• Korean Journal of Social Welfare Studies
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• v.47 no.4
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• pp.43-69
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• 2016

This study explored whether there are differences in the lives of the poor when they reside in areas with different socioeconomic conditions. Especially the poor living in areas with high poverty are the main focus here, so this study demonstrated their levels of neighborship and mental health. In order to analyze it, 2012 Korean General Society Survey(94 areas, 1,396 individuals) was used and the interaction effect between area poverty and individual poverty was found. As a result, the poor living in deprived areas reported higher social ties with neighbors than the poor living in wealthy areas. Furthermore, double poverty status also increased their psychological well-being level so that it suggested the poor community could be the supportive base for the poor in terms of mental health as well. The meanings of relationships the poor have in poor areas were discussed, and the implications were followed.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.14 no.2
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• pp.149-160
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• 2021

In this study, artificial intelligence-based algorithms were proposed, which included a fuzzy search for matching suspects between current and historical crimes in order to obtain related cases in criminal history, as well as conditional generative adversarial networks for crime prediction system (CPS) using Timor-Leste as a case study. By comparing the data from the criminal records, the built algorithms transform witness descriptions in the form of sketches into realistic face images. The proposed algorithms and CPS's findings confirmed that they are useful for rapidly reducing both the time and successful duties of police officers in dealing with crimes. Since it is difficult to maintain social safety nets with inadequate human resources and budgets, the proposed implemented system would significantly assist in improving the criminal investigation process in Timor-Leste.

• The Journal of the Korea Contents Association
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• v.19 no.8
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• pp.44-57
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• 2019

As dance performances in the theater space are centered on text, they have plots and make characters stand out. They also emphasize expressivity and technique, and their recognition of space is very modern and typical of dichotomous Cartesian thinking. The museum space has many similarities with the theater space in that it is a result of modernity and granted authority to present arts. The performances in museums place value more on the presence than on the representation. For this reason, works in museums, which are frequently presented in recent years, are mainly works of site-specific or performative concepts. Now, rather than being able to obtain from aesthetics defined as works, the museum is assured its own aesthetic production and justification, paying attention to the performance as an event occurring now and here.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.10a
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• pp.985-988
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• 2014

This study was conducted to investigate antioxidative activities of ethanol extracts from Erigeron canadensis L. The ethanol extracts were measured to examine total flavonoids and polyphenol content, DPPH radical activity and SOD-like activity. Total flavonoids content in leaf extract (42.19 mg/g) and total polyphenol content in flower extract (74.26 mg/g) were higher than those of other parts. All assays were conducted at concentrations of 0.1, 0.3, 0.5, and 1 mg/mL ethanol extracts. The DPPH radical activity of leaf, flower, the whole plant, and root extracts were 91.75%, 86.95%, 83.95% and 83.43%, respectively, at a concentration of 1 mg/mL. The activities were concentration dependent. The SOD-like activity of ethanol extracts from different parts was 7.91~13.54% at a concentration of 1 mg/mL. These results suggest that ethanol extracts from different parts of Erigeron canadensis L. could be used as antioxidative functional food sources.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.9 no.3
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• pp.63-74
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• 1999

In this paper we present a Hangul Encryption Algorithm (HEA) which encrypts composition Hangul syllables into composition Hangul syllables using the non-linear structure of Hangul. Since ciphertexts generated by HEA are displayable characters HEA can be used in applications such as Privacy Enhanced mail (PEM) where ciphertexts should be displayable characters. HEA is based on DES and it can be shown that HEA is as safe as DES against the exhaustive key search differential cryptanalysis and linear cryptanalysis. HEA also has randomness of phonemes of ciphertexts and satisfies plaintext-ciphetext avalanche effect and key-ciphertext avalanche effect.

• Journal of the Korea Society of Computer and Information
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• v.14 no.4
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• pp.179-187
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• 2009

Most real world systems contain a series of dynamic and complex phenomena. One of common methods to understand these systems is to build a model and analyze the behavior of them. A two-step methodology comprised of clustering and then model creation is proposed for the analysis on time series data. An interface is designed for CRM(Customer Relationship Management) that provides user with 1:1 customized information using system modeling. It was confirmed from experiments that better clustering would be derived from model based approach than similarity based one. Clustering is followed by model creation over the clustered groups, by which future direction of time series data movement could be predicted. The effectiveness of the method was validated by checking how similarly predicted values from the models move together with real data such as stock prices.

• Communications of Mathematical Education
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• v.37 no.2
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• pp.105-134
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• 2023

The purpose of this study is to explore which performance verbs are used in the achievement standards of the Korean mathematics curriculum and how to improve them. So, first, we analyzed whether there were differences in the performance verbs included in the 2015 revised mathematics curriculum achievement standards by school level. In addition, it was analyzed whether there were differences in the performance verbs included in the mathematics curriculum in Korea and foreign countries. As a result of the analysis, both the frequency and the type of performance verbs included in the achievement standards of the Korean mathematics curriculum decreased as the school level increased. Also, performative verbs such as 'understand' and 'know' were excessively used. Similar tendencies were seen in foreign mathematics curricula, but the frequency and the type of performance verbs were higher than those in Korea, and various performance verbs were used. As a result of the study, it is suggested that performance verbs included in achievement standards need to be improved to improve middle and high school mathematics classes.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.65 no.3
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• pp.172-181
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• 2020

Koshihikari has been one of the most popular rice cultivars with good eating quality since the 1960s despite its susceptibility to blast disease and lodging. To map the genes controlling blast resistance and to develop promising blast-resistant breeding lines inheriting Koshihikari's high eating quality, a recombinant inbred line (RIL) population was developed from a cross between Koshihikari and a blast resistance donor with early maturity, Baegilmi. A total of 394 Koshihikari × Baegilmi RILs (KBRIL), and the two parents, were evaluated for blast resistance and major agronomic traits including heading date, culm length, panicle length, and tiller number. A linkage map encompassing 1,272.7 cM was constructed from a subset of the KBRIL (n = 142) using 130 single nucleotide polymorphisms. Two quantitative trait loci (QTL) for blast resistance, qBL1.1 harboring Pish/Pi35 and qBL2.1 harboring Pib, were mapped onto chromosomes 1 and 2, respectively. qBL1.1 was detected in both of the experimental sites, Namwon and Jeonju, while qBL2.1 was only detected in Namwon. qBL1.1 and qBL2.1 did not affect agronomic traits, including heading date, culm length, panicle length, and tiller number. From the 394 KBRILs, lines that were phenotypically similar to Koshihikari were selected according to heading date and culm length and were further divided into the following two groups based on blast resistance: Koshishikari-type blast resistant lines (KR, n = 15) and Koshishikari-type blast susceptible lines (KS, n = 15). Although no significant differences were observed in the major agronomic traits between the two groups, the KR group produced a greater mean head rice ratio than the KS group. The present study provides useful materials for developing blast-resistant cultivars that inherit both Koshihikari's high eating quality and Baegilmi's blast resistance.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.28 no.1
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• pp.73-82
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• 2010

TERCOM(TERrain COntour Matching), which is the one of the Terrain Referenced Navigation and used in the cruise missile navigation system, is still under development. In this study, the TERCOM based on area-based matching algorithm and extended Kalman filter is analysed through simulation. In area-based matching, the mean square difference (MSD) and cross-correlation matching algorithms are applied. The simulation supposes that the barometric altimeter, radar altimeter and SRTM DTM loaded on board. Also, it navigates along the square track for 545 seconds with the velocity of 1000km per hour. The MSD and cross-correlation matching algorithms show the standard deviation of position error of 99.6m and 34.3m, respectively. The correlation matching algorithm is appeared to be less sensitive than the MSD algorithm to the topographic undulation and the position accuracy of the both algorithms is extremely depends on the terrain. Therefore, it is necessary to develop an algorithm that is more sensitive to less terrain undulation for reliable terrain referenced navigation. Furthermore, studies on the determination of proper matching window size in long-term flight and the determination of the best terrain database resolution needed by the flight velocity and area should be conducted.

• Korea journal of population studies
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• v.33 no.1
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• pp.133-160
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• 2010

This study aims to analyze marital satisfaction over the family life course and to find its determinants in Korea and Japan. The data for this study came from nationwide representative sample surveys on family in these two countries including 5,308 Korean and 4,920 Japanese men and women living with their spouses. In order to see the cultural difference and similarity in marital relations, the effects of education, income, employment, marriage gradients (normative patterns between the spouses), family stress, and quality of conjugal interactions on Korean and Japanese couples' marital satisfaction were examined. It was found that the marital satisfaction showed a U-shape pattern for both Korean and Japanese couples. In both countries husbands tend to have higher marital satisfaction than wives over the entire life course. The most important determinants of Korean and Japanese couples' marital satisfaction are good qualities of conjugal interactions including deep trust and concerns for spouse and sex life satisfaction. For Korean couples good conjugal interactions is better predictor of marital satisfaction than sex life, while for Japanese couples sex life is more important determinant of marital satisfaction.