• Annals of Clinical Neurophysiology
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• v.13 no.2
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• pp.80-86
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• 2011

Background: A dry-type electrode is an alternative to the conventional wet-type electrode, because it can be applied without any skin preparation, such as a conductive electrolyte. However, because a dry-type electrode without electrolyte has high electrode-to-skin impedance, an impedance-converting amplifier is typically used to minimize the distortion of the bioelectric signal. In this study, we developed an active dry electroencephalography (EEG) electrode using an impedance converter, and compared its performance with a conventional Ag/AgCl EEG electrode. Methods: We developed an active dry electrode with an impedance converter using a chopper-stabilized operational amplifier. Two electrodes, a conventional Ag/AgCl electrode and our active electrode, were used to acquire EEG signals simultaneously, and the performance was tested in terms of (1) the electrode impedance, (2) raw data quality, and (3) the robustness of any artifacts. Results: The contact impedance of the developed electrode was lower than that of the Ag/AgCl electrode ($0.3{\pm}0.1$ vs. $2.7{\pm}0.7\;k{\Omega}$, respectively). The EEG signal and power spectrum were similar for both electrodes. Additionally, our electrode had a lower 60-Hz component than the Ag/AgCl electrode (16.64 vs. 24.33 dB, respectively). The change in potential of the developed electrode with a physical stimulus was lower than for the Ag/AgCl electrode ($58.7{\pm}30.6$ vs. $81.0{\pm}19.1\;{\mu}V$, respectively), and the difference was close to statistical significance (P=0.07). Conclusions: Our electrode can be used to replace Ag/AgCl electrodes, when EEG recording is emergently required, such as in emergency rooms or in intensive care units.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.2
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• pp.1000-1009
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• 2014

This study selected 582 senior citizens who used 6 senior welfare centers in 7 districts, Daegu and analyzed questionnaires for them from January 9 through June 5, 2013 in order to look into their subjective oral health, social efficacy and quality of life according to their subjective cognition of oral health and their quality of life related to oral health according to sociodemographic characteristics and drew the following conclusions: Sex was statistically significant in toothache and xerostomia; age, in oral health, dysmasesis, toothache, periodontal complications and xerostomia; the level of education, in oral health, dysmasesis, toothache and periodontal complications; and the number of family members living together, in dysmasesis, toothache, periodontal complications, xerostomia and halitosis. Their responses to the question about their social efficacy according to oral health included: 'My oral health is not good' 3.11 points; and 'My jaw crackles or hurts' 1.99 points. In social efficacy according to their cognition of oral health, their health was 2.05 points while in the quality of life, their health was 3.41 points. In the scores of the quality of life related to oral health, for their health, functional limitation was 2.13 points; physical pain, 2.53; psychological discomfort, 2.17; physical limitation, 2.31; degradation of psychological ability, 2.06; degradation of social ability, 1.81; and social disadvantage, 1.99. In sum, it is judged that senior citizens' quality of life as well as their oral health will be enhanced when active seeking for plans to prevent the progress of oral diseases is sufficiently considered through continuously providing oral health education for the promotion of geriatric oral health and developing preventive programs.

• Journal of the Korean Applied Science and Technology
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• v.35 no.4
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• pp.1456-1471
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• 2018

This article discusses the nutritional requirements, reviews senior or geriatric dog nutritional evaluation, and then addresses some common nutrition-related problems in older dogs. The purpose of this study was to investigate the Physiologic change associated with aging, essential nutrients and their diseases in senior or geriatric dog subjects. According to a 2002 market research, 30% to 40% of dogs raisedin the United States are 7 years of age. In Europe the number of dogs considered to be "senior or geriatric" (>7 years of age) increased by approximately 50% between 1983 and 1995. A 2012 e-mail survey of 50,347 respondents revealed that 33.2% of dogs were 6 to 10 years of age and 14.7% were older than 11 years in the United States. The average life expectancy of dogs raised in the home is affected by health care, aging and nutrition.And, the aging process is influenced by breed size, genetics, nutrition, environment, and other factors. Although many pets remain active and youthful well into their teens, most dogs start to slow down and may show signs of aging beginning as early as 5 or 6 years of age. Improvements in the control of various diseases and in the nutrition of dogs have resulted in a gradual increase in the average lifespan of companion dogs. Nutritional goals for aging dogs include supporting health and vitality, preventing the onset or slowing the progression of age-related health disorders, and enhancing the dog's quality of life and, if possible, life expectancy. Aging brings with its physiologicchanges. Some changes are obvious, such as whitening of hair, a general decline in body and coat condition, and failing senses including sight and hearing. Other changes are less obvious, however, and these include alterations in the physiology of the digestive tract, immune system, kidneys, and other organs. Nutritional requirements can change with age. In addition, many diseases common in older dogs may be nutrient-sensitive, meaning that diet can play an important role in the management of the condition.

• Journal of the Korean Society of Costume
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• v.62 no.5
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• pp.31-43
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• 2012

The purposes of this study were to investigate the differences of post-purchase satisfaction, brand loyalty, and repurchase intention of SPA clothing brand according to lifestyles, and to disclose how lifestyles, post-purchase satisfaction, and brand loyalty influence the repurchase intention. The research method was a survey method using questionnaires. The subjects were 304 female college students residing in Seoul metropolitan area. The lifestyles were classified into six factors including pursuit of challenges, proactive interpersonal relationship, interest in sports, self-centeredness, interest in IT, and achievement orientation. Three female groups were derived by cluster analysis of the 6 lifestyle factors: active-activity type, passive-activity type, and achievement-pursuit type. Brand loyalty was classified into two factors including continuing loyalty and convenient loyalty. First, the active-activity group showed higher convenient loyalty than the other groups. The achievement-pursuit group showed higher post-purchase satisfaction than the other groups in appearance of clothing, while the passive-activity group showed lower satisfaction in every factor, in particular, its price satisfaction was very low. Second, senior students showed higher continuing loyalty than freshmen, sophomores, and juniors. Students with more clothing expenses showed higher continuing loyalty as well as convenient loyalty than those with less clothing expenses. Their price satisfaction with SPA clothing brand as well as repurchase intention was higher. Third, repurchase intention was influenced by brand loyalty the most, and the next in the order by satisfaction level with brand, satisfaction with price, satisfaction level with appearance, and proactive interpersonal relationship. The brand loyalty was influenced by satisfaction level with price the most, and the next by satisfaction level with appearance.

• The Journal of the Korea Contents Association
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• v.14 no.6
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• pp.319-327
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• 2014

The purpose of this study was to examine the degree of loneliness and suicidal ideation and the difference of them according to character type in the elderly. The study involved 149 the elderly, 65 years and over, attending community senior centers and social welfare centers. Data were collected from May to June, 2013 using the structured questionnaire. According to the findings, the means of loneliness and suicidal ideation were 2.0(${\pm}0.5$) and 1.5(${\pm}0.6$) respectively and they were below the median. In character type, percentage of the active integrated coper was 67.1% and next was the dependent passive type, the self-negating undercoper, and the failing overcoper. Loneliness and suicidal ideation of the active integrated coper were lower than them of the failing overcoper and the self-negating undercoper in elderly. There was positive correlation between loneliness and suicidal ideation. It is meaningful that the study results will be provided for understanding of elderly' mental health. Based on the results, the differentiated intervention considered of character type should be developed and provided for decreasing the loneliness and suicidal ideation in elderly.

• The Journal of the Korea institute of electronic communication sciences
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• v.15 no.6
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• pp.1223-1230
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• 2020

Due to the aging of the population, the number of the elderly is increasing, and the nuclear family is rapidly progressing. Today's AI speakers respond to user's commands rather than conversations that occur on a daily basis. If the elderly living alone do not talk first, the usability of the AI speaker will decrease. In this paper, it describes the development of AI speakers for active interaction tailored to the aged. This speaker can identify the movements of the elderly who live alone and their surroundings, actively speak to them, and display emotional expressions appropriate to the content of the conversation. Through this, users will be able to anthropomorphize AI speakers, so they can feel familiarity and emotional conversation is expected to play a positive role in easing their loneliness.

• Journal of the Korea Convergence Society
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• v.13 no.5
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• pp.229-236
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• 2022

The goal of this research is to understand the extent to which active seniors' mobile app usage level affects their lifestyle and life satisfaction. For this, we surveyed for 15 days in early December 2021 targeting about 150 users nationwide. As the questionnaire content, the independent variable was "mobile app usage level", the parameter was "lifestyle", and the dependent variable was "life satisfaction". As a result of empirical analysis, reliability and exploratory factors between each variable were verified, and it was confirmed that internal consistency was secured. It was investigated that the concentration validity of each item was generally well confirmed. As a result of hypothesis testing by the structural equation, 'App usage level ⇨ Lifestyle' was 0.244, 'Lifestyle ⇨ Life satisfaction' 0.707, and 'App usage level ⇨ Life satisfaction 0.141' was adopted. This study shows that the higher the level of mobile app usage of active seniors, the higher the lifestyle. Also, the better the lifestyle, the better the quality of life. It is analyzed that life satisfaction will improve as the level of mobile app use increases. Therefore, in order to improve life satisfaction, it seems necessary to increase the level of app use and lifestyle.

• Knowledge Management Research
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• v.11 no.1
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• pp.129-146
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• 2010

As knowledge has become the most important means of production for a company to survive in a "knowledge-based society", knowledge management has become the key issue in the corporate sector. Despite its growing significance, there are limited numbers of research that describe how companies actually develop, share and practice their knowledge. From this perspective, this study used a qualitative approach to explore on the actual process of knowledge management implementation. In-depth interviews with eleven senior managers, who were working at S global corporation, were conducted. The results show that there are differences between how the participants perceive and how they actually perform in managing knowledge. While the participants tend to conceptualize knowledge management as building a technical system, their performance has shown that knowledge has been developed and shared through active interaction among the members in the company. The factors that impede knowledge management were caused by the individualized job assignment and inapplicable exercises that result in obscuring information flow and utilizing inadequate and low quality of knowledge. The findings of this study imply that knowledge management is not a matter of formality but a paradigm that assures for the flow and share of knowledge.

• Journal of Korean society of Dental Hygiene
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• v.15 no.3
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• pp.371-377
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• 2015

Objectives: The purpose of the study was to investigate the relation between learning strategy and academic achievement in the dental hygiene students. Methods: A self-reported questionnaire was completed by 207 dental hygiene students in Gyeongnam from April 1 to 30, 2014. The questionnaire consisted fo 51 questions of learning strategy and 1 question of academic achievement. The data were analyzed using SPSS 17.0 program for descriptive analyses, t-test, Pearson correlation and multiple regressing analysis. Results: The organized strategy and learning time management had a significantly positive influence on high scores in the junior and senior students. Learning strategie(r=0.419) and cognitive strategies(r=0.343), metacognitive strategies(r=0.239), resource management strategies(r=0.415) had significantly positive correlation to academic achievement. Cognitive strategy of learning strategies(p<0.05) and resource management strategies(p<0.001) had a positive effect on higher academic achievement. Conclusions: The learning strategies will provide the dental hygiene students with active participations.

• Women's Health Nursing
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• v.12 no.4
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• pp.326-337
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• 2006

Purpose: This study was done to apply a PBL module for students' practice in maternity nursing. Method: Two PBL module scenarios were made for clinical cases in antepartum, intrapartum, and postpartum nursing care. A total of 70 senior nursing students of S university were enrolled in this module for their scheduled 3 weeks of practice. A structured questionnaire and subjective statements were collected for evaluation. Result: The students' perceptions of PBL were found to be effective in encouraging motivation and interest in studying, absorbing practical knowledge better, and learning through interaction with tutors. They became more confident, active, and positive throughout the PBL experiences while a lack of time for learning was a limitation. Conclusion: PBL is considered a method that can strengthen nursing students' abilities to adjust to clinical situations in maternity areas. It is recommended to expand PBL in nursing practice courses and develop various scenarios and qualified tutors.