Differences in Self-reported and Peer nominated Aggression Groups in School Adjustment and Psychological Characteristics

The purpose of this research was to compare the distribution of aggressiveness levels in elementary, middle, and high school students and to explore whether there are differences in school adjustment, positive psychology, and negative psychology based on aggressiveness level groups. For this research purpose, three research questions were addressed. First, what is the distribution of aggressiveness level in elementary, middle, and high school students? Second, are there any differences in school adjustment, positive psychology, and negative psychology among school levels? Third, are there any interaction effects of aggressiveness level and school levels on school adjustment, positive psychology, and negative psychology? In this research study, data of 3179 participants was derived from 2017 ClassNet program data base. The results of this study are as follows: First, peer-nominated aggressive group and high aggressive group were significantly reduced in high school compared to elementary and middle school. Second, self-reported aggressive students perceived themselves negatively and had difficulties in school adjustment compared to non-aggressive students or peer-nomination aggressive students. Lastly, the results of the interaction analysis between aggressiveness level and school level showed an interaction effect in behavioral participation, morality, empathy, self-control, and negative emotion.이 연구의 목적은 자기보고와 또래지명을 토대로 초, 중, 고등학생의 공격성 수준별 유형 분포를 비교하고, 유형에 따른 학교적응, 긍정 및 부정심리에 차이가 있는지를 탐색하는 것이다. 연구문제는 첫째, 초, 중, 고등학생의 공격성 수준별 유형분포는 어떠한가? 둘째, 학교급별로 공격성 수준별 유형에 따른 학교적응, 긍정 및 부정심리에는 차이가 있는가? 셋째, 학교적응, 긍정 및 부정심리에 대한 공격성 수준별 유형과 학교급의 상호작용 효과가 있는가? 이다. 2017년도에 클래스넷 프로그램에 포함된 초, 중, 고등학교 학생 3,179명의 데이터를 분석하였고, 주요 연구결과는 다음과 같다. 첫째, 또래지명 공격성집단과 높은 공격성집단의 비율이 초등학교와 중학교에 비해 고등학교에서 감소하였다. 반면 자기보고에 의해 공격적이라고 확인된 집단 비율은 중·고등학교에서 오히려 증가하였다. 둘째, 자신을 스스로 공격적이라고 생각하는 학생들이 비공격성집단이나 또래지명 공격성집단에 비해 대체로 자신에 대해 부정적으로 인식하고 학교적응에도 문제가 있는 것으로 나타났다. 셋째, 공격성 수준별 집단유형과 학교급의 상호작용분석결과, 행동적 참여, 도덕성,공감, 자기조절, 부정정서에서 상호작용효과가 나타났다.이 논문은 2015년 대한민국 교육부와 한국연구재단의 지원을 받아 수행된 연구임(NRF-2015S1A5A2A03049911

Numerical solutions of nonseparable elliptic equations using fast poisson solvers

We study an iterative method for the numerical solution of self-adjoint, non- separable elliptic equations in two dimensions. Although there exist many fast methods to solve separable elliptic problems, it is not easy to develop such a method for nonseparable cases. Therefore, we try to get the solution of nonseparable equation iteratively from the solutions of a sequence of Poisson equations whose solutions could be computed efficiently. A Chebyshev expansion technique has been applied to solve Poisson equations numerically. The numerical example, show that the iterative method converges for variety class of problems.;2차원에서 Self-adjoint하고 nonseparable인 타원 방정식의 수치적 해를 얻기 위한 반복적 방법을 공부한다. 비록 separable한 타원 문제들을 풀기 위한 많은 빠른 방법들이 존재하지만 nonseparable인 경우의 문제를 풀기는 어렵다. 따라서 효율적으로 계산할 수 있는 Poisson 방정식들의 수열의 해로부터 반복적으로 nonseparable한 방정식의 해를 얻는 방법을 시도해 본다. Chebyshev 방법이 Poisson 방정식들을 수치적으로 풀기 위해 사용되었고, 수치적 예에서는 반복적 방법으로 다양한 종류의 문제들이 수렴함을 보인다.Contents = ⅰ ABSTRACT = ⅱ 1 INTRODUCTION = 1 2 POISSON SOLVERS = 2 2.1 Finite Difference Method = 2 2.2 Finite Element Method = 5 2.3 Spectral Method = 8 2.4 Chebyshev Method = 10 3 DERIVATION OF THE RECURSIVE SERIES = 14 4 NUMERICAL RESULTS = 20 References = 26 논문초록 = 2

Expression of HuR in the Head and Neck Squamous Cell Carcinoma

The human ELAV(embryonic lethal abnormal vision)-like protein HuR stabilizes a certain group of cellular mRNAs that contain AU-rich elements in their 3'-untranslated region. To test the significance of HuR in carcinogenesis of head and neck squamous cell carcinomas(HNSCCs), we have investigated HuR expression from 32 benign epithelial lesions, 14 premalignant epithelial lesions and 80 HNSCCs. There were two different staining patterns of HuR in HNSCCs: nuclear expression was seen in 78.7% (63 of 80) of cases; and an additional cytoplasmic expression was seen in 28.7%(23 of 80) of cases. Nuclear expression of HuR was significantly increased in premalignant lesions and HNSCCs, whereas increased cytoplasmic expression of HuR was only observed in HNSCCs. Cytoplasmic HuR expression was significantly increased in patients of HNSCC younger than 60 years. Although there was no significant correlation between anatomic sites of HNSCCs and HuR expression, cytoplasmic HuR expression was highly increased in HNSCCs of larynx. There was no significant correlation between HuR expression and other clinicopathological parameters such as histological type, tumor size, or nodal status. In conclusion, this study suggests that overexpression of HuR in HNSCCs may be part of a regulatory pathway that controls the mRNA stability of several important targets in carcinogenesis of HNSCCs.N