• Proceedings of the Korea Association of Information Systems Conference
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• 2005.05a
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• pp.273-280
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• 2005

프로덕트 라인은 다양하게 빠르게 변화하는 시장의 요구사항과 특정 도메인에 속하는 응용들 간의 재사용 가능한 아키텍처 및 컴포넌트의 구성으로부터 연관된 시스템 구축 시 생산성과 품질의 향상을 제공함으로써 현재 많은 관심의 초점이 되고 있다. 이들 프로덕트 라인에서는 프로덕트들 사이의 공통성과 변화성에 초점을 두고 이들 분류 방법으로 휘처 모델링이라는 개념을 주로 사용하여 분석하고 있다. 또한 재사용 가능한 아키텍처는 많은 변화 계획들과 메커니즘을 포함하고 있다. 그러나 지금까지 이러한 변화들이 일어나는 상황을 이해하는 것과 특별한 상황에서도 가능하게 하는 옵션들을 기록하는 것은 명확히 이루어지지 못하였다. 따라서, 명확한 변화성의 표현과 아키텍처에서 변경되는 적절한 위치를 식별하는 것이 중요하다. 그러므로, 본 논문에서는 휘처 모델을 기반으로 한 아키텍처 상의 컴로넌트 변화성과 컴포넌트 간의 관련성에서의 변화성 표현방법을 기술하고. 제시한 이론을 기반으로 웹 학습 시스템을 개발하고자 한다.

• Proceedings of the IEEK Conference
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• 2002.07b
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• pp.743-746
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• 2002

This paper proposes the design of a current-mode CCII-based 2$\^$nd/ _order bandpass biquad filter from a grounded series capacitor and frequency-dependent negative conductor ( C-D ) immittance function simulator using the macro model of a commercial available CCII+, AD844, from Analog Devices, Inc. The results are compared with the other results those are designed using ideal model of CCII-. The gain and phase deviations; due to the effects of passive sensitivity, active sensitivity, gain sensitivity and component variability; are considered using Monte-Carlo analysis of PSpice program.

• The Journal of the Korean dental association
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• v.9 no.1
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• pp.43-48
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• 1971

The purpose of this study is to evaluate the influence of genetics of the dimensions of dental arches in twins. Thirty-four pairs of Korean twins, of which twenty-three were monozygotic and eleven dizygotic, participated in the study. The twins ranged in age from 6 years to 12 years with mixed dentition. The results were as follows: 1) No significant differences were observed between male and female in mean interpair diffenences of monozygotic twins. 2) Mean interpair differences of monozygotic twins were lesser than these of dizygotic twins. 3) Highly significiant zygotic differences were observed in the mean interpair differences of the width of upper and lower dental arch. This suggest that there is a significant component of hereditary variability.

• International Journal of Contents
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• v.8 no.4
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• pp.95-102
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• 2012

In this paper, we present a technique to extract the title areas from book cover images. A typical book cover image may contain text, pictures, diagrams as well as complex and irregular background. In addition, the high variability of character features such as thickness, font, position, background and tilt of the text also makes the text extraction task more complicated. Therefore, we propose a two steps efficient method that uses Histogram of Oriented Gradients and color information to find the title areas. Firstly, text localization is carried out to find the title candidates. Finally, refinement process is performed to find the sufficient components of title areas. To obtain the best result, we also use other constraints about the size, ratio between the length and width of the title. We achieve encouraging results of extracted title regions from book cover images which prove the advantages and efficiency of the proposed method.

• Korean Journal of Construction Engineering and Management
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• v.6 no.1 s.23
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• pp.73-79
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• 2005

This paper, introduces a Stochastic Project Scheduling Simulation system (SPSS III) developed by the author to predict a project completion probability in a certain time. The system integrates deterministic CPM, probabilistic PERT, and stochastic Discrete Event Simulation (DES) scheduling methods into one system. It implements automated statistical analysis methods for computing the minimum number of simulation runs, the significance of the difference between independent simulations, and the confidence interval for the mean project duration as well as sensitivity analysis method in What-if analyzer component. The SPSS 111 gives the several benefits to researchers in that it (1) complements PERT and Monte Carlo simulation by using stochastic activity durations via a web based JAVA simulation over the Internet, (2) provides a way to model a project network having different probability distribution functions, (3) implements statistical analyses method which enable to produce a reliable prediction of the probability of completing a project in a specified time, and (4) allows researchers to compare the outcome of CPM, PERT and DES under different variability or skewness in the activity duration data.

• PNF and Movement
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• v.2 no.1
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• pp.35-47
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• 2004

Purpose : The purpose of this article was to review the literature on contractile properties of skeletal muscle with reference to its molecular and functional diversity. Method : This review outlines scientific findings regarding different contractile properties in skeletal muscle fibers, and discusses their involvement in functional diversity. Result & Conclusions: Muscle fibers possess distinct mechanical and energetic properties. Myosis, one of the primary contractile muscle proteins, displays structural, functional variability and plays the role of the molecular motor of muscle contraction. Muscle satellite cells are normally mitotically quiescent, but initiate proliferation and give rise to daughter myogenic precursor cells as required for the postnatal growth and regeneration of adult muscle. Passive extensibility is an important component of total muscle function because it allows for the maximal length of skeletal muscles. Proprioceptive neuromuscular facilitation(PNF) stretching can help to restore or improve flexibility and coordination, thereby improving overall muscle function.

• Journal of Life Science
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• v.16 no.4
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• pp.672-675
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• 2006

In order to determine the morphological variations of the Japanese swimming crab, Charybdis japonica, we conducted morphological analysis of five populations that are relatively abundant in Korea and Japan. Abdominal sternite for individuals of the Tean population showed significantly short when compared to those of other populations. Principal component analysis demonstrated that morphological differentiation was due to differences (A/Q, B/M, D/P, F/O, J/K), and effectively discriminated each others. The first two components accounted for 40.9% and 60.7% of the variation, respectively. The dendrogram showed three distinct groups, Tokyo population, Taean population, and the other populations.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10b
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• pp.280-282
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• 2003

가변성은 컴포넌트의 재사용성을 향상시킬 수 있는 요소이다. 어떤 도메인의 여러 패밀리에서 사용될 수 있는 컴포넌트를 개발하기 위해 컴포넌트 가변성이 강조되고 있다. 개발된 컴포넌트가 다양한 유형의 가변성을 지원할수록 도메인 내에서 재사용성이 높아진다. 하지만, 컴포넌트가 너무 많은 가변성을 지원하도록 개발되면, 컴포넌트의 크기가 거대해지며, 개발 기간과 개발 비용이 증가하게 된다. 따라서 해당 도메인에 맞는 적절한 가변성을 지원하는 컴포넌트를 개발해야 한다. .NET의 C＃ 언어는 컴포넌트 개발 언어로 산업계에서 각광 받고 있다. 본 논문에서는 C＃에서 제공하는 기본적인 장치를 활용해 속성 가변성을 지원하는 컴포넌트를 구현 기법을 제시한다. 클래스를 동적으로 생성할 수 있는 빌더(Builder) 클래스를 통해 속성 가변성을 지원한다. 그래서 여러 패밀리 멤버에서 재사용 할 수 있는 고품질의 컴포넌트 개발 방법을 제시한다.

• Current Research on Agriculture and Life Sciences
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• v.30 no.2
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• pp.97-104
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• 2012

Over the last century, drainage systems have become an integral component of agriculture. Climate observations and experiments using General circulation models suggest an intensification of the hydrologic cycle due to climate change. This study presents hydrologic simulations assessing the potential impact of climate change on subsurface drainage in Daegu, Republic of Korea. Historical and Long Ashton Research Station weather generator perturbed future climate data from 15 general circulation models for a field in Daegu were ran into a water management simulation model, DRAINMOD. The trends and variability in rainfall and Soil Excess Water ($SEW_{30}$) were assessed from 1960 to 2100. Rainfall amount and intensity were predicted to increase in the future. The predicted annual subsurface drainage flow varied from -35 to 40 % of the baseline value while the $SEW_{30}$ varied from -50 to 100%. The expected increases in subsurface drainage outflow require that more attention be given to soil and water conservation practices.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.413-413
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• 2023

Wetlands are a critical component of the global carbon cycle and are essential in mitigating climate change. Accurately quantifying wetland carbon emissions is crucial for understanding and predicting the impact of wetlands on the global carbon budget. The uncertainty quantifying carbon in wetlands may comes from the ecosystem's hydrological, biochemical, and microbiological variability. The Community Land Model is a sophisticated and flexible land surface model that offers several configuration options such as energy and water fluxes, vegetation dynamics, and biogeochemical cycling, necessitating careful consideration for the alternative configurations before model implementation to develop a practical model framework. We conducted a systematic literature review, analyzing the alternatives, focusing on the carbon stock pools configurations and the parameters with significant sensitivity for carbon quantification in wetlands. In addition, we evaluated the feasibility and availability of in situ observation data necessary for validating the different alternatives. This analysis identified the most suitable option for our study site, the Binbong Wetland, in Korea.