• Proceedings of the Korean Society of Computer Information Conference
• /
• 2018.01a
• /
• pp.113-116
• /
• 2018

본 연구에서는 컴퓨팅 사고력 평가 도구 중 자기보고식 설문과 지필형 검사지인 비버 챌린지 간의 상관관계를 분석하고자 하였다. 두 평가 도구를 사용한 결과 간의 상관관계는 통계적으로 유의하지 않았다. 따라서 객관적인 측정을 위하여 자기보고식 설문에 대한 수정 및 보완이 필요하며, 비버 챌린지의 점수에 영향을 주는 난이도에 대한 고찰이 필요하다. 덧붙여 산출물 평가와 자기보고식 설문, 지필형 검사지 간의 상관관계를 분석할 필요가 있다.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.33 no.1C
• /
• pp.1-5
• /
• 2008

Optical code division multiple access(OCDMA) systems make the active users to share the bandwidth by simply assigning distinct optical orthogonal codeword to each active user. An optical orthogonal code(OOC) is a collection of binary sequences with good correlation properties which are important factors of determining the capacity of OCDMA systems. Recently, 2-D OOC construction method is frequently researched which is able to support more users than 1-D OOC. In this paper, a combinatorial construction of simple multi-weight 2-D OOC with autocorrelation 0 and crosscorrelation 1 is proposed and the bound on the size of these codes is derived.

• Journal of Korean Society of Transportation
• /
• v.15 no.1
• /
• pp.5-15
• /
• 1997

공간통계분석은 공간적으로 연계된 변수들간의 관계를 분석하는 통계분야이다. 일 반적으로 공간적으로 연계된 변수들간의 관계는 각 변수간의 공간적 분포정도에 따라서 영 향을 받는다. 전통적인 통계 분석의 방법은 동질의 자료발생과정에 의하여 확률적으로 축출 된 표본자료를 가정하고 있으나, 공간적인 자료는 이와 같은 동질의 자료발생과정의 가정을 부정한다. 교통류 및 교통사고 등과 같은 교통분야의 자료는 대부분 공간적인 상관관계에 의하여 축출된 이질적인 표본자료이며 따라서 공간상관관계를 동질적으로 가정한 전통적인 통계적 분석 방법은 오류를 범할 수 있다. 본 논문은 공간적인 관계를 고려한 공간자기상관 분석기법을 이용하여 고속도로상의 교통사고에 관하여 분석하였다. 분석의 결과에 의하면 4 개 고속도로 중 경인고속도로를 제외한 3개의 고속도로상의 교통사고건수는 통계적으로 현 저한 양의 공간적 상관관계가 있음을 알 수 있었다. 이에 따라 공간적 상관관계를 고려한 교통사고분석을 위하여 종속변수로 단위구간별 교통사고건수를 그리고 설명변수로서는 단위 구간별 교통량, I.C. 유무 및 화물차량비율을 이용하여 공간 자기회귀분석을 시도하였다. 분 석의 분석에서는 구간별 교통량과 화물차량의 비율이 호남/남해 고속도로의 경우에는 구간 별 교통량과 I.C. 유무가 통계적으로 유의한 것으로 분석되었다.

• Review of KIISC
• /
• v.2 no.3
• /
• pp.41-49
• /
• 1992

레이다 시스템, ranging 시스템, 확산 대역 통신 (spread spectrum communication) 시스템, 그리고 요즈음 각광받고 있는 코드분할방식 다중통신 (CDMA com-munication) 시스템에서는 주지하다시피 상관성(correlation) 이 좋은 수열(sequence)들위 사용이 필수 불가결하다. 수열의 상관성은 그 수열 자신의 상관성이냐 다른 수열간의 상관성이냐에 따라 자기상관관계(crosscorrelation)로 나누어 생각할 수 있고 수열의 주기성의 유무에 따라 주기적 상관관계(Periodic correlation)와 비주기적 상관관계(aperiodic correla-tion)로 나누어 볼 수 있다. 여기서 수열의 상관성이 좋다는 말은 정규화된 수열의 자기상관계수(autocorrelation coefficient)와 수열 간의 교차상관 계수(crosscorrelation coefficient)의 최대 크기가 수열의 길이에 비해 상대적으로 작은 값을 갖는다는 것을 의미한다. 본 논문에서는 주기성을 갖는 이진수열군의 하나인 bent수열과 이 bent수열을 구성하는데 기본이 되는 bent함수를 중심으로 주기적 상관성이 우수한 여러 수열군에 대해 알아보고자 한다.

• The Journal of the Korea Contents Association
• /
• v.17 no.5
• /
• pp.677-685
• /
• 2017

This study was done to explore the relationship among mental health, self efficacy, happiness, suicidal ideation and related factors. Data collection from May 1, 2015 August 31 were enrolled in U-city. The questionnaire was filled out by 467 citizen in cities of Ulsan. Mental health was negatively correlated with self efficacy and was positively correlated with suicidal ideation. Self efficacy was positively correlated with happiness and negatively correlated with suicidal ideation. Also, happiness was negatively correlated with suicidal ideation of elementary student. Among the general characteristics, factors affecting suicidal ideation was marietal status, preferred mental health, and happiness significantly accounted for 43.3% of the variance for suicidal ideation. The most significant factor influencing suicidal ideation was mental health.

• The Journal of the Korea Contents Association
• /
• v.21 no.1
• /
• pp.579-589
• /
• 2021

The study is to verify the mediating effect of self-compassion in the relationship between abandonment anxiety and relationship addiction. To this end, a questionnaire survey was conducted on 250 men and women in early adulthood, using the scales of abandonment anxiety, self-compassion, and relationship addiction, of which 237 were used for the final analysis. Descriptive statistics and correlation analysis were performed using the SPSS 21.0 program, and mediating effects were confirmed using the PROCESS macro. The results of the study are as follows. First, abandonment anxiety showed negative correlation with self-compassion, and positive correlation with relationship addiction. Self-compassion showed negative correlation with relationship addiction. Second, in the relationship between abandonment anxiety and relationship addiction, self-compassion showed a partial mediating effect. Through this study, the relationship between abandonment anxiety and relationship addiction and the effectiveness of self-compassion to manage it were confirmed. Based on the results of this study, the significance and limitations of this study and suggestions for subsequent studies were presented.

• The Journal of the Korea Contents Association
• /
• v.17 no.2
• /
• pp.71-81
• /
• 2017

This study is to explore the relationship among self assertiveness, self efficacy, school adaptation and related factors. Data collection from July 11, 2015 July 20 were enrolled in two elementary school. The questionnaire was filled out by 905 elementary students from 3rd to 6th grade in cities of Busan and Ulsan. Self assertiveness for the elementary students was positively correlated with self efficacy and school adaptation. Also, self efficacy was positively correlated with school adaptation of elementary student. Among the general characteristics, factors affecting school adaptation were student-teacher's relationship, school grade, gender, friendship, confidence, self-control, preferred task difficulty, body language and contents of expression significantly accounted for 57.5%. The most significant factor influencing school adaptation was confidence.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.17 no.4
• /
• pp.180-187
• /
• 2016

This study was performed to identify the relationship between the SNS addiction tendency, self-assertiveness and interpersonal problems in college students. The subjects consisted of 198 students in Korea. The data were collected using a self-report questionnaire from September 10 to 12, 2013. The data were analyzed by frequency, t-test, ANOVA, and Pearson's correlation using SPSS for Windows version 22. The SNS addiction tendency was significantly negatively correlated with self-assertiveness(r=-.148, p<.05) and significantly positively correlated with interpersonal problems (r=.434, p<.001). Self-assertiveness was significantly negatively correlated with interpersonal problems (r=-.459, p<.001). The higher the SNS addiction tendency, the lower the self-assertiveness and the higher the interpersonal problems. The lower the self-assertiveness, the higher the interpersonal problems. Therefore, to decrease the SNS addiction tendency, increase the self-assertiveness and decrease the interpersonal problems, it is necessary to develop and test program.

• The Journal of Korean Academy of Sensory Integration
• /
• v.13 no.2
• /
• pp.43-51
• /
• 2015

Objective : The purpose of this study was to investigate the correlation between smartphone addiction, sensory processing features and self-efficacy in college students. Methods : From June to August in 2015, a hundred eighty three healthy college students were completed the questionnaire for smartphone addiction (S-scale), sensory processing feature (Adolescent/ Adult Sensory Profile), and self-efficacy (Self-Efficacy Scale) and correlation analyses were applied. Results : There were significant differences on sensory registration and sensory sensitivity in sensory processing features between the addiction group and the non-addiction group. Significant correlations were found between smartphone addiction and sensory seeking, and smartphone addiction and self-efficacy. Conclusion : This study showed smartphone addiction had relationships with high sensory seeking and low self-efficacy. Thus, more studies and interventions focused on preventing smartphone addiction are required for college students.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.6 no.4
• /
• pp.539-544
• /
• 2011

Balanced binary sequences of period $2^n-1(n{\geq}1)$ having the two-valued autocorrelation function have many applications in spread-spectrum communications system. In this paper we propose new nonlinear binary sequences which are constructed from Legendre sequences with the same cross-correlation as the sequences proposed by Cho. These sequences include the m-sequences, GMW sequences, Kasami sequences and No sequences which are described in terms of the trace function over a finite field. Also the proposed sequences have more low cross-correlation distribution than the quadratic form sequences proposed by Klapper.