• Journal of Korean Ophthalmic Optics Society
• /
• v.11 no.2
• /
• pp.131-135
• /
• 2006

The purposes of this study is examining a wearing tendency of a progressive multifocal lens. We measured refractive error values using subjective and objective refraction method with subjects in 40-65 ages. Also, we investigated and analyzed distribution of addition power and wearing tendency of progressive multifocal lens. Detected addition powers were ranged of +0.75D - +3.00D. In case of average addition, they were detected with +1.18D in 40's, +1.55D - +1.97D in 50's and +2.38D in above 61's age. The distributions of visual ability at a distant were measured that the hyperopia and hyperopic astigmatism 43%, the myopia and myopic astigmatism characteristic astigmatism 7% appeared highly with 36%. The male who uses the interior aspect multi focal lens with the short-range work were appeared the male 20%, the woman 19%.

• The Journal of the Korea Contents Association
• /
• v.15 no.5
• /
• pp.98-107
• /
• 2015

This study analyzed the story of 'Good Morning, Ladies of the World', a multicultural program of a community radio Gwanak FM. Furthermore, the study performed an in-depth interview on Korean producing staffs and migrant casts in order to figure out the contents for the improvement of awareness and for the design of multicultural media story telling. As a result, the migrant women presented overall public discourses on their own culture, climate and customs as a sense of representative. While Korean staffs wanted to understand and communicate with their culture and to share private experiences, migrant women wished understanding and respect to their culture and removal of discrimination or prejudice. Accordingly, the storytelling design for the improvement of multicultural awareness must be a private discourse on the basis of a public discourse, and it turned out that the user of a mediator who experienced and knew culture of Korea and the migrant is necessary. And, this study recommended the need of education of migrant women and media support for a proper story planning, structuring and delivery.

• Journal of Agricultural Extension & Community Development
• /
• v.21 no.1
• /
• pp.143-176
• /
• 2014

In this study, the multicultural families female marriage immigrants experience life in Korea to evaluate the difficulty. To this end, a multi-cultural families living in Gyeonggi Province accomplished female marriage immigrants choose eight people to consensual conduct in-depth interviews with qualitative analysis methods(CQR) were analyzed using. The findings in the three categories and therefore the region of 49 to 12 depending on the frequency analysis. Female marriage immigrants living in Korea psychological and emotional difficulties experienced in the relationship with your spouse, in-laws and relations, communication problems, difficulties in expressing emotional difficulties, respectively. Social and economic difficulties experienced discriminatory gaze, economic hardship, as a multicultural families become psychological atrophy, life, customs, and cultural differences, respectively. The process of coping with these experiences self-help meetings, participate in cultural programs, and community systems were used. By the results of this study multicultural families immigrant women to help overcome difficulties in the practical help and social services to the community through the ongoing support system was required to suggestions.

• Clinical and Experimental Reproductive Medicine
• /
• v.27 no.2
• /
• pp.173-177
• /
• 2000

연구목적: 한국여성의 다낭성 난포증후군 환자에서 황체형성 호르몬 exon 2 유전자의 변이를 탐색하여 이들 변이와 질환과의 관련성 여부를 밝히고자 하였다. 연구재료 및 방법: 21명의 다낭성 난포증후군 환자를 대상으로 황체형성 호르몬 exon 2(Trp8Arg;TGG to CGG and Ile15Thr; ATC to ACC)의 변이를 탐색하였다. 혈액에서 Genomic DNA를 추출하여 PCR로 증폭한 후 RFLP 방법으로 변이형을 구분하였다. 결과: 황체형성 호르몬 exon 2의 변이형이 다낭성 난포증후군 환자에서 28.6%로 이미 조사된 바 있는 대조군의 16.7% 보다 약간 높게 나타났으나 통계적으로 유의한 차이는 없었다(p>0.05). 결론: 황체형성 호르몬 exon 2의 변이가 한국인의 다낭성 난포증후군 발병과 관련이 있는지를 밝히기 위해 더 많은 개체에 대한 연구가 요구된다.

• Journal of the Korea Convergence Society
• /
• v.8 no.3
• /
• pp.49-61
• /
• 2017

Recently, convenience and usability are increasing with the development and deployment of various mobile applications on the Android platform. However, important information stored in the smartphone is leaked to the outside without knowing the user since the malicious mobile application is continuously increasing. A variety of mobile vaccines have been developed for the Android platform to detect malicious apps. Recently discovered server-based polymorphic(SSP) malicious mobile apps include obfuscation techniques. Therefore, it is not easy to detect existing mobile vaccines because some other form of malicious app is newly created by using SSP mechanism. In this paper, we analyze the correlation between the similarity of the method in the DEX file constituting the core malicious code and the permission similarity measure through APK de-compiling process for the SSP malicious app. According to the analysis results of DEX method similarity and permission similarity, we could extract the characteristics of SSP malicious apps and found the difference that can be distinguished from the normal app.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.21 no.9
• /
• pp.1635-1641
• /
• 2017

In this paper, a trellis-coded 3-dimensional (3-D) orthogonal frequency division multiplexing (OFDM) system is presented and its performance is analyzed. Here, a set-partitioning technique for trellis coding with respect to a 3-D signal constellation is also presented. We show theoretically that the proposed system, which exploits a trellis coding scheme with recursive systematic convolutional codes (RSC) of code rate R = 1/3 and 2/3, can improve symbol error rate (SER) up to 7.8 dB as compared with the uncoded OFDM system in an additive white Gaussian noise (AWGN) channel. Computer simulation confirms that the theoretical analysis of the proposed system is very accurate. It is, therefore, considered that the proposed trellis-coded 3-D OFDM system is well suited for the high quality digital transmission system without increase in the available bandwidth.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.19 no.12
• /
• pp.2313-2327
• /
• 1994

As the communication environment evolves, there is an increasing need for multiresolution image coding. To meet this need, the entrophy constratined vector quantizer(ECVQ) for coding of image pyramids by spline wavelet transform is introduced in this paper. This paper proposes a new scheme for image compression taking into account psychovisual feature both in the space and frequency domains : this proposed method involves two steps. First we use spline wavelet transform in order to obtain a set of biorthogonal subclasses of images ; the original image is decomposed at different scale using a pyramidal algorithm architecture. The decomposition is along the vertical and horizontal directions and maintains constant the number of pixels required the image. Second, according to Shannon's rate distortion theory, the wavelet coefficients are vectored quantized using a multi-resolution ECVQ(entropy-constrained vector quantizer) codebook. The simulation results showed that the proposed method could achieve higher quality LENA image improved by about 2.0 dB than that of the ECVQ using other wavelet at 0.5 bpp and, by about 0.5 dB at 1.0 bpp, and reduce the block effect and the edge degradation.

• Composites Research
• /
• v.12 no.2
• /
• pp.10-25
• /
• 1999

A new evaluation method for the interfacial properties of fibrous composites based on a fragmentation technique is proposed by using the gradual multi-fiber composite, in which the inter-fiber spacing is gradually changed. The results showed that as the inter-fiber distance increased, the aspect ratio of broken fibers decreased while the interfacial shear strength between the fiber and matrix increased. When the reciprocal of the inter-fiber destance was taken for the above relations, both the aspect ratio and interfacial shear strength showed a saturated value. This means that the gradual multi-fiber composite indicates an upper bound in aspect ratio and an upper bound in interfacial shear strength. It was concluded that this fragmentation test could be a new method for composite evaluation, since reducing a difference between these two bounds is effective for composite strengthening. In addition an elastoplastic finite element analysis was carried out to relate the above results with fiber stress a distribution around fiber breaks. It was proved that the bound obtained in the gradual multi-fiber composite test is closely related to stress concentrations caused by a group of multi-fiber breaks.

• Journal of the Korea Society of Computer and Information
• /
• v.18 no.1
• /
• pp.11-19
• /
• 2013

For an autonomous multi-mobile robot system, path planning and collision avoidance are important functions used to perform a given task collaboratively and cooperatively. This study considers these important and challenging problems. The proposed approach is based on a potential field method and fuzzy logic system. First, a global path planner selects the paths of the robots that minimize the cost function from each robot to its own target using a potential field. Then, a local path planner modifies the path and orientation from the global planner to avoid collisions with static and dynamic obstacles using a fuzzy logic system. In this paper, each robot independently selects its destination and considers other robots as dynamic obstacles, and there is no need to predict the motion of obstacles. This process continues until the corresponding target of each robot is found. To test this method, an autonomous multi-mobile robot simulator (AMMRS) is developed, and both simulation-based and experimental results are given. The results show that the path planning and collision avoidance strategies are effective and useful for multi-mobile robot systems.

• Journal of Digital Convergence
• /
• v.15 no.2
• /
• pp.375-383
• /
• 2017

The purpose of this study is to review whether the self-esteem of Republic of Korea army officers and noncommissioned officers affect cultural acceptability and at the same time to determine whether these relationships are mediated by adjustment to military life and job satisfaction. For this purpose, we conducted a survey by random sampling of 580 officers and noncommissioned officers serving in the army units located in Gyeonggi Province and Gangwon Province. The collected data was analyzed by a structural equation model, including statistical and correlation analysis. As a result of analysis, self-esteem of the military officers and noncommissioned officers appeared to be mediated only by military life adjustment, or to affect the cultural acceptability mediated by the military life and job satisfaction in turn. Therefore, in order to increase the cultural acceptability of military officers and noncommissioned officers, ROK Army should enhance the self-esteem, job satisfaction and adaptability of them.