• Journal of the korean academy of Pediatric Dentistry
• /
• v.50 no.1
• /
• pp.24-34
• /
• 2023

The aim of this study was to retrospectively analyze the effects of pulp treatment on exfoliation of primary teeth and its related factors. In this study, 167 teeth of 97 patients aged 6 months to 12 years who were treated with pulp treatment at Dankook Dental Hospital were selected, and information related to pulp treatment and tooth loss was collected. The included subjects were 72 primary anterior teeth (43.1%) and 95 primary posterior teeth (56.9%), of which 56 were males (57.7%) and 41 females (42.3%). The mean follow-up period was 106.1 ± 38.7 months, and the mean age at pulp treatment was 34.8 ± 15.4 months for primary anterior teeth and 69.1 ± 25.1 months for primary posterior teeth. Unilaterally pulpectomized teeth were significantly exfoliated earlier than the same tooth on the opposite side (p < 0.05). Also, in the case of teeth with periapical lesions, despite pulp treatment, the probability of extraction due to infection has been increased on primary anterior teeth (p < 0.05), but not on posterior teeth (p > 0.05). Pulpectomized teeth were lost earlier, an average of 7.8 months for primary anterior teeth and 8.5 months for primary posterior teeth. Early loss of the primary tooth can lead to space loss and premature eruption of the successor, so this can be considered when planning or performing treatment of the primary tooth.

• Journal of Korean Home Economics Education Association
• /
• v.35 no.2
• /
• pp.111-132
• /
• 2023

The objective of this research is to conceptualize care competences for adolescents and to develop a valid measurement tool based on this conceptualization. The primary aim is to establish a solid foundation for effective communication in teaching care competences within the domain of home economics education. To achieve this, a comprehensive review of relevant literature and previous studies was conducted, and consultations with experts were undertaken to assess content and criterion-related validity. Furthermore, exploratory and confirmatory factor analyses were performed. The findings from these analyses resulted in a set of 34 items, which were categorized into five distinctive factors representing care competences in adolescents. These factors encompassed four items of care thinking, seven items of care emotion, six items of care behavior, seven items of self-care and ten items of community-care. Additionally, a reliability analysis was performed on the model, confirming the stability and consistency of the five factor structure and the 34 item scale, which assess care competences in adolescents.

• Korean Journal of Culture and Social Issue
• /
• v.29 no.3
• /
• pp.305-320
• /
• 2023

Research on offense judgment differing by victim typicality has usually focused on sexual violence, and studies on victim typicality of dating violence remain scarce. However, the social concern for the recent increase of dating violence cases demands research on social stereotypes of dating violence victims, especially focusing on how they affect judgments of dating violence cases. We examined if judgment of dating violence cases differed by victim typicality. The results based on 160 adults (80 females and 80 males) showed that the higher the level of victim typicality, the more seriously the offense was evaluated. In addition, the level of offense seriousness mediated the relationship between victim typicality and judgment of offender responsibility and victim blame. The higher the level of victim typicality, the more seriously the offense was evaluated, and the bigger the offender responsibility and the less the victim was blamed. Finally, we discussed policy implications of the study for preventing secondary victimization in criminal proceedings and developing education programs for jurors.

• Korean Journal of Forensic Psychology
• /
• v.11 no.3
• /
• pp.287-307
• /
• 2020

Child sexual abuse (CSA), under the age of 13, has increased over the past ten years, but research on the perceptions of perpetrators and victims have mainly focused on sexual violence against adults. Differentiating the age of the perpetrator into child, adolescent, and adult, the present study examined differences in perceptions of perpetrators and victims of child sexual abuse. The study also investigated differences by the gender of respondents, and examined the effects of Sexual Violence Myths (SVM) and Authoritarian Personality on perceptions of child sexual abuse. A total of 210 people in their 20s to 60s evaluated the degree to perpetrator blaming, perpetrator punishment, victim responsibility, and pain of the victim, and responded to the SVM scale and Authoritarian Personality scale. The correlation analysis, one-way ANOVA, independent samples t-test, and mediation analysis were conducted. The difference in the perception of perpetrator punishment by the age of the perpetrator was significant, indicating that respondents thought that adolescent perpetrators should be more severely punished than child perpetrators. Male respondents compared to female respondents were more likely to attribute the responsibility of sexual assault to the victim, to accept sexual violence myths and to be authoritarian. Sexual Violence Myths mediated the effects of the gender of respondents on the perception of victim responsibility, and Authoritarian Personality moderated these mediation effects. Finally, the limitations and implications of the study were discussed.

• Korean Journal of Forensic Psychology
• /
• v.12 no.3
• /
• pp.279-300
• /
• 2021

The study explored the association between narcissism and sexual dating violence, and how ambivalent sexism affects the relation. Additionally, this study investigated if there exists gender difference in the relations between factors of narcissism and sexual dating violence, and the mediating effects of ambivalent sexism. Based on 200 participants(100 males and 100 females), the mediation effect of ambivalent sexism on the relation between narcissism and sexual dating violence was examined. For male participants, the mediation effect of hostile sexism on the relation between narcissism and sexual dating violence was significant, whereas for female participants the mediation effect of benevolent sexism on the relation between narcissism and sexual dating violence was significant. Different patterns were evident regarding the associations between factors of narcissism and sexual dating violence. For males, the more with exhibitionism and entitlement, the more with hostile sexism, and the more with sexual dating violence. For females, the more with exhibitionism, entitlement, and self-sufficiency, the more with benevolent sexism, and the more with sexual dating violence. The study revealed that the mediation effect of ambivalent sexism between narcissism and sexual dating violence differed by gender and by factors of narcissism. Finally, preventions measures for sexual dating violence were discussed.

• Korean Journal of Forensic Psychology
• /
• v.12 no.1
• /
• pp.75-97
• /
• 2021

This study investigated whether judgments of sexual violence involving juvenile victims vary by history of victim's juvenile prostitution, victim's behavior conforming to stereotypes of an "ideal" victim, and relationships between victim and perpetrator. The study also examined the effects of participants' level of authoritarianism and rape myth acceptance on their judgments of sexual violence. A total of 335 participants(170 females, 165 males) in their 20s to 50s assessed the degree of victim blaming and perpetrator sentencing. This study examined the effects of participants' gender and age on the judgments of victim blaming and perpetrator sentencing, and the mediation effects of authoritarianism and rape myth acceptance. As a result, participants blamed the victim more and imposed a lighter sentence on the perpetrator when the juvenile victim did not conform to the image of an "ideal" victim of sexual violence as opposed to a "typical victim". They also blamed the victim more when the victim and the perpetrator met through a chat application than when the victim and the perpetrator had known each other. Male participants as opposed to female participants blamed the victim more, punished the perpetrator more lightly, and exhibited a higher level of authoritarianism and rape myth acceptance. The older the participants were, the more they blamed the victim and the higher they demonstrated rape myth acceptance. The effect of the participants' gender on the judgment of the perpetrator punishment was mediated by rape myth acceptance, and the effect of the participants' gender and age on the victim blaming was mediated by authoritarianism and rape myth acceptance.

• Journal of Korean Elementary Science Education
• /
• v.42 no.1
• /
• pp.161-177
• /
• 2023

Scientific explanation is composed of various representations such as texts, diagrams, and graphs, and each representation contributes to expanding scientific meaning by connecting similar but slightly different meanings as a 'mode'. Based on this perspective of social semiotics, we aimed to identify the characteristics of meaning formation demonstrated in students' science writing (verbal mode) and science drawing (visual mode) and to discuss the pedagogical use of multimodal representations. To that end, 18 science drawings and 18 scientific writings constructed by science-gifted elementary students on air pressure were collected. The characteristics of the drawn and written explanations were then analyzed from the affordance perspective in social semiotics. In science drawing, students showed a tendency to use the affordance of the visual mode to infer concrete changes from the particle view, such as the movement of air particles, the number of air particles, and the collision of particles. In science writing, students used the affordance of the verbal mode mainly to infer the causal relationship between the concept of air pressure and other related factors at an abstract level. Based on those results, we discuss the educational implications and provide concrete examples of how to use the unique affordances of each form to complement one another.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2021.06a
• /
• pp.25-25
• /
• 2021

점착성 유사는 비점착성 유사에 비해 1차입자의 크기가 작아 1차입자간의 점착력이 중요한 역할을 하는 유사를 말한다. 점착성 유사는 비점착성 유사에 비해 크기가 작아 입자의 전자기적 점착력의 영향을 무시할 수 없으므로 점착력으로 인해 입자들은 서로 응집하는 동시에 입자들 간의 충돌에 의하여 파괴되는 과정을 거친다. 이러한 응집과 파괴가 지속되는 일련의 과정을 응집현상이라 한다. 점착성 유사는 응집과정을 통해 일차입자보다 크기가 크며 수십 개에서 수천 개의 일차입자와 물의 덩어리인 플럭을 형성하게 된다. 흐름 내 존재하는 플럭의 응집현상에 가장 지배적인 영향을 미치는 인자로 난류 거동이 알려진 바 있다. 본 연구에서는 난류 거동에 따른 점착성 플럭의 입도분포 변화를 살펴보고자 하였으며, 점착성 유사 입도분포 모형을 개발하였다. 수치모형의 개발은 확률과정(또는 추계과정)의 개념을 바탕으로 한다. 점착성 유사의 응집현상을 구성하는 응집과정은 다양한 연구를 통해 메커니즘들이 규명된 것과 달리 파괴과정은 난류로 인해 발생하며 무작위한 것으로 여겨진다. 무작위한 플럭의 파괴과정을 확률과정으로 가정하고 매개변수 중 하나를 대수정규분포를 따르는 난수로 고려하였다. 개발된 모형의 검증은 연안지역에서 점착성 플럭의 거동을 측정한 연구결과와의 비교를 통해 수행하였으며, 흐름 유속의 연직분포와 유사 농도의 연직분포, 응집현상 이후 플럭의 평형크기와 입도분포가 모두 합리적으로 계산되는 것이 확인되었다. 더불어 모의 결과에서는 대수정규분포를 따르는 동일한 난수를 적용하였음에도 불구하고 하상으로부터 거리가 가까워짐에 따라 플럭입도분포가 단봉분포(Unimodal Distribution)와 이봉분포(Bimodal Distribution)가 모두 계산되는 것으로 나타났다. 이는 모형의 개발과정에서 플럭의 가능 최대 크기를 콜모고로브 길이규모로 제한한 것과 관련이 있다. 난류 흐름 내 존재하는 플럭의 크기가 응집현상을 통해 난류의 콜모고로브 길이규모까지 성장하는 경우, 난류의 전단응력이 급격하게 증가하여 파괴과정이 활발해지고 응집과정이 저하된다는 것은 널리 알려진 사실이다. 이러한 사실을 바탕으로 플럭의 가능최대 크기를 콜모고로브 길이규모로 제한하였으며, 하상으로부터의 거리에 따라 콜모고로브 길이규모의 변화로 인해 콜모고로브 길이규모 부근에서 하나의 최빈값이 추가로 나타나는 것으로 이해된다. 수치모의 결과로부터 얻어진 콜모고로브 길이규모와 입도분포 형태의 상관관계를 보다 정확하게 이해하기 위해 실측 자료들을 검토해 본 결과, 균질한 재료를 이용한 실험실 실험결과에서 플럭 이봉분포의 최빈값이 콜모고로브 길이규모와 일치하는 것이 확인되었다. 연안지역에서 측정을 수행한 자료들에서도 이봉분포 또는 다봉분포와 콜모고로브 길이 규모와의 상관성을 찾아볼 수 있었다.

• Journal of the Korean Geotechnical Society
• /
• v.39 no.11
• /
• pp.85-95
• /
• 2023

This study implemented intelligent compaction technology at the construction site of the AY Highway in Gyeonggi Province, with a focus on obtaining the representative intelligent compaction value, CMV. The target CMV for quality control was established through trial construction, and the validation of the compaction quality control process based on intelligent compaction was conducted. The optimal approach for determining the target CMV was confirmed to be through linear regression of the average CMV measured within a 5-m radius from the plate load testing location. Upon assessing compaction quality against the target CMV, it was observed that the quality criteria outlined in the domestic intelligent compaction standard were met. However, the criteria outlined in Austria and the United States were not satisfied. Notably, indicators related to the variability of compaction quality did not meet the specified criteria, suggesting a stringent standard compared to the observed variability of CMV, ranging from 17% to 55%. Consequently, it is recommended to conduct additional field tests to further validate the compaction quality control process based on intelligent compaction. This will aid in confirming and enhancing the appropriateness of the regulations stipulated in each standard.

• BMB Reports
• /
• v.56 no.10
• /
• pp.563-568
• /
• 2023

DNA methylation regulates gene expression and contributes to tumorigenesis in the early stages of cancer. In colorectal cancer (CRC), CpG island methylator phenotype (CIMP) is recognized as a distinct subset that is associated with specific molecular and clinical features. In this study, we investigated the genome-wide DNA methylation patterns among patients with CRC. The methylation data of 1 unmatched normal, 142 adjacent normal, and 294 tumor samples were analyzed. We identified 40,003 differentially methylated positions with 6,933 (79.8%) hypermethylated and 16,145 (51.6%) hypomethylated probes in the genic region. Hypermethylated probes were predominantly found in promoter-like regions, CpG islands, and N shore sites; hypomethylated probes were enriched in open-sea regions. CRC tumors were categorized into three CIMP subgroups, with 90 (30.6%) in the CIMP-high (CIMP-H), 115 (39.1%) in the CIMP-low (CIMP-L), and 89 (30.3%) in the non-CIMP group. The CIMP-H group was associated with microsatellite instability-high tumors, hypermethylation of MLH1, older age, and right-sided tumors. Our results showed that genome-wide methylation analyses classified patients with CRC into three subgroups according to CIMP levels, with clinical and molecular features consistent with previous data.