• Journal of Periodontal and Implant Science
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• 제51권4호
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• pp.254-263
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• 2021

Purpose: Periodontitis is associated with a dysbiosis of periodontopathic bacteria, which stimulate the interleukin (IL)-23/IL-17 axis that plays an essential role in the immunopathogenesis of this disease, leading to alveolar bone destruction through receptor activator of nuclear factor κB ligand (RANKL). IL-23 receptor mRNA (IL-23R) has been identified in periodontitis, and IL-17 receptor A mRNA (IL-17RA) and its protein have not yet been evaluated in patients with periodontitis. In this study was measure IL-23R and IL-17RA in gingival tissue (GT) from patients with generalized chronic periodontitis (GCP) and generalized aggressive periodontitis (GAP) and to explore correlations with clinical parameters. Methods: We included 16 healthy subjects (HS), 18 patients with GCP, and 14 with GAP. GT samples were collected during periodontal surgery. Both IL-23R and IL-17RA were detected by enzyme-linked immunosorbent assay. Results: The results were analyzed with Mann-Whitney U test and Spearman' rank correlation coefficients using SPSS version 25.0. We found lower IL-23R levels in patients with GCP and GAP than in HS. Contrarily, we observed higher IL-17RA levels in GCP and GAP patients than in HS. Moreover, we found negative correlations between IL-23R in GT and probing depth and clinical attachment loss (CAL). Likewise, a positive correlation of IL-17RA in GT with CAL was found. Conclusions: The results of these findings suggest that the reverse behavior between IL-23R and IL-17RA in periodontitis patients may also be involved with the activation of RANKL, which promotes alveolar bone loss.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제16권1호
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• pp.117-123
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• 2005

본 연구의 목적은 청소년들을 대상으로 문제행동증후군과 사회능력에 있어서의 성차에 대하여 조사하는 것이다. 12세에서 17세 사이의 청소년 6570명(남 2549명, 여 4021명)의 K-YSR자료와 부모 2373명(남자 청소년 1173명, 여자 청소년 1200명)의 K-CBCL자료를 분석하였다. K-YSR분석 결과, 남자 청소년은 사회적 미성숙 척도와 비행척도에서 높은 평균 점수를 보고했고, 여자 청소년은 내재화 문제와 총행동문제증후군 척도에서 뿐만 아니라 위축, 신체 증상, 우울/불안, 공격성 척도에서도 높은 평균 점수를 보고하였다. 또한 여자 청소년들은 사회성과 총 사회능력 척도에서도 높은 점수를 보고하였다. K-CBCL에서는 부모가 남자 청소년에 대해 주의집중 문제와 비행 척도에서 높은 평균 점수를 보고하고 있는 반면, 여자 청소년에 대해서는 내재화 문제 뿐 아니라 위축, 신체 증상, 우울/불안, 공격성 척도에서 높은 평균 점수를 보고하였다. 부모의 보고인 K-CBCL의 사회능력 척도에서는 성차가 발견되지 않았다. 요약하면, K-YSR과 K-CBCL 모두에서 여자 청소년들은 내재화 문제에서 일관적으로 높은 점수를 보이고 있으며, 외현화 문제에 있어서는 유의미한 성차가 발견되지 않았다. 그러나 여자 청소년의 경우 외현화문제에 해당하는 소척도 중 공격성 척도에서 높은 평균 점수를 보였다.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제16권2호
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• pp.211-218
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• 2005

연구목적 : 아동의 문제를 주소로 내원한 어머니의 우울증 관련인자를 알아보기 위함이다. 방법 : 50명의 아동과 어머니를 대상으로 지능검사를 포함한 임상 심리검사를 시행하였다. 어머니는 한국형 아동행동 조사표(Korean version of Achenbach's Child Behavior Checklist ; K-CBCL)를 선생님은 Teacher's Report Form(TRF)을 작성하였다. 어머니의 우울증 여부에 따라 두 군으로 나누어 조사하였다. 결과 : 총 50명의 어머니 중 $42\%$의 어머니가 우울장애를, $16\%$가 불안 장애를 가지고 있었다. 우울한 어머니는 아동 문제 중 K-CBCL 공격성과 외현화 문제에 높은 점수를 기록하였다. 우울한 어머니의 아동은 지능 검사에서 차례 맞추기와 바꿔쓰기에서 낮은 점수를 보였다. 선생님의 총 문제행동으로 보정을 하였을 때, 어머니의 우울증은 K-CBCL의 공격성, 외현화 문제, 총 문제 행동, 그리고 아동 지능 검사의 바꿔쓰기 항목과 관련이 있었다. 결론 : 아동의 공격적 행동, 외현화 행동, 총 문제 행동, 낮은 바꿔쓰기 점수가 어머니의 우울증과 관련이 있었다.

• 농촌의학ㆍ지역보건
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• 제34권2호
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• pp.234-243
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• 2009

본 연구는 청소년 466명을 대상으로 2008년 5월부터 6월 까지 구조화된 설문지를 이용하여 정신건강실태를 파악하여, 청소년의 정신건강증진을 위한 기초 자료를 제공하는데 목적이 있다. 성별에서 평균 차이검증을 실시한 결과, 우울/불안, 사고의 문제, 주의집중 문제, 공격성, 내재화, 총 문제행동에서 여학생이 남학생보다 유의하게 더 높은 점수를 보였으며, 학년에 따라서는 총 사회능력에서 고등학생이 중학생보다 유의하게 더 낮은 점수를 보였다. 그리고 문제행동에서는 위축에서 고등학생이 중학생보다 유의하게 더 높은 점수를 보여주었고, 사고의 문제, 공격성에서는 중학생이 고등학생 보다 유의하게 더 높은 점수를 나타냈다. 그리고 임상군의 분포는 총 사회능력에서 32.6%, 총 문제행동에서 8.6%를 나타냈으며, 문제행동별 임상군의 분포 순위는 주의집중문제, 우울/불안, 공격성, 외현화 문제, 내현화문제, 사회적 미성숙 등의 순으로 나타났다. 그리고 성별에 따른 정상군과 임상군의 차이검증에서는 사회성, 우울/불안, 주의집중 문제, 내재화, 외현화에서 남학생보다 여학생이 더 많은 임상군의 분포를 보이며 유의한 차이를, 학년에 따른 정상군과 임상군의 차이검증에서는 학업수행에서 중학생보다 고등학생이 더 많은 임상분포를 보이며 유의한 차이를 나타냈다. 이상의 연구결과 일 지역사회 청소년 정신건강 실태는 남학생보다는 여학생이 그리고 고등학교 1학년 보다는 중학교 1학년이 더 많은 정신건강의 문제를 가지고 있는 결과를 보여주었다. 그러므로 여학생과 중학교 1학년을 대상으로 한 정신건강 증진 및 예방 접근이 무엇보다도 우선되어야한다. 또한 문제행동에서 많은 임상분포를 보인 주의집중, 우울/불안, 공격성 문제를 해결 하고 예방하기 위한 중재 프로그램 개발이 요구된다.

• 아동학회지
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• 제28권6호
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• pp.155-168
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• 2007

Subjects were 134 institutionalized children(86 boys, 48 girls) and 218 non-institutionalized children(115 boys, 103 girls). Findings were that (1) institutionalized children showed lower internal locus of control than non-institutionalized children. (2) Institutionalized children with internal locus of control showed active coping behavior. Non-institutionalized children with internal locus of control showed active and social support seeking coping behavior, and non-institutional children with external locus of control showed aggressive coping behavior. (3) Regression analysis models showed that institutionalized girls were more depressed than boys; depressed institutionalized children were oriented to external locus of control and passive coping behavior. Depressed non-institutionalized children were oriented to external locus of control and passive, evasive coping behavior and showed lower active and social support seeking behavior.

• 한국생활과학회지
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• 제23권3호
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• pp.409-420
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• 2014

The purpose of this study was to explore the effects of mother-child interaction and child's social behaviors on child's peer acceptance. Participants were 108 4- to 5-year-old preschoolers(58 boys, 50 girls) and their mothers. Data were analyzed by descriptive statistics, correlation analysis and stepwise multiple regression analysis. The major findings are summarized as follows: (1) mother-child interaction are generally correlated with child's peer acceptance. And child's prosocial behavior was positively correlated with child's peer acceptance, whereas child's aggressive behavior, asocial behavior and hyperactive-distractible behavior were negatively correlated with child's peer acceptance. (2) The most influential factor on child's peer acceptance was child's experience in session, the next influential factor was child's hyperactive-distractible behavior and the last influential factor was asocial behavior.

• 한국가정과학회지
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• 제2권2호
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• pp.17-28
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• 1999

The purpose of this study was to investigate the effects of children's individual characteristic on peer acceptance. The subjects were 234 6th grade elementary school children in Kwangju, Korea. The Questionnaires were used to collect the data on peer acceptance and social behavioral trait, physical attractiveness, demographic variables and the school achievement grade assessed by their teachers. The results were as follows : 1. Peer acceptance score, school achievement grade, prosocial behavior score, appearance score and physical attractiveness tend to be above the median scores. Aggression behavior score and withdrawal score tend to below the median scores. 2. The effect of individual characteristic variables on the peer acceptance found all significantly. 3. The influence of prosocial behavior, physical attractiveness, withdrawal behavior, aggressive behavior and school achievement grade on peer acceptance were found significantly. Prosocial behavior was the most influential variable on peer acceptance.

• 경영과학
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• 제26권3호
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• pp.169-184
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• 2009

Recently, mobile telecommunication businesses contend with each other to expand their customer base by using aggressive marketing strategies. In order to determine if there strategies are effective, customer's switching behavior needs to be studied. This study identifies and analyzes direct, indirect factors that may customer switching behavior : attractiveness of alternatives, network externality, and switching cost. Results reveals that attractiveness of alternatives, network externalities have a direct impact on customer switching behavior. These two factors also have moderating effects on customer switching behavior but the switching cost does not In short, network externalities and alternatives strategically determine the success of 3.5G service. In this regard, mobile business should improve their own attractiveness of alternatives by developing specialized service in 3.5G service.

• Imaging Science in Dentistry
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• 제31권2호
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• pp.109-115
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• 2001

The ameloblastic carcinoma is an extremely rare, aggressive odontogenic neoplasm of the jaws. It is described as an ameloblastoma in which there is histologic evidence of malignancy in the primary or recurrent tumors, regardless of whether it has metastasized. We report an aggressive case of ameloblastic carcinoma of the mandible. A 68-year-old man with the complaint of the left facial swelling and intermittent pain was referred to our hospital. Serial images of panoramic radiograph, computed tomograph, and magnetic resonance imaging showed an ill-defined destructive radiolucent lesion of the left mandible. The lesion had typically aggressive behavior with extensive local destruction of bone and extended to the adjacent soft tissues. Bone scan revealed increased uptakes in the left mandibular body and ramus regions. Histological features were generally resembled with those of an ameloblastoma but with cytologic features of epithelial malignancy.

• 한국구조물진단유지관리공학회 논문집
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• 제7권2호
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• pp.159-167
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• 2003

Cracks in reinforced concrete structures reduce overall durability by allowing the penetration of water and aggressive agents, thereby accelerating the deterioration of the reinforcing steel. Highway pavement and bridge decks are especially susceptible to this type of deterioration since these structures exhibit high rates of shrinkage and are frequently exposed to aggressive environmental conditions. The objectives of this investigation included the development of experimental procedures for assessing shrinkage cracking potential of recycled aggregate concrete, the evaluation of mix composition on shrinkage cracking potential, and the development of theoretical models to simulate early-age cracking behavior. Specifically, the influences of shrinkage-reducing admixture(SRA) and recycled aggregate concrete were investigated. The shrinkage-reducing admixture substantially reduces free shrinkage and restrains shrinkage cracking while providing similar mechanical properties. A fracture mechanics modeling approach was developed to predict the behavior of a variety of restrained concrete specimens. This modeling approach was used to successfully explain experimental results from a variety of mixture compositions. The model was used to demonstrate the influence of material and structural properties on the potential for cracking.