• 성인간호학회지
• /
• 제24권2호
• /
• pp.171-182
• /
• 2012

Purpose: This study aimed to identify depression and its predictors among Korean community-dwelling elderly with mild cognitive impairment. Methods: Secondary data analyses of the data collected by the "Study on tailored integration program for reinforcing cognitive and physical function of the frail elderly. The study used data from one-to-one interviews using structured questionnaires. The subjects were 346 community-dwelling elderly who visited a healthcare center in Seoul, Korea. A descriptive correlational study design was utilized to explore depression and its predictors including physical factors and psychosocial factors among the elderly with mild cognitive impairment. Data were analyzed using t-test, Pearson's correlation, and hierarchical regression. Results: Mean score of depression was within normal limit $11.61{\pm}6.69$. Somatic symptoms, negative life events (severity), social support were shown as significant predictors of depression. The most influential predictor for depression was somatic symptoms (${\beta}$=.340, $p$ <.001). Conclusion: To prevent and relieve depression in the elderly with mild cognitive impairment, nursing intervention strategies which consider well-balanced physical and psychosocial aspects are needed. In particular, a specific nursing intervention strategy is required to improve physical health of the elderly with mild cognitive impairment.

• 정보과학회 논문지
• /
• 제45권3호
• /
• pp.234-241
• /
• 2018

데이터 분석 영역에 있어 게이머의 유형을 분류하거나 게이머의 특성을 분석하는 연구는 데이터 분석 연구자들이 많은 관심을 가지는 분야 중 하나이다. 과거부터 현재까지 게이머 유형화나 게이머 분석에 대해 많은 연구가 진행되어 왔다. 하지만, 대부분의 연구는 설문조사나 생체신호를 이용하고 있는데, 이는 많은 데이터를 얻기 힘들어 실용적이지 못한다. 또는 게임로그를 이용하더라도 단순히 통계적인 수치만을 추출하여 게이머를 유형화하고 분석하고 있어 게이머의 심리분석에 어려움이 있다. 하지만 기본적인 게임 로그로부터 게이머의 인지심리정보를 추출할 수 있다면, 게이머 분석을 보다 직관적이고 손쉽게 할 수 있다. 본 논문에서는 모바일 Role Playing Game(RPG) 게임인 크레이지 드래곤의 게임로그를 이용하여 게이머의 행동과 심리정보를 나타내는 8개의 인지심리속성을 추출하였다. 그 후, 이를 기반으로 게이머의 유형을 분류하였으며, 각 유형별 특징을 추출한 인지심리속성으로 분석하였다. 그 결과, 대부분의 게이머가 1~2가지 유형과 높은 연관성을 가지고 있는 것으로 확인되었다.

• 한국수학교육학회지시리즈C:초등수학교육
• /
• 제20권4호
• /
• pp.305-319
• /
• 2017

삼각형 높이를 찾는 과정에서 눈 움직임 데이터를 통해 학생들의 삼각형 높이에 대한 이해와 그에 대한 삼각형 유형별, 배치별 인지부하 알아보고자 하였다. 6학년 26명 학생들을 대상으로 콘텐츠를 활용한 수업을 진행하고, 사전 사후검사를 실시하였다. 그 결과 삼각형 높이에 대한 삼각형 유형별, 배치별 문항에서 사전 검사에 대해 사후검사에서 정답률이 크게 상승하였으며, 아울러 각 문항별 AOI(Area of Interest)에서 시선 데이터의 빈도(FC)와 머무름(FD)이 사후검사에서 더 적게 나타났다. 주관적 인지부하는 밑변이 지면에 평행한 삼각형 보다는 회전된 삼각형 배치에서 더 높게 나타났으며, 시선 추적 데이터에서는 직각삼각형과 예각삼각형의 회전 배치된 쪽에서 더 많은 빈도와 더 많은 머무름이 감지되었다. 이를 통해 시선추적 기술은 교수설계의 피드백을 위한 학생들의 인지적 부하의 객관적인 측정을 제공할 수 있음을 알 수 있었다.

• 한국과학교육학회지
• /
• 제20권4호
• /
• pp.634-641
• /
• 2000

본 연구에서는 변칙 사례를 통하여 '밀폐된 용기속에서 양초 연소 후 수면이 상승하는 원인'을 학습하는 과정에서, 인지 갈등 유발과 개념의 변화 및 파지 정도를 학생들의 성과 나이에 따라 비교하였다. 변칙 사례에 대한 7가지 반응 유형을 '초기 이론에 대한 신념 변화'에 따라 4단계로 서열화하였다. 나이에 따른 차이를 비교한 결과, 나이가 많은 학생들은 어린 학생들에 비해 인지 갈등 유발과 개념의 변화 및 파지가 효과적이었다. 그러나 인지 갈등 유발 정도와 개념의 변화 및 파지 사이에는 상관이 유의미하지 않았다. Mann-Whitney U 검증 결과, 인지 갈등유발과 개념의 변화 및 파지에 있어서 성에 따른 차이는 발견되지 않았다.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제8권2호
• /
• pp.371-388
• /
• 2014

Cognitive Radio (CR) has been recently proposed as a promising technology to remedy the problems of spectrum scarcity and spectrum underutilization by enabling unlicensed users to opportunistically utilize temporally unused licensed spectrums in a cautious manner. In Cognitive Radio Ad Hoc Networks (CRAHNs), data routing is one of the most challenging tasks since the channel availability and node mobility are unpredictable. Moreover, the network performance is severely degraded due to large numbers of path failures. In this paper, we propose the Fault-Tolerant Cognitive Ad-hoc Routing Protocol (FTCARP) to provide fast and efficient route recovery in presence of path failures during data delivery in CRAHNs. The protocol exploits the joint path and spectrum diversity to offer reliable communication and efficient spectrum usage over the networks. In the proposed protocol, a backup path is utilized in case a failure occurs over a primary transmission route. Different cause of a path failure will be handled by different route recovery mechanism. The protocol performance is compared with that of the Dual Diversity Cognitive Ad-hoc Routing Protocol (D2CARP). The simulation results obviously prove that FTCARP outperforms D2CARP in terms of throughput, packet loss, end-to-end delay and jitter in the high path-failure rate CRAHNs.

• Child Health Nursing Research
• /
• 제13권1호
• /
• pp.13-20
• /
• 2007

Purpose: This investigation examined a model to predict body mass index in order to prevent later development of obesity among adolescents. The hypothesized model was developed based on the principle of Social Cognitive Theory that social influences predict perceptions of cognition as well as behavior. Method: The 5,770 adolescents, aged 14-18 who participated in this study came from 11 separate school districts in Busan and Kyungnam province of South Korea. The adolescent surveys were administered in a group setting at the participating school. Of the 5770 surveys, adolescents with more than 10 percent missing data in the entire survey were excluded. The final sample contained 4,527 cases. The adolescents were included 2,250 (49.7%) males and 2,277 (50.3%) females. Data was analyzed Pearson correlation coefficients using SPSS 12 program and structural equation model (SEM) using Maximum Likelihood estimation was employed using Amos 5.0. Results: Social support directly affects cognitive determinants. Cognitive determinants directly affect behavior determinants which directly affect BMI. Cognitive and behavioral factors mediated the relationship between social support and BMI (GFI= 0.984, CFI= 0.974, RMSEA=0.031). Conclusion: Social levels should be supportive to help adolescents have healthier behaviors. This support can be accomplished by providing frequent support to establish positive cognitive factors as the foundation of the solution to prevent overweight and obesity.

• 아동학회지
• /
• 제36권6호
• /
• pp.1-21
• /
• 2015

This study was aimed at examining the paths through which family socioeconomic status as indicated by family income and parental education influenced preschool-aged children's socioemotional and cognitive development through the mediating role of parental warmth and the home learning environment. The study made use of data from 1,080 families who participated in the 5th wave of the Panel Study on Korean Children, when their children were approximately 4 years of age. Structural equation modeling analysis revealed that the models, including both parental warmth and the home learning environment did not fit the data well. The effects of warmth on social competence and cognitive development were not statistically significant. The modified models, using the home learning environment as a mediator between family SES and child's developmental outcomes showed that higher level of family income and parental education predicted a more cognitively stimulating home environment, which in turn, predicted a child's greater levels of social competence and positive cognitive development. The social competence of preschool-aged children again significantly predicted their cognitive development. The mediating effects of the home learning environment were statistically supported.

• 지역사회간호학회지
• /
• 제30권4호
• /
• pp.508-517
• /
• 2019

Purpose: The aim of this study was to identify the participation rate of the National Health Screening Program (NHSP) and its influencing factors by cognitive function level in Korean older adults. Methods: This study was a secondary analysis using data from the survey of the Korean Longitudinal Study of Aging in 2016. The data were analyzed using 𝑥² test and multiple logistic regression. Results: The participation rates of the NHSP in the mild cognitive impairment group (79.6%) and the suspected dementia group (58.0%) were lower than the normal cognitive function group (88.1%). The factors influencing NHSP varied by cognitive function level. Especially, in the suspected dementia group, higher participation rates of the NHSP were associated with living in rural areas, enrollment in private health insurance, no depressive symptoms, participation in social activities, and no living with children. Depression and participation in social activities influenced participation in NHSP in all groups. Conclusion: This study suggests that interventions differentiated by cognitive function level are important for increasing the participation in the health screening.

• 지역사회간호학회지
• /
• 제24권4호
• /
• pp.427-437
• /
• 2013

Purpose: This study was conducted to test effects of a cognition activation program on ADL, cognitive functions, depression, and QOL in the institutionalized elderly. Methods: The subjects were 40 elders who were admitted to a nursing home, with 20 of them in the experimental group and the other 20 in the control group. Data were collected from September 1 to December 17, 2012. The experimental group participated in a 12 week intervention program. ADL, cognitive functions, depression, and QOL were measured before and after the intervention. Data were analyzed by t-test and regression analysis of the SPSS and AMOS programs. Results: ADL (t=2.468, p=.017), depression (t=-2.625, p=012), and QOL (t=2.428, p=.020) were more significantly improved in the experimental group than in the control group, but there were no statistical differences in cognitive function between the two groups. Cognitive functions had positive effects on ADL (CR=-2.263, p=.024) and depression affected QOL (CR=-7.248, p<.001). Conclusion: The intervention program had positive effects on ADL, depression, and QOL except cognition. Cognitive functions of elders dramatically decrease after age 85, and it takes too much time to improve it. Therefore the program for the improvement of cognitive functions should be provided as early as possible.

• 아동학회지
• /
• 제26권5호
• /
• pp.379-389
• /
• 2005

This study examined the negative cognitive regulation's mediating role between affectionate relationship with children's mother and loneliness. The subjects were 491 5th and 6th grade school children in Seoul and $Ky\breve{o}nggi$. Data were analyzed by Pearson's correlation and regression. Results showed that affectionate relationship with children's mother was positively related to negative cognitive regulation. Affectionate relationship with children's mother and negative cognitive regulation was negatively related to loneliness. The principal finding was that negative cognitive regulation had mediating role between affectionate relationship with children's mother and loneliness in boys. But negative cognitive regulation didn't have mediating role between affectionate relationship with children's mother and loneliness in girls.