• 한국측량학회지
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• 제20권2호
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• pp.191-197
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• 2002

최근 컴퓨터 관련분야의 눈부신 발전과 더불어 고해상도 디지털 카메라의 개발은 수치사진측량분야에서도 보다 정확한 위치측정을 가능하게 하였으며, 이의 활용에 관심이 집중되고 있다. 본 연구는 사진실측을 통해 근대문화유산 건축물의 수치도면을 작성함에 있어서 수치영상을 이용한 영상선점 기법을 토대로 보다 손쉽게 3차원 위치측정이 가능한 알고리즘을 개발하고 시스템을 구축하여 기준점 측량작업 및 촬영조건 제약을 획기적으로 줄일 수 있었으며 보다 효율적으로 건축물의 수치도면화 및 3차원 모델을 구축할 수 있었다.

• 한국의류학회지
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• 제23권5호
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• pp.703-714
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• 1999

The purpose of the present study was to identify the effect of ritual dress on korean catholic priest's impression. The subject consisted of 415 undergraduated students. The experimental materials developed for this study were 3 type color photographs stimuli of catholic priest model and 7-point sementic differential scale composed of 49 bipolar adjectives representing personal traits. The data were analyzed by factor analysis. the major findings drawn from this study were as follows : Four factors emerged to account for the dimentional structure of the impression of each dress style. Four factors were titled as open-hearted mind symbolic meaning nature of priest potency. The open-hearted mind factor was the largest throughout the 3types ritual dress. Casula had a positive effect on open-hearted mind nature of prist and negative on symbolic meaning potency. Sutan had a positive effect on open-hearted mind potency nature of priest and negative on symbolic meaning. Black suit with roman collar had a positive effect on open-hearted mind symbolic meaning nature of prist and negative on potency, Therefore the ritual dress had significant effect on korean catholic priest' impressin of open-hearted mind symbolic meaning nature of prist activity and potency

• 한국방재학회:학술대회논문집
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• 한국방재학회 2008년도 정기총회 및 학술발표대회
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• pp.691-694
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• 2008

최근 하천의 유지유량을 결정함에 있어 어류의 서식환경을 고려하여 최적의 유량규모를 제시하는 연구결과가 국내 여러 연구자에 의해서 제시되고 있다. 본 연구에서는 하천에서의 어류서식처를 고려한 최적의 유량을 산정함에 있어 미국에서 제시된 유지유량증분 방법론(Instream Flow Incremental Methodology)에 근본을 두고 가중가용면적(Weighted Usable Area)-유량관계를 찾아 2차원 물리서식처 모의 모형인 River2D를 금강수계 주요지류에 적용하여 금강의 우점종인 피라미의 성장단계별 최적의 유량을 산정하고자 한다.

• 한국항공운항학회지
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• 제22권4호
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• pp.25-33
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• 2014

As global warming becoming an environmentally serious issue, more attention is drawn to fuel consumption which is the direct source of green house gas emission. The fuel consumption by aircraft operation is not an exception. Motivated by the societal and environmental context, this paper explains a method for estimation of aircraft fuel consumed during their flights as well as the computational process using real flight track data. Applying so-called 'Total Energy Model' along with aircraft specific parameters provided in EUROCONTROL's Base of Aircraft Data (BADA) to aircraft radar track data, we estimate fuel consumption of individual aircraft flown between Gimpo and Jeju airports. We then assess the estimation accuracy by comparing the estimated fuel consumption with the actual one collected from an airline. The computational results are quite encouraging in that the method is able to estimate the actual fuel consumption within ${\pm}6{\sim}11%$ of error margin. The limitations and possible enhancements of the method are also discussed.

• 한국정보처리학회논문지
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• 제4권11호
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• pp.2701-2710
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• 1997

재귀원형군은 마이크로 프로세스의 모델로서 활발하게 연구되고 있으며 특히 슈퍼컴퓨팅 분야에서 많은 관심을 불러 일으키고 있다. 본 논문에서는 재귀원형군에서 메시지의 경로 설정을 연구하는데 이는 네트워크의 성능 평가에 중요한 기준이 된다. 재귀원형군에서 출발 노드에서 목적 노드까지 m개의 패킷을 m개의 경로를 따라서 동시에 전송하고자 한다. 이 때 i번째의 패킷은 i번째의 경로를 따라서 전송된다. $(o{\leq}i{\leq}m-1)$. 모든 패킷들이 목적 노드에 신속하고 안전하게 도달하기 위해서 i번째의 경로는 disjoint해야 한다. 이들 경로들을 설계하기 위해서 Hamiltonian Circuit Latin Square(HCLS)를 재귀원형군에 적용시켜서 $O(n^2)$ 병렬 경로 알고리즘을 제안한다.

• 품질경영학회지
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• 제30권4호
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• pp.58-67
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• 2002

Since the inception of off-line quality control, it has drawn a particular attention from research community and it has been implemented in a wide variety of industries mainly due to its extensive applicability to numerous real situations. Emphasizing design issues rather than control issues related to manufacturing processes, off-line quality control has been recognized as a cost-effective approach to quality improvement. It mainly consists of three design stages: system design, parameter design, and tolerance design which are implemented in a sequential manner. Utilizing experimental designs and optimization techniques, off-line quality control is aimed at achieving product performance insensitive to external noises by reducing process variability. In spite of its conceptual soundness and practical significance, however, off-line quality control has also been criticized to a great extent due to its heuristic nature of investigation. In addition, it has also been pointed out that the process optimization procedures are inefficient. To enhance the current practice of off-line quality control, this study proposes an integrated optimization model by utilizing a well-established statistical tool, so called response surface methodology (RSM), and a tolerance - cost relationship.

• Bulletin of the Korean Chemical Society
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• 제12권2호
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• pp.143-148
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• 1991

In the unhydrated and hydrated states, conformational free energies of L-ascorbic acid anion (AAA) were computed with an empirical potential function and the hydration shell model (a program CONBIO). The conformational energy was minimized from possible starting conformations expressed with five torsion angles of the molecule. The conformational entropy of each low energy conformation in both states was computed using a harmonic approximation. As found in L-ascorbic acid (AA), intramolecular hydrogen bonds (HBs) are proved to be of significant importance in stabilizing the overall conformations of AAA in both states, and give the folded conformations, which are quite different from those in crystal. There are competitions between HBs and hydration around O3 atom of the lactone ring and hydroxyls of the acyclic side chain. Especially, the whole conformation of AAA is strongly dependent on the water-accessibility of O3 atom. Though there is a significant effect of the hydration on conformational surface, the lowest energy conformation of the unhydrated AAA is conserved. The different patterns of HBs and hydration result in the conformations of AAA in both states being different from those of AA. It can be drawn by several feasible conformations obtained in the hydrated state that there exists an ensemble of several conformations in aqueous solution.

• Smart Structures and Systems
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• 제24권6호
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• pp.693-707
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• 2019

This paper proposes an integrated safety assessment method that can take multiple sources data into consideration based on a data fusion approach. Data cleaning using the Kalman filter method (KF) was conducted first for monitoring data from each sensor. The inclination data from the four tilt sensors of the same monitoring section have been associated to synchronize in time. Secondly, the finite element method (FEM) model was established to physically correlate the external forces with various structural responses of the shield tunnel, including the measured inclination. Response surface method (RSM) was adopted to express the relationship between external forces and the structural responses. Then, the external forces were updated based on the in situ monitoring data from tilt sensors using the extended Kalman filter method (EKF). Finally, mechanics parameters of the tunnel lining were estimated based on the updated data to make an integrated safety assessment. An application example of the proposed method was presented for an urban tunnel during a nearby deep excavation with multiple source monitoring plans. The change of tunnel convergence, bolt stress and segment internal forces can also be calculated based on the real time deformation monitoring of the shield tunnel. The proposed method was verified by predicting the data using the other three sensors in the same section. The correlation among different monitoring data has been discussed before the conclusion was drawn.

• 대한조선학회논문집
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• 제37권4호
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• pp.31-39
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• 2000

본 연구에서는 원형주상체주위 층난류유동에 대한 수치해석을 수행하였다. 레이놀즈수 $10^4$에서 $10^6$까지 수치해석하였는데, 레이놀즈수 $4{\times}10^5$ 부근은 항력값의 급격한 변화가 발생하는 영역이다. 수치해석결과를 실험값과 비교하였는데, 비교적 일치함을 알 수 있었다. 물체법선방향으로 격자의 최소화와 물체표면방향으로의 격자수를 증가시키면, 난류모델링을 사용하지 않아도 좋은 결과를 얻을 수 있었다. 앞으로 압력구배가 없는 2차원 평판 및 3차원 물체에 적용시에도 같은 결과를 얻을 수 있는가에 대한 연구가 지속되어야 할 것으로 생각된다.

• The Journal of Asian Finance, Economics and Business
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• 제8권11호
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• pp.87-96
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• 2021

Data-driven markets depend on access to data as a resource for products and services. Since the quality of information that can be drawn from data increases with the available amount and quality of the data, businesses involved in the data economy have a great interest in accessing data from other market players and sharing data with other stakeholders. Despite the growing need for access to data and evidence of the economic and social benefits, data access and sharing remains below its potential. Individuals, businesses, and governments often face barriers to data access, which may be compounded by the reluctance to share, including within and across sectors. To address these challenges, this paper focuses on finding possible solutions for a better data-sharing economy. This paper 1) Discusses opportunities and challenges of open data and the data-sharing economy, limitations of private sector data, and issues with open government data. 2) Introduces open government data initiatives and open governance networks initiatives. 3) Suggests possible solutions, including the governance and management, the legal and policy frameworks, and the technical standards for open data with proposing an open data governance model for the data-sharing economy.