• Journal of the Korean Society for Industrial and Applied Mathematics
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• v.13 no.1
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• pp.21-29
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• 2009

This paper treats the conditions for the existence and stability properties of stationary solutions of a predator-prey interaction with self and cross-diffusion. We show that at a certain critical value a diffusion driven instability occurs, i.e. the stationary solution stays stable with respect to the kinetic system (the system without diffusion) but becomes unstable with respect to the system with diffusion and that Turing instability takes place. We note that the cross-diffusion increase or decrease a Turing space (the space which the emergence of spatial patterns is holding) compared to the Turing space with self-diffusion, i.e. the cross-diffusion response is an important factor that should not be ignored when pattern emerges.

• Korean Journal of Medicinal Crop Science
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• v.16 no.5
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• pp.287-293
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• 2008

This study was conducted to determine the characteristics of fertilization process and embryo development of Astragalus membranaceus Bunge (Astragali Radix) to provide basic data needed in its breeding. A. membranaceus showed poor seed setting when self-pollination was induced. When artificial pollination was induced, it showed less than 5% bearing in late August, but more than 13% bearing from the beginning of September 4th. The flower size was about $17.0\;mm{\times}4.0\;mm$ and pistils and stamens had the same length of 15.0mm at flowering stage. When self-pollination or cross-pollination was induced, pollen tubes extended to an ovule. While pollen tube was extending to the ovule, reproductive cell split and formed two male generative nuclei and a vegetative nucleus. In the case of self-pollination, fertilized embryo was not observed, but was formed in the case of cross-pollination. A. membranaceus is noted to have zygote self-incompatibility. In the case of cross-pollination, fertilization was observed in 6 to 8 h after pollination, where apical cell derivatives split after fertilization. A spherical pro-embryo was then formed three days after fertilization. The seed attained full shape with a seed coat showing its distinctive contour 15 days after fertilization. Thus, A. membranaceus in Leguminosae family is found to have zygote selfincompatibility although its flower shape is shown to match the self-compatibility plant.

• BMB Reports
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• v.30 no.1
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• pp.18-20
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• 1997

Lycopersicon peruvianum shows a gametophytic self-incompatibility (GSI). GSI is controlled by a single locus (S locus) with multiple alleles. S ribonucleases encoded in S alleles cosegregate with their phenotypes of GSI in genetic cross. To understand the genetic role of S allele in L peruvianum, two large genomic fragments isolated previously were analyzed with total genomic DNAs from several tomato lines generated by cross-pollination. Southern blot analysis with the S allele fragments as probes revealed that the flanking region of S allele contained the highly homologous regions. It is speculated that they may play an important role to prevent genetic cross by self-pollination.

• 제어로봇시스템학회:학술대회논문집
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• 1996.10b
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• pp.920-923
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• 1996

This paper presents a new algorithm for the self-localization of a mobile robot using perspective invariant(Cross Ratio). Most of conventional model-based self-localization methods have some problems that data structure building, map updating and matching processes are very complex. Use of the simple cross ratio can be effective to the above problems. The algorithm is based on two basic assumptions that the ground plane is flat and two parallel walls are available. Also it is assumed that an environmental map is available for matching between the scene and the model. To extract an accurate steering angle for a mobile robot, we take advantage of geometric features such as vanishing points(V.P). Point features for computing cross ratios are extracted robustly using a vanishing point and the intersection points between floor and the vertical lines of door frames. The robustness and feasibility of our algorithms have been demonstrated through experiments in indoor environments using an indoor mobile robot, KASIRI-II(KAist SImple Roving Intelligence).

• Korean Journal of Child Studies
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• v.26 no.1
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• pp.169-182
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• 2005

Influence of parenting, peer relationship, and teacher's support on the development of children's self-concept was assessed in Korean and Korean-Chinese elementary school students. Subjects were 280 Korean children in Korea and 210 Korean-Chinese children in Shenyang, China. The Self-Perception Profile for Adolescents(Harter, 1988), Parenting Practice(Cho et al., 2001), and 4 items from Social Support(Koo, 2000) were used to measure self-concept, parenting, and peer relationships, respectively. Data were analyzed by Pearson's correlation, factor analysis, and multiple regression. Results revealed differential influences between the two cultures : Korean children's self-concepts were significantly influenced by his/her peer relationships and teacher's support while Korean-Chinese children's self-concepts were influenced by teacher's support and parenting.

• Journal of Families and Better Life
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• v.24 no.4 s.82
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• pp.141-149
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• 2006

This study investigated cross-informant measures of peer group victimization. The subjects were 460 children in the fifth and sixth grades. Children completed questionnaires that assessed their own victimization feelings of loneliness, and self-perception. They also completed peer nominations concerning peer acceptance and rejection. The results suggest that self-reported victimization is more predictive of loneliness and self-perception, whereas victimization from peer nominations is more predictive of peer rejection and acceptance.

• Journal of the Korean Home Economics Association
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• v.47 no.1
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• pp.65-73
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• 2009

The present longitudinal study examined reciprocal influence between self-esteem and academic achievement using cross-lagged autoregressive model. This study employed data(four wave) from Korea Youth Panel Survey. Participants were 300 students(143 boys, 157 girls) who were 4th graders in 2004 and 7th graders in 2007. The results of this study indicated that 4th graders' self-esteem influenced 5th graders' academic achievement, in turn, 5th graders' academic achievement influenced 6th graders' self-esteem. However, students' self-esteem in 6th grade did not influence their academic achievement during 7th grade. Conversely, 6th graders' academic achievement influenced 7th graders' self-esteem.

• Korean Journal of Breeding Science
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• v.43 no.5
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• pp.368-374
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• 2011

Apricot (Prunus armeniaca L.) cultivars show a gametophytic self-incompatibility (GSI) system, like other fruit species of Rosaceae family. Thus, it is necessary to determine their S-genotypes in order for stable fruit set in commercial cultivation. S-genotypes of apricots were determined by PCR and test crosses. Three sets of consensus primers designed from Prunus S-RNases were used to amplify fragments containing the first and second S-RNase intron, respectively. Through the results obtained from the 3 PCRs, we could identify SI genotypes of 33apricot cultivars. Several cultivars such as 'Heiwa', 'Yamagata No.3' and 'Shinsuoomi' had the self-compatible (Sc) allele. Self-pollination tests revealed that cultivars with Sc allele were self-compatible. Cross-pollination tests confirmed that there was cross-incompatibility between the cultivars with the same S-genotypes. These results might be very useful for growers for effective pollination and for breeders using these in cross breeding programs.

• Journal of Korean Medicine for Obesity Research
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• v.19 no.1
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• pp.24-30
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• 2019

Objectives: Eating self-efficacy is an important predictor of successful weight control behaviors during obesity treatment. The Weight Efficacy Life-Style Questionnaire (WEL) is an internationally used measure of eating self-efficacy. The objective of this study was to develop the Korean version of WEL (K-WEL) and verify face validity. Methods: According to previously published guidelines, the cross-cultural translation was conducted through organizing the expert committee, translation, back-translation, synthesis, grammar review, and final synthesis. Following the translation of the WEL into Korean, face validity was performed for 35 subjects. Results: After all the versions of the questionnaire were examined, the translated WEL questionnaires were finally synthesized and licensed by the developer in writing. Regarding the translated WEL questionnaires, seven out of 35 subjects (20%) offered ideas about ambiguous expressions in them. All four points indicated in the face validity verification were additionally modified for greater clarity and understanding. Conclusions: We developed the Korean version of WEL and completed face validity. In future research, it would be necessary to provide further study on the reliability and validity of the Korean version of WEL.

• Restorative Dentistry and Endodontics
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• v.49 no.2
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• pp.18.1-18.13
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• 2024

Objectives: This study was conducted to evaluate the mechanical properties of relined and non-relined fiberglass posts when cemented to root canal dentin using a conventional dual-cure resin cement or a self-adhesive resin cement. Materials and Methods: Two types of resin cements were utilized: conventional and self-adhesive. Additionally, 2 cementation protocols were employed, involving relined and non-relined fiberglass posts. In total, 72 bovine incisors were cemented and subjected to push-out bond strength testing (n = 10) followed by failure mode analysis. The cross-sectional microhardness (n = 5) was assessed along the root canal, and interface analyses (n = 3) were conducted using scanning electron microscopy (SEM). Data from the push-out bond strength and cross-sectional microhardness tests were analyzed via 3-way analysis of variance and the Bonferroni post-hoc test (α= 0.05). Results: For non-relined fiberglass posts, conventional resin cement exhibited higher pushout bond strength than self-adhesive cement. Relined fiberglass posts yielded comparable results between the resin cements. Type II failure was the most common failure mode for both resin cements, regardless of cementation protocol. The use of relined fiberglass posts improved the cross-sectional microhardness values for both cements. SEM images revealed voids and bubbles in the incisors with non-relined fiberglass posts. Conclusions: Mechanical properties were impacted by the cementation protocol. Relined fiberglass posts presented the highest push-out bond strength and cross-sectional microhardness values, regardless of the resin cement used (conventional dual-cure or self-adhesive). Conversely, for non-relined fiberglass posts, the conventional dual-cure resin cement yielded superior results to the self-adhesive resin cement.