• Journal of the Korean Home Economics Association
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• v.41 no.2
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• pp.31-42
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• 2003

The purpose of this research is to find the relational influences of maternal child rearing behavior and peer acceptance on children's self esteem. The sample subject were 200 of fourth/sixth grade of elementary school. The major findings of the research were as follows : First, the scores of peer acceptance, social acceptance, behavior conduct, global self-worth and affect tend to be over the mean scores. Second, the influences of maternal child rearing behaviors and peer acceptance on children's self esteem found significant due to the sub-areas of self-esteem. The affectionate child rearing affects all sub-areas of self-esteem. Overprotection and peer acceptance affect social acceptance. In addition, gender affect cognitive ability and fade affects global self-worth.

• Journal of electromagnetic engineering and science
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• v.4 no.4
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• pp.175-182
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• 2004

When the M-ary signal experiences the Rayleigh fading, the diversity schemes can reduce the effect of fading since the probability that all the signals components will fade simultaneously is reduced considerably. The symbol error probabilities for various M-ary signals, such as MDPSK(M-ary DPSK) and MPSK(M-ary PSK), are mathematically derived for the Selection Combining 2(SC-2) and Selection Combining 3(SC-3) demodulation system which requires a less complex receiver than Maximum Ratio Combining(MRC). The propagation model used in this paper is the frequency-nonselective slow Rayleigh fading channel corrupted by the Additive White Gaussian Noise(AWGN). The numerical results presented in this paper are expected to provide information for the design of radio system using M-ary modulation method for above mentioned channel environment.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2016.06a
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• pp.66-67
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• 2016

본 논문에서는 정지영상에 주로 적용되어 왔던 히스토그램 등화 (histogram equalization) 기법을 실시간 동영상 화질향상에 이용할 수 있도록 확장한다. 우선, 동영상의 히스토그램 등화를 실시간으로 동작하기 위한 방안으로, 이전 프레임들의 히스토그램을 이용하여 현재 프레임의 변환 함수를 구성하는 방법을 제안한다. 또한 페이드-인 (fade-in) 등과 같이 장면 전환을 위한 특수 효과를 적용한 동영상이나 장면의 특성상 낮은 화소값이나 높은 화소값들만으로 구성된 동영상에 대해 히스토그램 등화를 적용할 경우 발생하는 문제점을 극복하기 위한 방법을 제시한다. 따라서 제안하는 알고리듬을 적용하여 동영상의 히스토그램 등화를 수행하면 실시간 동영상 처리가 가능할 뿐만 아니라, 다양한 특수 기법들을 사용한 동영상을 효과적으로 개선하여 향상된 화질의 동영상을 얻을 수 있다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2009.01a
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• pp.207-210
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• 2009

Edge detection is an important process in low level image processing. But many proposed methods for edge detection are not very robust to the image noise and are not flexible for different images. To solve the both problems, an algorithm is proposed which eliminate the noise by mean shift algorithm in advance, and then adaptively determine the double thresholds based on gradient histogram and minimum interclass variance, With this algorithm, it can fade out almost all the sensitive noise and calculate the both thresholds for different images without necessity to setup any parameter artificially, and choose edge pixels by fuzzy algorithm.

• Proceedings of the Korean Society of Computer Information Conference
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• 2009.01a
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• pp.211-214
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• 2009

Edge detection always influenced by noise belong to the original image, therefore need use some methods to sort this issue, mean shift algorithm has the smooth function which suit for the edge detection purpose, so adopted to fade out the unimportant information, and the sensitive noise portions. After this section, use the Canny algorithm to pick up the contour of the objects we focus on, meanwhile select the Soble operator that has the orientation attribute to support the method work well. In final, take experiment and get the perfect result we wanted, make sure this method make sense and better than the sole Edge detection algorithm,

• Journal of the Korean Society of Clothing and Textiles
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• v.7 no.1
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• pp.11-16
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• 1983

Variance of whiteness after graft copolymerization of acrylonitrile, methylmethacrylate and acrylamide onto bleached cellulose using Ce(IV) salt as initiators and the effect of homopolymer on the grafted fibers by photo-irradiation were studied. Also, the development of Yellowing were determined after carbon-arc radiation in a Fade-o-meter. The results were as follows: (1) Variation of whiteness of grafted cellulose fibers were influenced by graft-ratio, Inorganic-Organic Balance (IOB) of functional group in used monomers and adhering homopolymers on the grafed fibers. (2) Yellowing was not affected by the concentration of Ceric Ammonium Nitrate directly during reaction (eg. 0.008>0.006>0.014 M).

• Journal of the Korean Operations Research and Management Science Society
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• v.29 no.4
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• pp.141-157
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• 2004

In this paper, we consider broadband satellite systems using MF-TDMA(Multi-Frequency Time Division Multiple Access) scheme. First, we analyze return link, superframe structure, and QoS( Quality of Service) parameters in broadband satellite systems, and mathematically formulate the QoS-based optimal timeslot allocation problem as a nonlinear integer programming problem for broadband satellite systems with clear-sky and rain-fade satellite terminals, and multiple data classes. Next, we modify the proposed problem to solve it within in a fast time, and suggest the QoS-based optimal timeslot allocation scheme. Extensive simulation results show that the proposed scheme finds an optimal solution or a near optimal solution within 5ms at Pentium IV PC.

• Elastomers and Composites
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• v.27 no.1
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• pp.13-19
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• 1992

In this work, properties of ABS/AES blends were investigated. Blends were prepared by casting from THF. The thermal stability, light resistance, storage modulus and flame retardancy were measured by thermogravimetric analysis, cole. difference in Fade-o-meter, Rheovibron, and limiting oxygen index(LOI). The thermal stability, light resistance and storage modulus increased with increasing contents of AES. ABS and AES showed similar LOI. The LOI of the ABS/AES blends increased with rising contents of AES but all the blends were found to be flammable. It was observed that ABS and AES was incompatible from the morphology by scanning electron microscope(SEM).

• Korean Journal of Biological Psychiatry
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• v.18 no.2
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• pp.80-89
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• 2011

Pavlovian fear conditioning has been extensively studied for the understanding of neurobiological basis of memory and emotion. Pavlovian fear conditioning is an associative memory which forms when conditioned stimulus (CS) is paired with unconditioned stimulus (US) once or repeatedly. This behavioral model is also important for the understanding of anxiety disorders such as posttraumatic stress disorder. Here we describe the neural circuitry involved in fear conditioning and the molecular mechanisms underlying fear memory formation. During consolidation some memories fade out but other memories become stable and concrete. Emotion plays an important role in determining which memories will survive. Memory becomes unstable and editable again immediately after retrieval. It opens the possibility for us of modulating the established fear memory. It provides us with very efficient tools to improve the efficacy of cognitive-behavior therapy and other exposure-based therapy treating anxiety disorders.

• Journal of the Institute of Electronics Engineers of Korea TE
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• v.37 no.3
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• pp.60-65
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• 2000

We propose a new method to deal with the optimal gain self-tuning of the PID controller which is used to industrial process control in various fields. First of all, in this method, first order delay system which was modeled from the unit step response of the system is Pade-approximated, then initial values are determined by the Ziegler-Nickels method. Finally, we can find the parameters of Pm controller so as to maximize the fuzzy inferencl function which includes the maximum overshoot, damping ratio, rising time and settling time. The proposed method also shows good adaptability for variations in characteristics and dead time of the system.