• ETRI Journal
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• 제6권3호
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• pp.3-8
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• 1984

본고는 복수의 목적을 지니고 있는 통신기기의 투자에 관한 의사결정 모형을 다루고 있다.주요 분석기법으로서는 선형계획법의 일종인 목적계획법을 이용하였으며 사례로서는 1980년의 자료를 기초로 하여 1981년에 있어서 자동식교환기의 지역별 배분투자 문제를 다루어 보았다. 또한 컴퓨터를 통한 모형의 분석결과 적용 가능성을 확인하였으며 1981년도의 지역별 투자비율과 상당히 유사함을 발견하였다. 본 연구에서 제시하는 모형은 비단 자동식교환기 뿐만 아니라 통신기기 전반의 투자문제, 나아가서는 목적이 다수인 의사결정 문제에 광범위하게 응용될 수 있을 것이다.

• 한국자동차공학회논문집
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• 제11권2호
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• pp.140-147
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• 2003

Full scale durability test in the laboratory is an essential of any fatigue life evaluation of components or structures of the automotive vehicle. Component testing is particularly important in today's highly competitive industries where the design to reduce weight and production costs must be balanced with the necessity to avoid expensive service failure. Generally, hydraulic road simulator is used to carry out the fatigue test and the vibration test. In this paper, the link unit which is able to realize the 3 element forces such as vertical force, lateral force, and longitudinal force that are applied to the road simulator is designed. Also, the designed link is verified with kinematics and inverse-kinematics. From this results, the designed factor satisfied the maximum stroke so that it satisfied the requirements for 3-axial road simulator.

• 과학기술정책
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• 제1권7호통권7호
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• pp.12-17
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• 1991

2차 세계대전후 선진국의 경제 성장은 소비주의와 이를 뒷받침하는 Ford식 대량생산에 의한 것이었다. 그러나 오일 쇼크 등 경제 여건의 변화는 지식 집약적 고부가가치 제품의 경쟁적 생산으로의 전환을 가져왔으며, 이를 위해 다품종 소량생산 체제가 불가피해졌고, 일본은 이에 잘 적응한 나라이다. 가장 중요한 것은 기업간, 기업내의 기술 연계(TL)인바, 기술이전, 품질향상, 시장 확대 등이 TL의 성패에 달렸다고 할 수 있다. 어떤 경우에도 인력계발은 핵심적인 요소인바,CAD/CAM,CIM의 도입에도 인간관계와 인력양성이 중요하다. TL을 성공적으로 이룩해 낸 일본의 실례는 산업 경쟁력 제고와 고부가 가치 제품 생산으로 도약을 필요로 하는 한국의 과학기술, 산업 발전에 여러가지 시사하는 바가 크리라고 생각한다.

• Bulletin of the Korean Chemical Society
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• 제18권9호
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• pp.1002-1006
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• 1997

1H NMR spectra of D2O solutions containing 2,2-dimethylaziridine (1) or 2-methylaziridine (2) and [SiW11COⅡO39]6- (SiW11Co) or [SiW11NiⅡO39]6- (SiW11Ni) exhibit separate signals for the free ligand and the complex, indicating that the ligand exchange is slow on the NMR time scale. Identified are two linkage isomers with the methyl group of 2 at trans or cis position with respect to the metal. The isotropic shifts of 1 and 2 coordinated to SiW11Ni originate mainly from the contact shifts, and they agree reasonably with the relative values reported for similar ligands coordinated to bis(2,4-pentanedionato)nickel(Ⅱ). The isotropic shifts for the SiW11Co complexes were separated into contact and pseudocontact contributions. The pseudocontact shifts show that (χ∥-χ⊥) is positive, while that for the SiW11Co complexes of pyridine derivatives is negative. This result indicates that the ordering of dxy and dxz, dyz orbitals in SiW11Co complexes can be reversed by ligands.

• International Journal of Internet, Broadcasting and Communication
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• 제13권4호
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• pp.143-153
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• 2021

Recently, by applying the 4th industrial revolution technologies such as A.I., IoT, and big data to general residential infrastructure, various application services of residential-based are provided to residents through linkage and utilization between technologies. Accordingly, smart housing system is increasing as advanced living spaces that can improve the quality of life and convenience of residents. Such a smart housing is expected to be an item that can create new demands and markets in the construction industry since it provides a new paradigm that combines construction technology and IT by combining IT technology with existing construction industry. Based on this, it is expected that it will be possible to gradually develop large-scale markets such as smart buildings and smart cities. In this paper, therefore, we propose an artificial intelligence multiplex smart housing system as an intelligent platform that can autonomously manage and control the size of places and spaces, used for various purposes based on smart housing technology by using artificial intelligence systems.

• 방사성폐기물학회지
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• 제19권4호
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• pp.533-546
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• 2021

Large earthquakes with (M_W > ~ 6) result in ground shaking, surface ruptures, and permanent deformation with displacement. The earthquakes would damage important facilities and infrastructure such as large industrial establishments, nuclear power plants, and waste disposal sites. In particular, earthquake ruptures associated with large earthquakes can affect geological and engineered barriers such as deep geological repositories that are used for storing hazardous radioactive wastes. Earthquake-driven faults and surface ruptures exhibit various fault zone structural characteristics such as direction of earthquake propagation and rupture and asymmetric displacement patterns. Therefore, estimating the respect distances and hazardous areas has been challenging. We propose that considering multiple parameters, such as fault types, distribution, scale, activity, linkage patterns, damage zones, and respect distances, enable accurate identification of the sites for deep geological repositories and important facilities. This information would enable earthquake hazard assessment and lower earthquake-resulted hazards in potential earthquake-prone areas.

• 무역학회지
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• 제45권4호
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• pp.171-194
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• 2020

Although there is a lot of literature on the effectiveness of regional trade agreements(RTAs), it is usually analyzed only using trade-related theories and data. However, this paper has a differentiation in that we examine the linkage between international trade and financial markets through the stock markets reactions when the trade agreements related news arrived. Specifically, using an event study, we look into the Korea-US free trade agreement(KORUS FTA) which is the most commercially significant FTA in almost two decades for both the countries. Korean stock market generally responded more sensitively to FTA news than the US stock market, especially in 'Auto & Parts', 'Electrical Equipment' and 'Chemicals' industries. And the investors' perception toward the effect of KORUS FTA on Korean industries changed from negative to positive as negotiations proceed. Korea has a comparative advantage in the production of labor-intensive goods relative to US, but the economies of scale hypothesis does not hold.

• 국제초고층학회논문집
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• 제13권1호
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• pp.57-67
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• 2024

With the requirement of high quality and three-dimensional urban development, the public space areas city-center rail transit stations is expanded from the plots defined by the road network density to the plots defined by the three-dimensional public space density, covering the internal and external paths of the plots, which brings about the resilient pattern of plot utilization. This paper uses the isochronous three-dimensional influence realm model around the station areas to quantitatively analyze and compare the surrounding three-dimensional path density of public space, and initially proposes flexible use patterns of differently scaled plots under the multi-scale plots linkage, to effectively promote the overall accessibility of the station realm space.

• 한국경제지리학회지
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• 제10권4호
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• pp.414-426
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• 2007

본 논문의 목적은 제조업 집적경제의 공간외부성(spatial externalities) 시계열 변화를 추정하는 것이다. 이를 위해 광공업통계조사보고서를 사용하였으며, 분석의 공간적 범위는 도서 지역을 제외한 162개 시군구로 하였으며, 시간적 범위는 1991년부터 2005년까지로 하였다. 분석방법은 시공간을 고려한 공간경제계량모형인 공간 SUR를 이용하여 Cobb-Douglas 생산함수를 구축하였으며 이를 추정하기 위해 오차항의 종속성을 고려하여 3SLS를 이용하였다. 분석결과 전체 제조업 집적경제의 공간외부성(spatial externalities)은 시간에 따라 체감하는 것으로 분석되었으며 부가가치의 지니계수도 지속적으로 감소하는 것으로 분석되었다. 이는 그동안 동종 산업내 규모의 경제에 의한 집적효과가 공간외부성을 발생시켰으나 그 효과가 체감하기 때문이다. 이로부터 집적의 이익은 누리고 공간외부성을 확대할 수 있도록 이종 산업간에 연계강화를 통한 혁신환경을 조성할 수 있는 지역간 협력기구가 필요함을 의미한다.

• 원예과학기술지
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• 제32권4호
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• pp.535-543
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• 2014

Backcross breeding is the method most commonly used to introgress new traits into elite lines. Conventional backcross breeding requires at least 4-5 generations to recover the genomic background of the recurrent parent. Marker-assisted backcrossing (MABC) represents a new breeding approach that can substantially reduce breeding time and cost. For successful MABC, highly polymorphic markers with known positions in each chromosome are essential. Single nucleotide polymorphism (SNP) markers have many advantages over other marker systems for MABC due to their high abundance and amenability to genotyping automation. To facilitate MABC in hot pepper (Capsicum annuum), we utilized expressed sequence tags (ESTs) to develop SNP markers in this study. For SNP identification, we used Bukang $F_1$-hybrid pepper ESTs to prepare a reference sequence through de novo assembly. We performed large-scale transcriptome sequencing of eight accessions using the Illumina Genome Analyzer (IGA) IIx platform by Solexa, which generated small sequence fragments of about 90-100 bp. By aligning each contig to the reference sequence, 58,151 SNPs were identified. After filtering for polymorphism, segregation ratio, and lack of proximity to other SNPS or exon/intron boundaries, a total of 1,910 putative SNPs were chosen and positioned to a pepper linkage map. We further selected 412 SNPs evenly distributed on each chromosome and primers were designed for high throughput SNP assays and tested using a genetic diversity panel of 27 Capsicum accessions. The SNP markers clearly distinguished each accession. These results suggest that the SNP marker set developed in this study will be valuable for MABC, genetic mapping, and comparative genome analysis.