• The Journal of Natural Sciences
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• v.9 no.1
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• pp.153-168
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• 1997

The purpose of this study was to investigate the formative aesthetic of head accessory design in korean women. Coming to Chosen, women from the court ir the nobility were Jukui, Wonsam, Whalot, Dangui and so on and as for the hair-form in this era, there were a long trees of hair for single and Unzonmeri(By making a tree with hair and raised up roundly) and Jjokmeri(Doing one's hair up in a chignon on the back of one's head) for married, as for a wig for ceremony they used Daeshu(As a same with today's wig added various head accessory design), Kunmeri(Putting a big hair made with a tree of Dukuji on Ayemeri) and Ayemeri(A big hair made with Darae on the head) and as for an head accessory design, there were Biye, Ddelgam and Chupji, which hadn't regularly developed untill the era Chosun. As is known, coming to the era of Chosun, the widely and generally used Biye and Duykokii fitted well to the most usual Jjokmeri.

• Communications for Statistical Applications and Methods
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• v.8 no.3
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• pp.739-751
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• 2001

In this paper, a sample design is studied for 2000 forestry management survey of five types forestry , tree felling, gathering of pine mushroom, growing of nut trees, growing of wild flowers, and lumbering industry. We introduce population stratification and a modified stratified cut-off sampling which deal with determination of sample size, sample allocation, and estimation of total and variance of estimator. Substitution of sample units and imputation of nonresponse units are discussed for reducing the nonsampling errors.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.26 no.6B
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• pp.727-735
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• 2001

본 논문은 8-VSB Advanced Digital TV용으로 사용할 수 있도록 ATSC(Advanced Television Standard Committee)의 규약을 만족시키도록 구현한 Reed Solomon 디코더에 대하여 기술한다. 구현된 RS Decoder는 공유된 Tree 구조의 Arithmetic 블록을 사용하여 종래의 기술보다 더 효율적인 연산기 구조를 제안하였으며 빠른 에러 탐지와 정정 시간으로 인한 FIFO의 사용갯수와 Latency Time을 크게 감소시킨 개선된 구조를 제안한다. 일반적으로 2N+A만큼의 Latency Time과 FIFO 개수를 N+A 만큼으로 감소시켰다. 이 RS 디코더는 Verilog HDL로 설계되었고 Synopsys Design Compiler에 의해 합성되었다.

• Journal of the military operations research society of Korea
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• v.27 no.2
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• pp.124-133
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• 2001

The purpose of this study is investigate the differences among parametric and nonparametric test statistics for the tree alternative hypothesis in the randomized block design. As the results, it was found that there was no large differences among parametric and nonparametric test statistics in power when the block sizes were larger, and Hollander's statistic had better power than other nonparametric test statistics. It is recommended that Hollander's test statistic is more useful method when we have no information about the distribution of population.

• Korean Journal of Computational Design and Engineering
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• v.10 no.4
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• pp.262-273
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• 2005

For CAD data users, few things are as frustrating as receiving CAD data that is unusable due to poor data quality. Users waste time trying to get better data, fixing the data, or even rebuilding the data from scratch from paper drawings or other sources. Most related works and commercial tools handle the boundary representation (B-Rep) shape of CAD models. However, we propose a design history?based approach for healing CAD model errors. Because the design history, which covers the features, the history tree, the parameterization data and constraints, reflects the design intent, CAD model errors can be healed by an interdependency analysis of the feature commands or of the parametric data of each feature command, and by the reconstruction of these feature commands through the rule-based reasoning of an expert system. Unlike other B Rep correction methods, our method automatically heals parametric feature models without translating them to a B-Rep shape, and it also preserves engineering information.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1989.10a
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• pp.126-132
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• 1989

• Journal of KIISE:Computer Systems and Theory
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• v.29 no.8
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• pp.484-492
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• 2002

We propose an efficient stream authentication scheme using tree authentication. To reduce the computation cost of the sender, we design the authentication tree whose height is very short. We appropriately distribute authentication information over packets so the receiver can verify data with high probability. Moreover, we provide mathematical analysis on the verification probability. For the proposed scheme and previous schemes, we measured the elapsed time for generating authentication information and the proposed scheme has equal to or slightly larger than that of GM's scheme, which has the lowest computation overhead. We performed simulations, which show that the verification probability of the proposed scheme is much higher than that of any other scheme.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.18 no.spc
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• pp.63-74
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• 2020

The operational safety assessment is an important part of a safety case for the deep geological repository of spent fuels. It consists of different stages such as the identification of initiating events, event tree analysis, fault tree analysis, and evaluation of exposure doses to the public and radiation workers. This study develops a probabilistic safety assessment method for the operational safety assessment and establishes an assessment framework. For the event and fault tree analyses, we propose the advanced information management system for probabilistic safety assessment (AIMS-PSA Manager). In addition, we propose the Radiological Safety Analysis Computer (RSAC) program to evaluate exposure doses to the public and radiation workers. Furthermore, we check the applicability of the assessment framework with respect to drop accidents of a spent fuel assembly arising out of crane failure, at the surface facility of the KRS⁺ (KAERI Reference disposal System for SNFs). The methods and tools established through this study can be used for the development of a safety case for the KRS⁺ system as well as for the design modification and the operational safety assessment of the KRS⁺ system.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.33 no.8B
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• pp.624-629
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• 2008

Many routing protocols have been proposed for sensor networks where energy awareness and reliability are essential design issues. This paper proposes an Energy-aware Tree Routing Protocol (ETRP) for Wireless Sensor Networks. The proposed scheme relates to reliable and energy efficient data routing by selecting a data transmission path in consideration of residual energy at each node to disperse energy consumption across the networks and reliably transmit the data through a detour path when there is link or node failure. Simulation results show that the proposed method outperformed traditional Tree Routing (TR) by 23.5% in network lifetime.

• Journal of the Korean Society of Safety
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• v.15 no.2
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• pp.126-135
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• 2000

Probabilistic Safety Assessment (PSA) is an engineering analysis method to identify possible contributors to the risk from a nuclear power plant and now it has become a standard tool in safety evaluation of nuclear power plants. PSA consists of three phases named as Level 1, 2 and 3. Level 2 PSA, mainly focused in this paper, uses a step-wise approach. At first, plant damage states (PDSs) are defined from the Level 1 PSA results and they are quantified. Containment event tree (CET) is then constructed considering the physico-chemical phenomena in the containment. The quantification of CET can be assisted by a decomposition event tree (DET). Finally, source terms are quantitatively characterized by the containment failure mode. As the main benefit of PSA is to provide insights into plant design, performance and environmental impacts, including the identification of the dominant risk contributors and the comparison of options for reducing risk, this technique is expected to be applied to the industrial safety area.