• International Journal of Naval Architecture and Ocean Engineering
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• 제8권6호
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• pp.615-630
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• 2016

Complex stress distributions often exist in ocean engineering structures. This stress influences structural vibrations. Finite Element Methods exhibit some shortcomings for solving non-uniform stress problems, such as an unclear physical interpretation, complicated operation, and large number of computations. Analytical methods research considers mainly uniform stress problems, and often, their methods cannot be applied in practical marine structures with non-uniform stress. In this paper, an analytical method is proposed to solve the vibration of plates with general stress distributions. Non-uniform stress is expressed as a special series, and the stress influence is inserted into a vibration equation that is solved through decoupling to obtain an analytical solution. This method has been verified using numerical examples and can be used in arbitrary stress distribution cases. This method requires fewer computations and it provides a clearer physical interpretation, so it has advantages in some qualitative research.

• 가정과삶의질연구
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• 제22권5호
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• pp.29-45
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• 2004

This ethnographic case-study explores the interpretation and behavior in job considering among full-time housewives. The participants of this study are eleven middle class full-time housewives in their thirties and forties. In-depth interviews based on an unstructured Questionnaire were conducted for this study. Findings are as follows: Six full-time housewives tend to think their full-time housewife-lives more convenient, something unable to substitute and more profitable compared to the counter partner's lives. But they are classified into two groups according to the satisfaction for full-time housewife life. One group has found out more positive meaning in their life but the other group has not yet and they are doubtful about real life and other opportunity. In Contrast, other five full-time housewives tend to interpret employment as a more productive source to secure family resource for their children's education and repay the loan used to buy larger apartment. And the job is considered to confirm her own individuality and the feeling for the social entity as a competent social entity. But two of them who have never been employed do not try to get a job as a new identity alternative. And the various elements like household income, job experience, health, children's age and husband's attitude to his wife's employment etc. are defined to influence the interpretation and the job considering behavior among full-time housewives.

• 한국학교수학회논문집
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• 제21권2호
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• pp.113-139
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• 2018

많은 사람들이 교수에서 교사의 지식이 중요다고 동의하고, 이에 대해 많은 연구들이 정량적인 접근 방식을 사용하여 잘 가르치기 위해 교사가 갖추어야 할 지식의 요소와 특징을 규명하려고 시도하였다. 이러한 기존의 연구들과는 달리 본 논문은 기하 영역에서 예비 교사의 지식을 정성적인 방법으로 Shulman-Fischbein 개념틀을 활용하여 해석하는 방법을 제안한다. 7명의 여 예비교사들이 본 연구에 자원하여 참여하였고, 각 예비교사는 지필 형식으로 된 일련의 과제를 수행하였다. 수집된 예비교사의 지식은 수학적 알고리즘적 SMK, 형식적 SMK, 직관적 SMK, 알고리즘적 PCK, 형식적 PCK, 직관적 PCK로 분석되었다. 해결결과 예비 교사들은 강한 SMK를 갖고 있고, 그들의 뿌리깊게 자리잡은 SMK는 변하지 않으며, 그들의 SMK와 PCK는 상당한 관련이 있고, 그들은 학생에 대한 지식과 관련하여 적절한 PCK를 갖고 있지만, 교수학적 전략을 제시함에 있어 직관적 PCK에 상대적으로 덜 고려하는 경향을 보였다. Shulman-Fischbein 개념틀을 활용하여 분석해 드러난 예비교사들의 지식은 향후 교사 양성 프로그램을 계획하는데 도움을 줄 수 있을 것이다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제26권6호
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• pp.1-17
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• 2021

Self-potential (SP) surveys measure naturally occurring differences in electrical potential in the absence of artificial sources and have been applied to various fields since the first application in mineral explorations. Among various causes of SP occurrences, streaming potential is generated by the flow of groundwater, and makes SP surveys suitable for the exploration of groundwater table fluctuation, fractures, sinkholes and landslide occurrences. Recently, there has been many studies that applied SP surveys to monitor water leakage through dikes and embankments. In this review paper, we first review the characteristics and theoretical backgrounds of streaming potential in saturated or unsaturated porous media to introduce it in the embankment among various application field. After the review of the background theory, we review the past cases of field SP surveys on dikes and embankments and also the characteristics of field streaming potential data in the surveys. Further, by analyzing past studies of qualitative as well as quantitative interpretation of SP survey data, we show the possibility of quantitative interpretation of streaming potential data obtained on dikes and embankments. Consequently, it is hope that this review paper helps researches on SP surveys on dikes and embankments, and provides basis for interpretation methods of the SP data to identify leaked area and further leakage rate (or permeability).

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 1999년도 추계 학술발표회 논문집
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• pp.119-124
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• 1999

A selection methodology of liquid levelmeters, especially, level sensors in non-nuclear category, to be installed in nuclear energy facilities is developed using linguistic fuzzy approaches such as fully-linguistic and semi-linguistic methods. Depending on defuzzification techniques, the linguistic fuzzy methodology leads to either linguistic (exactly, fully-linguistic) or cardinal (i.e., semi-linguistic) evaluation. For the linguistic method, for each alternative, fuzzy preference index is converted to linguistic utility value by means of a similarity measure determining the degree of similarity between fuzzy index and linguistic ratings. For the cardinal method, the index is translated to cardinal overall utility value. According to these values, alternatives of interest are linguistically or numerically evaluated and a suitable alternative can be selected. Under given selection criteria, the suitable selections out of some liquid levelmeters for nuclear facilities are dealt with using the linguistic fuzzy methodology proposed. Then, linguistic fuzzy evaluation results are compared with qualitative result available in the literature. It is found that as to a suitable option the linguistic fuzzy selection is in agreement with the qualitative selection. Additionally, the comparative study shows that the fully-linguistic method using adequate scale system facilitates linguistic interpretation regarding evaluation results.

• 데이타베이스연구회지:데이타베이스연구
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• 제34권3호
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• pp.159-169
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• 2018

연속형 변수의 이산화(Discretization)는 양적 변수(Quantitative variable)를 질적 변수(Qualitative variable)로 변형시켜 데이터 마이닝(Data mining) 기법 등 다양한 알고리즘의 성능을 향상시키는데 사용 목적이 있다. 데이터에 적절한 이산화 기법을 사용한다면 분류 알고리즘에 대해 더 좋은 성능뿐 아니라 간결한 결과 해석, 속도 향상까지 기대할 수 있다. 현재까지 다양한 이산화 기법들이 연구되었으며, 현재도 이산화와 관련한 연구에 수요가 많다. 본 논문은 데이터의 클래스에 대한 연속형 변수 값의 분포를 고려하여, Wasserstein 거리를 이용해 분할점을 자동 설정하는 이산화 기법을 제안한다. 본 논문에서 제안하는 기법과 우수함이 입증된 기존의 이산화 기법에 대해 성능비교를 통해 제안 기법의 우수성을 보인다.

• 산경연구논집
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• 제12권6호
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• pp.47-55
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• 2021

Purpose: Organizational crime is an offense committed by an individual or an official in a corporate entity for organizational gain. This study aims to explore the literature on challenges facing digital forensics and further discuss possible solutions to such challenges as far as the protection of corporate crime is concerned. Research design, data and methodology: Qualitative textual methodology matches the interpretative approach since it is a quality method meant to consider the inductivity of strategies. Also, a qualitative approach is vital because it is distinct from the techniques used in optimistic paradigms linked to science laws. Results: For achieving justice through the investigation of digital forensic, there is a need to eradicate corporate crimes. This study suggests several solutions to reduce corporate crime such as 'Solving a problem to Anti-forensic Techniques', 'Cloud computing technique', and 'Legal Framework' etc. Conclusion: As corporate crime increases in rate, the data collected by digital forensics increases. The challenge of analyzing chunks of data requires digital forensic experts, who need tools to analyze them. Research findings shows that a change of the operating system and digital evidence interpretation is becoming a challenge as the new computer application software is not compatible with older software's structure.

• 한국정보시스템학회지:정보시스템연구
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• 제32권1호
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• pp.85-108
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• 2023

Purpose The purpose of this study is to identify the role of digital shadow work(DSW) in the psychological mechanism that controls using and purchasing digital device accessories. More specifically, it is to reveal how the digital device user's perception of DSW is formed and how the formed DSW affects purchase and what results it will bring. Design/methodology/approach Ground theory method(GTM), one of qualitative appoaches, is adopted as research methodology. By interviewing total twenty five users, the data are analyzed by open coding amd axis coding. Two core codes are selected by selective coding and interpreted by DSW theory. Findings We find concern for potential DSW and generation of new DSW. Concern for potential DSW lead to the purchase of accessorie which would be supposed to reduce potential DSW. During purchasing accessories, quest type DSW, which provices flow experience and expertise, could be genterated. This means that there would be dynamics of DSW in the purchase process of digital device accessories.

• Journal of Forest and Environmental Science
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• 제36권1호
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• pp.47-54
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• 2020

A "Scenic Site" is an official heritage category legally defined as a "scenic site of outstanding artistic value with excellent scenic views." However, the subjective interpretation of the term causes several problems. This study suggested a systematic, organized process of designating a listed area as a scenic site after careful and detailed quantitative and qualitative analysis. Indicators were identified for each of the two analyses, and then scored and weighted. Quantitative indicators were distributed within 5 points for each indicator. Water, which is a natural indicator, based on distance from river boundaries. Forest landscapes were assigned in consideration of forest physiognomy and age class. Land use was allocated in consideration of land cover type and, in case of development site, '-' score was assigned. Cultural heritage conservation area, which is historical and cultural indicator, was distributed by distance within a maximum of 500 meters. Visibility, an indicator of landscape value, was assigned according to the frequency of visibility. The weight of each indicator was calculated by considering the value of each item. The weight of distribution of cultural resources is relatively high, while other items were set the same. In case of land use, however, '-' score was given according to the grade. Qualitative indicators, on the other hand, were considered terrain, landscape zone, ownership, intellectual boundary, and land category. The applicability of the proposed process and method was examined by applying the existing methods and criteria used for designating scenic spots. Opinions of subject-matter experts were incorporated in the identification of the indicators and in the result review stage. In the future, it is necessary to apply this method while designating scenic sites so as to establish an objective, scientific designation process.

• 대한화학회지
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• 제8권2호
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• pp.47-56
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• 1964

展開한 페이퍼크로마토그램을 韓國 Triga-Mark-Ⅱ 硏究用 原子爐의 뉴마딕튜부施設(中性子線束; 1.5{\times}$10^{12}n/cm^2$, sec)을 利用하여 照射하여 본 結果 크로마토그램上에 展開된 스폿트(spot)를 定性的으로 確認할 수 있었다. 有機하로겐 化合物(크로로酸, 크로로에스테르, 沃化物, 及 弗化物)에 있어서 一般發色法으로서는 明確한 着色스폿트(spot)를 나타내지 못한 것에 있어서도, 이 方法으로서 展開된 스폿트를 明確히 區別할 수 있었다. 濾紙成分의 放射化에 依한 誤差를 減少시키기 爲하여 濾紙두께 補正 及 放射化度 補正을 硏究한 結果, 濾紙두께 補正 及 放射能崩壞 補正法을 究明하였으며, 이 方法으로 스폿트를 放射化하여 定性分析하는데 좋은 結果를 얻을 수 있었다. 有機하로겐化合物의 分析 及 確認에 있어서의 이 方法의 效用性에 關하여 論議하였다. 濾紙相으로는 正常相 及 逆相을 함께 使用하였다.