addition, the homogeneous data can also be used to test stellar evolutionary theory, especially concerning rare massive stars. In this paper we present the target selection criteria, the observational strategy for accurate photometry, and the adopted calibrations for data analysis such as color-color relations, zero-age main sequence relations, Sp - MV relations, Sp - $T_{eff}$ relations, Sp - color relations, and $T_{eff}$ - BC relations. Finally we provide some data analysis such as the determination of the reddening law, the membership selection criteria, and distance determination.

• 정보학연구
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• 제5권1호
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• pp.157-171
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• 2002

e-Marketplace는 B2B 거래의 한 종류로서 인터넷상에서 불특정 다수의 공급자와 수요자(N:N)간 비즈니스 거래를 유발시켜 주는 가상의 시장인데 전세계적으로 특정 산업에 한정된 수직적인 e-Marketplace와 특정 산업과 관계없는 수평적인 e-Marketplace형태로 발전되고 있다. e-marketplace는 구매자와 판매자에게 제공하는 이점들 때문에 놀라운 속도로 증가하고 있다. 구매자입장에 e-marketplace는 새로운 공급업체를 물색하는 과정에서 들어가는 구매비용을 낮출 수 있다. 공급업체의 경우 e-Marketplace는 판매비용을 낮추고 새로운 고객에게 물품을 납품할 수 있는 기회를 제공한다. 이에 e-marketplace 기업들도 분명한 비즈니스모델로서 경쟁력 있는 업체만이 생존할 것이다. 이러한 생존에서 살아남기 위해서는 치열한 경쟁을 이겨내야 한다. 이에 대한 구매자와 판매자의 역할이 무엇인지를 살펴 보는 것이 본 연구의 목적이다.

• Journal of Korean Neurosurgical Society
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• 제60권3호
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• pp.335-347
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• 2017

Intravenous recombinant tissue plasminogen activator had been the only approved treatment for acute ischemic stroke since its approval in 1995. However, the restrictive time window, numerous contraindications, and its low recanalization rate were all limitations of this modality. Under those circumstances, endovascular stroke therapy went through a great evolution during the past two decades of intravenous thrombolysis. The results of the 2013 randomized trials for endovascular stroke therapy were neutral, although they were limited by insufficient imaging screening at enrollment, early-generation devices with less efficacy, and treatment delays. Huge progress was made in 2015, as there were five randomized clinical trials which all demonstrated the safety and efficacy of endovascular stroke treatment. Despite differences in detail patient enrollment criteria, all 5 trials employed key factors for good functional recovery; (1) screening with non-invasive imaging to identify the proximal occlusion and exclude a large infarct core, (2) using highly effective modern thrombectomy devices mainly with stent retriever, and (3) establishment of a fast workflow to achieve effective reperfusion. The results of those trials indicate that modern thrombectomy devices can allow for faster and more effective reperfusion, which can lead to improved clinical outcomes compared to intravenous thrombolysis alone. These advances in mechanical thrombectomy are promising in the global fight against ischemic stroke-related disability and mortality. Two current mainstreams among such mechanical thrombectomy techniques, "stent retriever thrombectomy" and "direct clot aspiration", are the topic of this review. Stent retriever thrombectomy using Solitaire and Trevo retriever will be firstly discussed. And, the commonalities and the differences between two major clot aspiration thrombectomy techniques; a direct aspiration first pass technique (ADAPT) and forced arterial suction thrombectomy (FAST), will be additionally explained. Finally, details regarding the combination of direct clot aspiration and stent retriever thrombectomy, the switching strategy and the Solumbra technique, will be described.

• Ocean and Polar Research
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• 제27권2호
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• pp.205-214
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• 2005

From ancient Antarctic glacier ice, we extracted total genomic DNA that was suitable for prokaryotic 16S rDNA gene cloning and sequencing, and bacterial artificial chromosome (BAC) library and end-sequencing. The ice samples were from the Dry Valley region. Age dating by $^{40}Ar/^{39}Ar$ analysis on the volcanic ashes deposited in situ indicated the ice samples are minimum 100,000-300,000 yr (sample DLE) and 8 million years (sample EME) old. Further assay proved the ice survived freeze-thaw cycles or other re-working processes. EME, which was from a small lobe of the basal Taylor glacier, is the oldest known ice on Earth. Microorganisms, preserved frozen in glacier ice and isolated from the rest of the world over a geological time scale, can provide valuable data or insight for the diversity, distribution, survival strategy, and evolutionary relationships to the extant relatives. From the 16S gene cloning study, we detected no PCR amplicons with Archaea-specific primers, however we found many phylotypes belonging to Bacteria divisions, such as Actinobacteria, Acidobacteria, Proteobacteria $({\alpha},\;{\beta},\;and\;{\gamma})$, Firmicutes, and Cytophaga-Flavobacterium-Bacteroid$. BAC cloning and sequencing revealed protein codings highly identical to phenylacetic acid degradation protein paaA, chromosome segregation ATPases, or cold shock protein B of present day bacteria. Throughput sequencing of the BAC clones is underway. Viable and culturable cells were recovered from the DLE sample, and characterized by their 16S rDNA sequences. Further investigation on the survivorship and functional genes from the past should help unveil the evolution of life on Earth, or elsewhere, if any.

• 유통과학연구
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• 제10권7호
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• pp.23-31
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• 2012

The purpose of this study is to investigate existing world economic science theories and concepts of sustainable development as well as create original system of criteria and indicators to assess potential and conditions for sustainable development from a regional perspective and based on the above justify proposals for public authorities to improve methods of economic regulation for regional development. To achieve the goal evolution process of existing theories and concepts of sustainable development and "green growth" have been studied in terms of its adaptation to the spatial development of Kazakhstan, comparative dynamics of natural resources consumption in the Asia-Pacific region and Kazakhstan were investigated as well. Methodology. World best theory and practice methods for assessment of the level of sustainable development of the country and some of its territories were also studied. We selected the best system of criteria and indicators for assessment of economic, social and environmental sustainability of regional systems. Methods offered in this article are based on traditional and new factors of economic development and conditions for operation of regional systems. Indicators are chosen with a glance to basic goals for future development of regions in Kazakhstan. It is recommended to use two levels of methodology offered by author, namely national and regional, and at the local level later (districts, municipalities, cities). The results. Method offered by the author has been tested based on materials and statistics of regions in Kazakhstan. Suitability and usability of the proposed system of criteria and indicators for measuring of economic, social and environmental sustainability of regional systems was proved. Based on this analysis it was found out that there are regions in Kazakhstan that differ from each other by most of key indicators of sustainable regional development and this tendency is increasing. Conclusions and recommendations. As a result of this analysis, the authors have substantiated a number of proposals on methods of analysis to be used, improvement of methods of regional development, implementation of institutional reforms, as well as improvement of regional statistics. This article provides recommendations that can be successfully used in the management practices by public authorities to implement a new regional strategy focused on sustainable development in future.

• 품질경영학회지
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• 제45권4호
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• pp.629-648
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• 2017

Purpose: The world faces a great turning point fundamentally rebuilding the future, and human lives, by embracing the 4th industrial revolution era. This paper aims to seek new and various business models in the 4th industrial revolution era, and to examine the evolution of quality management in the changing of the industrial ecosystem. Methods: This paper examines the various strategies of approaching the 4th industrial revolution in Germany, the USA, Japan, China, and Korea. This paper also draws detailed items by classifying the six major items of Malcolm Baldridge into large, medium, and small scale classifications, researches items from the technical perspective by applied fields, and the four major factor perspectives of quality management, as well as analyzes the relevant items in a multidimensional method. After a questionnaire survey targeting 200 quality experts was conducted, the important quality management factors were selected by applying the Analytic Hierarchy Process (AHP) method. Results: The importance of the general criteria was analyzed in the order of customers, MAKM (measurement, analysis, and knowledge management), workforce, strategy, operations, and leadership. As for the importance analysis results of the secondary subcriteria, the following items are highly analyzed: senior leadership, searching business model's innovation opportunity, customer satisfaction improvement, big data utilization, systematic management of workforce, and, planning and design quality. Conclusion: In the era of the Internet of everything, when complexity increases, this study presented a quality management direction suitable for new business methods challenging existing orders by drawing on quality management priorities.

• 에너지공학
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• 제28권4호
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• pp.103-110
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• 2019

국내에서 개발 중인 차세대 혁신형 안전경수로인 iPOWER는 피동용융노심냉각계통의 도입을 통해 중대사고시 노심용융물을 원자로 하부에서 장기간 냉각하고 안정화시키고자 한다. 아직 피동용융노심냉각계통의 최종 설계개념이 확정되기 전이나, 원자로용기 외벽냉각을 통한 노심용융물의 노내 억류 역시 주요 중대사고 대처 전략의 하나로 검토되고 있다. 본 연구에서는 국내에서 개발된 열수력 계통해석코드인 MARS-KS를 이용하여 원자로용기와 단열체 사이에서 형성되는 2상 자연순환 유동을 모의하였다. 냉각수의 유로를 일차원으로 모델링하고, 노심용융물의 열부하에 따른 경계조건을 정의하여 자연순환 유량을 계산하였다. 또한 냉각수의 온도 및 수위, 원자로용기 하반구 주변 기포율 및 외벽에서의 열전달모드 등 주요 열수력 변수의 과도거동을 평가하였다.

• 정보과학회 컴퓨팅의 실제 논문지
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• 제21권1호
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• pp.46-51
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• 2015

폭발적으로 증가하는 데이터와 급변하는 기술적 발전은 과거와 현재를 넘어 미래를 예견하고 대응할 수 있는 새로운 분석 패러다임을 요구한다. 지시적 분석은 목표를 설정하고 이를 달성하기 전략을 수립함으로써 분석 결과의 제시에 그치는 게 아니라 사용자에게 목표 달성을 위한 구체적 행동과 그 결과를 요구한다는 점에서 기존의 기술적 분석, 예측적 분석과 근본적인 차이점을 보여준다. 그렇지만, 아직까지 구체적인 구현 방안이 널리 연구되고 있지 않고 있다. 본 연구에서는 연구 역량 강화를 목적으로 개발되고 있는 InSciTe Advisory 사례를 통해 고려할 사항과 어떤 개발 요소들이 필요한 지를 살펴봄으로써 해당 연구 분야의 기반을 제시하고자 한다. InSciTe Advisory 시스템은 5W1H 방법론을 중심으로 연구자가 롤 모델 그룹에 도달하기 위한 전략을 수립할 수 있음을 보이며, 평가 모델을 통해 Elsevier SciVal과 비교하여 126.5%라는 비교 우위적 평가 결과를 얻었다.