• Journal of the Korean BIBLIA Society for library and Information Science
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• v.17 no.1
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• pp.265-283
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• 2006

This study attempts to analyze factors that influence the level of career indecision for prospective librarians. To this end, an empirical study was conducted on the students from the department of Library & Information Science at universities located in Seoul, Kyunggi and Choong Chung Areas. Exogenous variables included personal, organizational and institutional characteristics. The result of analysis using the Structural Equation Model reveals that personal characteristics of students affect the level of career indecision whereas organizational and institutional characteristics do not have any statistical significance in career indecision. This suggests that, in order to raise the career decision level of prospective librarians. there is a need to develop programs to enhance occupational ego-identity and self-efficacy and to provide organizational and institutional supports, including better curriculum, improved practical ability and qualifications as librarians. This study also discusses its limits and areas for future research.

• Journal of the Korean Data and Information Science Society
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• v.22 no.6
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• pp.1017-1028
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• 2011

When it is not easy to decide the credit scoring for some loan applicants, credit evaluation is postponded and reserve to ask a specialist for further evaluation of undecided applicants. This undecided inference is one of problems that happen to most statistical models including the biostatistics and sportal statistics as well as credit evaluation area. In this work, the undecided inference is regarded as a missing data mechanism under the assumption of MNAR, and use the bivariate probit model which is one of sample selection models. Two undecided inference methods are proposed: one is to make use of characteristic variables to represent the state for decided applicants, and the other is that more accurate and additional informations are collected and apply these new variables. With an illustrated example, misclassification error rates for undecided and overall applicants are obtainded and compared according to various characteristic variables, undecided intervals, and thresholds. It is found that misclassification error rates could be reduced when the undecided interval is increased and more accurate information is put to model, since more accurate situation of decided applications are reflected in the bivariate probit model.

• Korean Journal of Culture and Social Issue
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• v.26 no.3
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• pp.145-166
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• 2020

The present study examines whether fear of negative evaluation, social comparison and self-criticism mediate the relationship between insecure attachment and career indecision. Participants are 401 unemployed people in their 20s who have never had a job. The major findings of this study are as follows. First, correlation analysis indicates that both anxious attachment and avoidant attachment are positively related to fear of negative evaluation and self-criticism. Also, anxious attachment is positively correlated with social comparison, whereas avoidant attachment is negatively correlated with it. Second, both insecure attachments have significant positive correlation with career indecision. Third, it shows the respective unique mechanisms by which each of the two insecure attachment forms are related to career indecision are distinctive: Specifically, The linkage between anxious attachment and career indecision is partially mediated by self-criticism and social comparison, whereas avoidant attachment is indirectly related to career indecision through a full mediation of self-criticism and social comparison. Implications and limitations of this study are discussed.

• Proceedings of the Korean Magnestics Society Conference
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• 1993.03a
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• pp.56-57
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• 1993

• Journal of Forest and Environmental Science
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• v.6 no.1
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• pp.1-7
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• 1989

The fine structures of the Primary and the secondary tissues in Pinus densiflora were examined by X-ray diffraction method. The results obtained are summarized as follows; 1. D-spacings of (200) and (004) Planes had little difference in both tissues. 2. The crystallinity index of the primary tissue as observed was 23%, while that of the secondary tissue was 35%. 3. The lateral crystallite size of both tissues had almost equal values. 4. The crystalline substances of the primary and the secondary tissues showed different patterns of orientation. The former had a random orientation, whereas the latter showed an orientation of 20 to 25'.

• The Korean Journal of Applied Statistics
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• v.34 no.2
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• pp.141-152
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• 2021

A new statistical model needs additional variables in order to re-evaluate the undecided inference. Then the MNAR assumption is required, since the probabilities for the positivity of the indeterminant and the determinant is calculated differently. In this study, since two statistical models have a hierarchical relationship, we determine the undecided inference under the MNAR assumption using the confidence interval of the difference between two AUCs. Among many methods of estimating the confidence interval of the AUC difference, it is found that four kinds of methods show excellent performance through simulations. And based on these methods, we propose a variable selection method that are useful for the undecided inference using logistic regression models.

• Journal of the Korean Wood Science and Technology
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• v.29 no.1
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• pp.60-67
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• 2001

The microscopic characteristics and cellulose structures of primary and secondary tissues in Pinus densiflora S. et Z. were examined. Cells of primary tissue in cross section showed an irregular arrangement and round shape. Fiber lengths were 200 to $250{\mu}m$ in primary tissue, and 1,500 to $1,600{\mu}m$ in secondary tissue. Cell diameters in primary tissue were larger than those in secondary tissue; 40 to $50{\mu}m$ in former and 10 to $20{\mu}m$ in latter. Crystallite width and d-spacing of (200) in both tissues did not show any significant differences. However, crystallinity indices by Segal's method showed significant differences as 23% in primary tissue and 35% in secondary tissue. In the orientation of cellulose microfibril, primary tissues had a random pattern, whereas, secondary tissues presented an oriented pattern with 20 to 30 degree. The cellulose crystalline of primary tissue was easily transformed into cellulose II by mercerization, but that of secondary tissue hardly transformed. It is considered that the difference of crystal transformation in both tissues could be caused by the difference of lignification.

• Proceedings of the IEEK Conference
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• 2002.06a
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• pp.65-68
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• 2002

본 논문은 HomePNA 2.0 시스템에서 채널에 의한 왜곡을 보상하기 위한 방안을 제시하는 것으로서 심벌률과 전송 방식에 따른 등화기를 Fast RLS 알고리즘인 FTF (Fast Transversal Filter) 알고리즘을 사용하여 구현하여 그 성능을 분석하며, 또한 헤더 부분의 미결정 심벌들을 이용하는 DFE (Decision Feedback Equalizer)형태로 등화기를 구성하고 이에 대한 성능을 분석하고자한다.

• Journal of the Korean Magnetics Society
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• v.4 no.2
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• pp.135-141
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• 1994

With the variation of Cr content and $N_2$ flow ratio, the soft magnetic properties, corrosion resistance and reactivity of the sputtered nanocrystalline FeZrCrN thin flims were investigated. In case of FeZrCrN thin films, a saturation magnetization was decreased with increasing $N_2$ flow ratio. In addition, good soft magnetic properties were obtained at the flow ratio of 3% $N_2$. The $Fe_{64.9}Zr_{8.8}Cr_{5.8}N_{20.5}$ nanocrystalline thin film after annealing at $550^{\circ}C$ exhibited the saturation magnetization of 12.5kG, low coercivity of 0.4 Oe and high permeability of 2600 at 5 MHz. Films containing up to 7.5% Cr showed an enhanced corrosion resistance and reduced reactivity with the bonding glass without degradation of soft magnetic properties, although the saturation magnetization was decreased slightly with the Cr addtion.

• The Korean Journal of Financial Management
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• v.10 no.1
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• pp.199-229
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• 1993

본 연구(硏究)는 선물거래의 선진국이라고 할 수 있는 미국(美國), 영국(英國), 일본(日本)등을 대상으로 선물계약(先物契約)의 증거금변경(證據金變更)이 시장활동(市場活動) 즉 거래량(去來量), 미결제포지션(open interest), 가격변동성(價格變動性)에 미치는 영향(影響)을 만기별(滿期別)로 구분하고 또한 시계열(時系列) 현상(現狀)을 제거한 후 비교분석(比較分析)함으로써 이러한 분석결과를 토대로 우리나라가 주가지수선물을 도입하는데 있어서 차후의 증거금관리(證據金管理)에 대한 하나의 정책적(政策的) 방향(方向)을 제시(提示)하고자 하였다. 연구결과(硏究結果)를 요약(要約)하면 증거금(證據金)은 시장활동(市場活動)인 거래량(去來量)과 선물계약(先物契約)의 수요(需要) 즉 미결제포지션에는 상당한 영향(影響)을 미치나 가격변동(價格變動)에 미치는 영향은 미약하며 그러한 효과는 비교적 단기적(短期的)인 것으로 밝혀졌다. 아울러 그러한 효과는 국가간(國家間) 및 상품간(商品間)에 큰 차이 없이 거의 공통적(共通的)인 현상(現狀)임이 밝혀졌다. 구체적으로 본 연구가 시사하는 바는 연구결과(硏究結果) 중 증거금변경(證據金變更)에 따른 미결제포지션의 움직임을 거래량(去來量)과 연관(聯關)시켜 생각해 볼 때 증거금인하시(證據金引下時) 단기에 거래량이 유의적으로 증가하면서 동시에 미결제포지션이 유의적으로 증가하는 것으로 보아 증가되는 많은 거래량은 선물시장 참여자들이 새로운 포지션을 취하기 때문인 것으로 보여진다. 이러한 사실은 거래소가 증거금인하(證據金引下)를 통하여 잠재적인 시장참여자들의 비용(費用)을 낮춤으로써 시장유동성(市場流動性) 제고(提高)를 유도하는 경우 이러한 시도는 단기적(短期的)으로는 어느 정도 효과(效果)를 거둘 수 있음을 시준(示晙) 한다. 또한 증거금변경이 가격변동성(價格變動性)에 미치는 영향은 크지 않은 것으로 밝혀져 일반적으로 선물거래소들이 취하고 있는 증거금정책으로써 가격변동성을 관리하기 위한 증거금(證據金) 운용정책(運用政策)은 적어도 단기에 있어서는 어느 정도 효과를 보나 그 효과는 크지 않은 것으로 판단된다. 이러한 사실들은 증거금변경이 이루어지는 시점이 일반적으로 시장활동(市場活動)의 변화(變化)가 나타나기 시작한 후 1개윌 이내에 이루어져 왔다는 사실을 고려한다면 많은 선물거래소들이 취하고 있는 증거금관리정책은 비교적 단기적인 효과를 위한 것이며 그러한 정책(政策)들은 나름대로 소기의 목적(目的)으로 달성하고 있는 것으로 보인다. 끝으로 증거금변경이 선물시장활동에 미치는 효과의 국가간(國家間)의 차이(差異)가 없고 또한 상품간(商品間)에도 사실상 차이(差異)가 없다는 사실은 앞으로 선물시장을 개설할 우리나라의 입장에서 볼 때 선물증거금(先物證據金) 운용(運用)에 관한 정책수립시(政策樹立時) 금융선진국(金融先進國)의 증거금(證據金) 정책운용(政策運用)을 통한 시장관리(市場管理) 경험(經驗)을 어느 정도 참고할 수 있음을 시사한다고 할 것이다.