• Journal of Families and Better Life
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• v.22 no.4
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• pp.29-41
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• 2004

The patterns of mother-child personality match were investigated in the study. Further, the impact of goodness-of-fit between mother′s and child′s personality on maternal childrearing behaviors, child′s self-esteem, and child′s emotional intelligence was explored. The participants of this study were 1,060 fifth graders and their mothers from four different cities(Seoul. Suwon, Daejon, and Daegu). Six patterns of mother-child personality match were derived through cluster analysis and discriminant analysis. The most harmonious pattern in which maternal childrearing behavior was positive and child′s self-esteem and emotional intelligence were high appeared between mothers and children with high "stability" and "superiority" The least harmonious pattern was shown for the mothers with low "responsibility" and "reflectiveness" and high "dominance′and "sociability", and the children with low "stability" and "superiority".

• Journal of the Korean Data and Information Science Society
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• v.18 no.2
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• pp.315-326
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• 2007

The rapid proliferation of wireless networks and mobile computing applications has changed the landscape of network security. Anomaly detection is a pattern recognition task whose goal is to report the occurrence of abnormal or unknown behavior in a given system being monitored. This paper presents a dynamic anomaly detection scheme that can effectively identify a group of especially harmful internal masqueraders in cellular mobile networks. Our scheme uses the trace data of wireless application layer by a user as feature value. Based on the feature values, the use pattern of a mobile's user can be captured by rough sets, and the abnormal behavior of the mobile can be also detected effectively by applying a roughness membership function with both the age of the user profile and weighted feature values. The performance of our scheme is evaluated by a simulation. Simulation results demonstrate that the anomalies are well detected by the proposed dynamic scheme that considers the age of user profiles.

• Proceedings of the Korean Vacuum Society Conference
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• 2011.08a
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• pp.385-385
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• 2011

Ion beam Sputtering (IBS)를 이용한 물질 표면의 pattern 형성은 물리적 변수 조절로 손쉽게 nano structure의 크기와 형태를 조절할 수 있어 관심을 받고 있다. 본 연구발표에서는 massless Dirac Fermion behavior로 인한 highly carrier mobility와 같은 특성으로 인해 차세대 device material로 각광받고 있는 Graphene의 layered compound (층상구조) 형태인 HOPG (Highly Ordered Pyrolysis Graphite)에 IBS (Ion beam Sputtering)를 이용해 nano structure가 형성 가능함을 보이고 그 특징에 대해 소개하려 한다. HOPG(0001)를 Sputter 했을 때, 표면에 잘 정렬된 nano ripple pattern이 형성 가능함을 확인하였으며 sputter하는 시간을 변화하면 약 10 nm에서 80 nm까지 wavelength를 조절할 수 있다. 또한 이전의 IBS를 이용한 연구들에서 확인할 수 있는 다른 물질의 곧게 뻗은 nano ripple과는 다르게 ripple의 끝에 nano swab이 생기는 것을 AFM (Atomic Force Microscope)으로 확인할 수 있었다. 이러한 Graphite에서만 나타나는 Sputter에 의한 표면의 변화의 원인을 규명하고자 Sputter가 지속됨에 따라 나타나는 mopology의 roughness와 wavelength의 시간에 따른 dynamic scaling behavior를 확인하였고 그 얼개를 알기 위해 simulation을 수행 하였다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1999.05a
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• pp.442-446
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• 1999

Melting behavior and bridge phenomenon of solder paste, which is essential for surface mount technology in packaging, were investigated. solder paste of Sn-37%Pb was printed on Sn-coated Cu-pattern of PCB, and heated over melting point. Melting behavior of the paste was observed using CCD-camera. In order to modelize the melting and agglomeration phenomena of the paste, two solder balls of 0.76mm diameter were used. As experimental results, the paste start to melt from the margin of the printed shape. The hight of the melted paste decreased from 270 $\mu$m to 200 $\mu$m firstly, and finally recovered to 250 $\mu$m. During the melting procedure, pores were evolved from the molten paste. Bridge Phenomenon of the molten Paste depends upon the pitch of the pattern.

• Journal of Families and Better Life
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• v.10 no.2
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• pp.163-178
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• 1992

This study is focused on causual relationship analysis among the components of family resource management system based on a theory of Deacon and Firebaugh. The system of family resource management is consisted for the component of input like on objective resource and level of resource perception, the component of throughput like a behavior pattern of the family resource management, and the component of output like a degree of the family life satisfaction. The instrument for resource perception level, behavior pattern of family resource management and degree of life satisfaction were developed for this study, and main investigation was executed through 1st and 2nd pre-test. The 800 questionnaire were distributed by cluster sampling to the homemakers in Seoul. The final data used in this study were 703, and analyzed by Cronback's coefficient, factor analysis. frequency. percentage, regression analysis and path analysis, and teated with SAS PC+. Consequently , the findings of this study were accepted hypothesis I, II, II, IV.

• Journal of electromagnetic engineering and science
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• v.18 no.2
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• pp.129-135
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• 2018

This paper proposes a design of small controlled reception pattern antenna (CRPA) arrays using circular microstrip loops with frequency-insensitive characteristics. The proposed array consists of seven identical upper and lower circular loops that are electromagnetically coupled, which results in a frequency-insensitive behavior. To demonstrate the feasibility of the proposed feeding mechanism, the proposed array is fabricated, and its antenna characteristics are measured in a full-anechoic chamber. The operating principle of the proposed feeding mechanism is then interpreted using an equivalent circuit model, and the effectiveness of the circular loop shape is demonstrated by calculating near electromagnetic fields in proximity to the radiator. The results confirm that the proposed feeding mechanism is suitable to have frequency-insensitive behavior and induces strong electric and magnetic field strengths for higher radiation gain in extremely small antenna arrays.

• Journal of the Korean Graphic Arts Communication Society
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• v.30 no.2
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• pp.23-33
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• 2012

With the development of many display technologies currently applied to them in the field of printed electronics, there have been many researches that high resolution printing for thin and uniform pattern. In this paper, printing ink flow properties in the reverse offset mechanism were simulated. The aim of this research is to expect the ink flow behavior between cliches to make fine pattern by a printing technique which is a reverse offset. The simulation results show that almost the same as the experiments and the flow behavior according to the ink film thickness and printing pressure changes could be expected.

• Smart Structures and Systems
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• v.22 no.6
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• pp.643-662
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• 2018

One of the methods for investigation of mechanical behavior of materials is numerical simulation. For simulation, its need to model behavior is close to real condition. PFC is one of the rock mechanics software that needs calibration for models simulation. The calibration was performed based on simulation of unconfined compression test and Brazilian test. Indeed the micro parameter of models change so that the UCS and Brazilian test results in numerical simulation be close to experimental one. In this paper, the effect of four micro parameters has been investigated on the uniaxial compression test and Brazilian test. These micro parameters are friction angle, Accumulation factor, expansion coefficient and disc distance. The results show that these micro parameters affect the failure pattern in UCS and Brazilian test. Also compressive strength and tensile strength are controlled by failure pattern.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.53-54
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• 2009

본 논문은 홈 네트워크 시스템에서 사용자 프로파일을 기반으로 거주자의 행동패턴을 예측하고 분석하는 BPP(Behavior Pattern Prediction) 알고리즘을 제안한다. BPP 알고리즘은 거주자가 어느 방에 자주 방문하고, 어떤 행동을 자주 반복 하는지 파악을 하여 사용자 프로파일을 구축한다. 그리고 사용자가 머물렀던 방에 대한 관심을 객관적으로 측정하기 위해 거주지 사용자의 흥미에 대해서 가중치(weight)를 부여 한다. 사용자의 프로파일로부터 얻어진 데이터에 근거를 둔 가중치가 높을수록 사용자의 행동과 방에 대한 연관성이 높다는 것을 나타낸다. BPP 알고리즘의 특징은 시간대 별로 가중치를 측정하여 사용자의 다음 행동을 예측하고, 객관적으로 사용자의 행동 패턴을 분석한다.

• International Journal of Human Ecology
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• v.12 no.1
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• pp.15-24
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• 2011

This study investigated childhood eating behavior, the influence of eating behavior on the positive and negative emotionality of children, and the pattern or eating behavior influence on emotionality depending on the age and gender of children. A total of 202 children (ages 5 to 7) were selected from 3 nurseries and 1 kindergarten ill Seoul and the survey data responses from teachers were analyzed. The results were as follows. First, children with higher levels of eating behavior showed a higher positive emotionality score compared to those with lower levels of eating behavior. The effect of gender was not significant and positive emotionality tended to increase in the 5 and 6 year old groups as the level of eating behavior increased; in addition, it was generally similar in the 7 year old group. Second, the children with lower level, of eating behavior showed a higher negative emotionality score compared to those with higher levels of eating behavior. The main effects by age and gender were insignificant; however, the interaction of age and eating behavior affected the negative emotionality of children. The eating behavior of children affects emotionality and children with better eating behaviors showed more positive emotional responses and less negative emotional responses in the same circumstances.