• The Journal of Korean Institute of Communications and Information Sciences
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• v.41 no.8
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• pp.877-889
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• 2016

In this paper, we introduce the basic components of the Cognitive Radio Networks along with possible threats. Specifically, we investigate the SSDF (Spectrum Sensing Data Falsification) attack which is one of the easiest attack to carry out. Despite its simplicity, the SSDF attack needs careful attention in order to build a secure system that resists to it. The proposed scheme utilizes the Anomaly Detection technique to identify malicious users as well as their sensing reports. The simulation results shows that the proposed scheme can effectively detect erroneous sensing reports and thus result in correct detection of the active primary users.

• Journal of The Korean Society of Integrative Medicine
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• v.2 no.3
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• pp.1-7
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• 2014

Purpose : The purpose of this study was to evaluate the influence of Lowenstein Occupational Therapy Cognitive Assessment(LOTCA) and Activities of Daily Living(ADL) by CogPack program in elderly with Alzheimer's dementia. Method : The subjects of this study, elderly diagnosed with Alzheimer's dementia, 8 patients were picked up, who were agreed with this research. Cognitive training for 6 weeks, which consisted of 3 times per week, 30 min of memory, attention and performance with cogpack program. Cognitive and ADL measured by LOTCA and FIM. The SPSS Ver. 14.0 statistical program was used for data processing. The significance level for statistical inspection was set as 0.05. Result : In comparison of LOTCA was significantly correlated in the pre and post test but FIM was not significantly correlated in the pre and post test. Conclusion : Therefore, the CogPack program is useful to improve the LOTCA in elderly with Alzheimer's dementia.

• Journal of Korean Academy of Nursing
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• v.34 no.3
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• pp.495-503
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• 2004

Purpose: The purpose of this study was to compare the degree of cognitive level, nutritional status and depression in elderly according to living situations. Method: The subjects consisted of 173 elderly classifying three groups(living alone, living with spouse, living with children). Data was collected from March to June, 2003 by a structured questionnaire that included general characteristics, MMSE-K, nutritional status and depression scale. The collected data was analyzed by the SPSS program including descriptive statistics, $\chi$$^2$-test, ANCOVA, Scheffe test and Pearson Correlation Coefficient. Result: In MMSE-K, the living alone group showed suspicious dementia while the other groups were normal. The living alone group showed a high nutritional risk and all three groups showed depression. In MMSE-K, the nutritional status and depression were statistically significant by the living situation. In each group except living with spouse, MMSE-K indicated a significantly negative correlation to depression and nutritional status, while nutritional status showed a significantly positive correlation to depression. Conclusion: It is necessary to develop supportive programs for decreasing the risk of bad health in the elderly and an individual approach according to their living situation. Especially, more concern and intervention is necessary for the solitary elderly.

• Journal of Korean Academy of Nursing
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• v.14 no.2
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• pp.47-54
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• 1984

In an attempt to take Comprehensive nursing care the author tested cognitive function and psychiatric disturbance produced by normal adults. Mini-mental state and simple reaction time were tested and general health questionnaire was conducted two hundred subjects. The data were analyzed statistically and the results follow: 1. The score of mini-mental state of the elderly group was less significant than that of the younger group in the tests of cognitive dysfunction. The score of MMS of the female group, the illiteracy group less significant than that of other groups in the test of cogntive dysfunction. 2. Reaction time of the elderly group was slower than that of the younger group. Reaction time of the female group was slower than that of the male group. Reaction time of the illiteracy group was the slowest & the unskilled group was slower than that of the other groups. 3. As a result of the results of psychiatric disturbance the score of general health questionnaire of the elderly group was significantly higher than that of the younger group in the tests of psychiatric disturbance. The test of psychiatric disturbance sho-wed that the score of general health questionnaire of the female group was significantly higher than that of the male group in the tests of psychiatric disturbance. The illiteracy group was the highest in the psychiatric disturbance among other groups and the unskilled group was significantly higher than the other groups. 4. Education had higher correlation to mini-men-tat state, while age negative correlation in comparison with other variables age had higher correlation to reaction time, while education had negative correlation in comparison with other variables. Sex had low correlation in these tests.

• Korean Journal of Adult Nursing
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• v.20 no.4
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• pp.613-625
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• 2008

Purpose: The purpose of this study was to identify the effects of the tailored group exercise program on perceived health status, physical strength, depression and cognitive function in seniors. Methods: The subjects were 42 seniors of the experimental group and 28 seniors of the control group. The exercise program tailored by physical fitness was carried out for 16 weeks. The dependent variables were measured by Perceived Health Status Scale, The Senior Fitness Test, MMSE-K, and GDS-K. The collected data were analyzed by Fisher's exact test, Chi-square test and t-test, and ANCOVA using the SAS program. Results: In terms of physical strength and depression there was significant difference among groups. Perceived health status and cognitive function were not significant different among groups. Conclusion: In this study, the tailored exercise program was effective and safe for the elderly, and resulted in improving physical and psychological health status in the elderly. This demonstrated that the tailored group exercises program on the basis of the subject's fitness, played an essential role in maintaining and improving the health.

• Journal of Environmental Science International
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• v.24 no.11
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• pp.1451-1461
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• 2015

The purpose of this study is to describe how nature-based ecotourism motivation of ecotourists influences destination image and satisfaction of ecotourists. In order to achieve the above purposes, the study carried out a literature study and an empirical analysis. Based on the obtained data through the literature study, the study designed a model for the empirical study. The results of this study are as follows. First, returns to nature, knowledge. fitness and escape as ecotourism motivation of ecotourist had a positive effect on each ecotourism destination image, such as cognitive and affective image. However, effect of novelty on cognitive image for destination had not significant results. Second, ecotourism destination image, such as cognitive and affective image, had a positive effect on ecotourism satisfaction of ecotourists. The results of the article provide implications for strategies for promoting ecotourism destination and suggest some guidelines for the eco-education of tourists.

• Journal of Korean Critical Care Nursing
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• v.1 no.1
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• pp.19-31
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• 2008

Purpose: This study was conducted to exam the effects of the Abbreviated Cognitive Behavioral Therapy(ACBT) on chronic insomnia. Methods: Study was one-group interrupted time series study that involved 13 adults(mean age=51.7, aged 25-77 years) with chronic primary insomnia who visited sleep disorder clinic of S Hospital from November 2004 to October 2005. The subjects received 2-session individual ACBT with 2 week-interval($1^{st}$: 1.5- 2hrs, $2^{nd}$: 20-30min). To measure the subjective insomnia severity and sleep patterns, 3 times of insomnia severity index and sleep logs were completed(before ACBT, after ACBT, and 3-month after ACBT). The main outcomes were subjective insomnia severity and sleep patterns(sleep onset latency, waking after sleep onset, and total sleep time, sleep efficiency). The data were analyzed with SPSS 10.0 version program by Friedman test, Wilcoxon signed rank test with Bonferroni correction. Results: There were statistically significant decrease in insomnia severity index, sleep onset latency, and waking after sleep onset, and increase total sleep time and sleep efficiency. Conclusion: ACBT was effective in reducing subjective insomnia severity and improving sleep patterns. Sleep improvement was better sustained over time with ACBT.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.28 no.3
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• pp.168-173
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• 2017

Objectives: Adolescent depression is a complex disorder influenced by a variety of personal and familial factors. In this study, we compared the familial, cognitive, and behavioral characteristics of adolescents with and without diagnosed depression. Methods: Forty adolescents with depressive disorder were recruited from two psychiatric clinics, along with 46 healthy adolescents from a middle school and a high school. We then compared the participants' cognitive and behavioral characteristics and the child-rearing attitudes of their parents. Results: Compared to the healthy adolescents, the adolescents with depression exhibited lower self-esteem, higher emotional reappraisal, greater disruptive behavior, and lower attention. Furthermore, compared to the mothers of the healthy adolescents, the mothers of those with depression reported less affective, less autonomic, and more rejecting parenting attitudes towards their children. Conclusion: We found that attentional problems, negative parenting attitudes, negative self-cognition, and expressive suppression are all associated with adolescent depression. Parenting education and interventions appear to be needed to correct the negative cognitions of adolescents with depression.

• The Journal of Korean Physical Therapy
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• v.13 no.1
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• pp.107-114
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• 2001

Recently the number of elderly have been increasing at a rapid pace in Korea. Accompanying this aged society are numerous health problems. Whit this in mind health-promotion behaviors such as physical activity. good nutrition and stress management are vitally important to the elderly in reducing the risk of Health problems, maintaining health and improving the overall quality of life. Health promotion programs for the elderly must be developed. The purpose of th is study was to determine influential cognitive factors on health-promotion behaviors and the effects of previously implemented Health promotion programs. For this, previous studies were reviewed and analyzed. The results were as follows. 1. Cognitive factors on health-promotion behaviors were internal locus of control, perceived health status, self-efficacy, concerns about health, social support, attending social activities. 2. Components of health promotion programs were exercise and health education. Exercise was performed in most programs. The effects of exercise programs were improved flexibility, muscle strength. balance, cardiopulmonary function and elevated ability of daily living, perceived health status, quality of lift and a decrease depression. The results strongly suggest that complex health promotion programs should be developed. Health promotion programs need to include exercise, health education, health counseling and social activities. We have to consider cognitive factors on health-promotion behaviors.

• Science of Emotion and Sensibility
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• v.4 no.2
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• pp.89-93
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• 2001

Human arousal represents one of human emotion dimension. Its effort on human performance has been generally accepted at a invert-cup trend. h optimal range of human arousal enhances human performance However, definition of arousal is not Vet clear. Human arousal has different types depending on the causes. This paper observes different reponses based on different arousals such as cognitive arousal and physical arousal. Twenty undergraduate students participated and experienced cognitive and physical arousals. Their physiological response were analyzed and differentiated between cognitive and physical arousal. Finally, significant difference between them are not shown in autonomic responses but in central nervous responses.