• Transactions of the Korean Society of Machine Tool Engineers
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• v.17 no.3
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• pp.53-58
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• 2008

This study was conducted to evaluate the flatness of the porous type of dicing chuck. Two measurement systems for a vacuum chuck with a porous type of ceramic plate were prepared using a digital indicator and a laser interferometer. 6 inch of silicon and glass wafer were also used. Vacuum pressure from 100mmHg to 700mmHg by 100mmHg was increased. From experiments, chucked-wafer flatness was converged to the dicing chuck flatness itself even though the repeatability of contact method using indicator was unstable. Finally, the chuck flatness was estimated below $2{\mu}m$ with peak-to valley value.

• Journal of the Korean Society of Physical Medicine
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• v.5 no.1
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• pp.89-99
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• 2010

Purpose : This study were to examine the test-retest and inter-rater reliability as well as the concurrent validity, and convergent validity of the 2 simplified Postural Assessment Scale for Stroke:5itmes-3Level(PASS:5i-3L) & Berg Balance Scale:7items

• The Korean Journal of Applied Statistics
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• v.7 no.2
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• pp.159-171
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• 1994

Some rank score tests are proposed for testing the equality of all sampling distribution functions against umbrella location-scale alternatives in k-sample problem. Only the case of known peak $\ell$ is considered. Under the null hypothesis and a contiguous sequence of unbrella location-scale alternatives, the asymptotic properties of the proposed test statistics are investigated. Also, the asymptotic local powers are compared with each others. The results show that the tests based on the Chen-Wolfe rank analogue statistic are more powerful than others for unequally spaced umbrella location-scale alternatives and robust.

• Journal of the Korean Institute of Intelligent Systems
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• v.11 no.3
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• pp.270-274
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• 2001

Conventional similarity measures suggested so far can be classified into three categories: (i) geometric similarity measures, (ij) set-theoretic similarity measures, and (iii) matching function-based similarity measures. On the basis of the characteristics of the conventional similarity measures, in this paper, we propose a new similarity measure of fuzzy sets and investigate its properLies. Finally, numelical examples are provided for the comparison of characteristics of the proposed similarity measure and other previous similarity measures.

• Bulletin of the Society of Naval Architects of Korea
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• v.30 no.2
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• pp.17-30
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• 1993

세계 조선소 중 최근에 single hull VLCC를 가장 많이 건조한 경험을 바탕으로 4척의 double side VLCC를 성공리에 인도하여 선주측으로부터 호평을 받고, 나아가 전 세계 최초로 double hull VLCC의 2척 동시 진수라는 성과를 거둘 수 있었던 것은, 각 type의 특성을 고려한 최적의 구\ulcorner/생산설비 및 작업환경 등을 고려한 개선사항을 설계에 적극 반영한 결과로 나타난 것이다. 최근에 신규 수주 상담이 진행되고 있는 double hull VLCC 선주들의 대부분은 당사에서 single hull VLCC를 건조한 경험이 있는 선주들로서, 그동안 고객 만족을 위한 운항, 보수, 점검, 통해, 안전 및 편의성 등 선박 성능향상 측면에서 노력한 결과로 볼 수 있으며, 여기에서 만족하지 않고 당사의 Motto인 VOF( Vessel do the First Class) 구현을 이루고자 최선을 다하고져 한다.

• Annual Conference on Human and Language Technology
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• 2007.10a
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• pp.216-227
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• 2007

본고는 서로 다른 용어와 기준들로 일관성 없이 나열되어 있던 이전의 '-이나'의 의미 해석을 통합적으로 설명해 보고자 한다. 즉 특정한 양상 척도(개연성, 희구성, ${\ldots}$ 등)을 이용하여 '-이나'가 쓰인 맥락에 따라 척도 함축을 해석해 내고자 한다. 따라서 본고는 교착어의 특성을 가진 한국어의 특수조사(혹은 한정사) '-이나'의 함축 해석에서 척도의 유형을 분류함으로써 의미 해석과 형식화의 초석을 다지는 연구가 될 것이라고 기대한다. 먼저 '-(이)나'의 함축 해석에서 나타나는 척도의 유형에 대하여 논의하고자 한다. 따라서 '-(이)나'의 함축이 드러내는 척도들을 형식적으로'선형과 비선형'척도를 나누고 이러한 문장들이 들어내는 양상을 분류할 것이다. 둘째, 정대호 외(2002)에서 논의하고 있는 '~이나/도'가 분류사구와 결합한 문장이 화용론적인 개연성의 척도상에서 하한 값을 유발한다고 제안함에 따라, 본고는 양상을, 이러한 개연성의 척도를 포함한, '인식(진리, 원인, 지식, 평가), 의무(의지), 희구(기원)'의 3가지 양상으로 분류하고, 이에서 '-(이)나'가 유발하는 각각의 척도상의 함축을 기술할 것이다.

• Korean Journal of Child Studies
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• v.27 no.1
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• pp.1-15
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• 2006

The purpose of this study was to examine the reliability and validity of the School Adjustment Inventory for 1st grade elementary school students(SAI-1st Grade). The subjects of this study were 624 first grade children attending 40 elementary schools and 120 first grade teachers of G City. Data were analyzed by Factor Analysis(EFA), Confirmatory Factor Analysis(CFA), Pearson's r and Cronbach's ${\alpha}$. Results of the test on content validity as evaluated by the first grade teachers was high. It was found that the School Adjustment Inventory for 1st graders of elementary school was a reliable and valid measure for evaluating the school adjustment of first grade students.

• Journal of Families and Better Life
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• v.17 no.1
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• pp.57-72
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• 1999

The purpose of this study was to develop wholistic Family Functioning Scale for Korean family bases on FFS of Tavitian et al. The data for this study was got from the sample survey of 370 mothers who had children of education period living in Seoul and kyunggi-do. The major findings were summarized as follows: 1) Through item discrimination method 34 items of the total items showed a high index ranged from .29. to .77 of discrimination coefficient 2) Factor analytic procedures selected 29 items among 34 items and extracted 4 factors(Positive Fmaily Emotion Family Communication Participation in Family Event and Sharing Family Worries) These factors accounted for 93.03% of the total variance. 3) A multiple regression analysis conducted to reduce the number of items yielded 26 items for the Family Functioning Scale 4) Internal consistency reliability for this scale showed high internal consistency(Cronbach's a= .86)

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.275-277
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• 2018

선박 및 해상교통관제에 있어서 교통 혼잡구역에 대한 선박교통밀도 예측은 선박충돌사고 예방에 중요하다. 선박 교통밀도 예측정보는 사전에 진입하는 선박들에게 속력조정, 우회항로 이용 등 사전 조치가 가능하다. 본 연구에서는 해상 선박교통상황을 딥러닝 네트워크에 학습한 주의구역 선박교통류 예측 모델(Ship Traffic Extraction Network, STENet)을 제안하여 주의구역의 선박교통류 예측을 수행하고자 한다. STENet 모델 학습을 위해 여수해역 AIS 데이터를 전처리하고, 생성된 입력(해상교통상황)-출력(주의구역 교통밀도) 쌍 데이터를 적용하여 STENet 모델을 학습하였다. 학습된 모델을 이용하여 선박교통류 예측을 한 결과, 중기예측은 표준 절대 오차(mean absolute error)가 0.4-0.5척이 였으며, 장기예측은 0.7-0.8척의 오차로 기존의 Dead Reckoning에 의한 방법보다 50% 이상 교통밀도 예측성능이 향상 되었다.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.14 no.6
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• pp.8-15
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• 2005

The new square electro-magnetic chuck, which can be used for the clamping devices on a grinding machine, is developed in this study to improve the convenience of grinding works. The various kinds of structures are recommended to find the most adequate magnetic characteristics through the analytical approach using finite element methods. The analyzed results are retrofitted to solve the drawbacks of previous models step by step by considering the magnetic fields, strength and distribution of drag force, and thermal deformations of chuck such as high parallelism and flatness. Finally the best recommended models is designed to satisfy the KS specifications required fur the commercial magnetic chuck. The prototype chuck with this dimensions and structures is manufactured. For this final model, the experimental verifications are investigated whether the KS specifications are satisfied.