• Journal of Information Processing Systems
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• v.17 no.3
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• pp.462-472
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• 2021

With an increase in the scale of recommender systems, users' rating data tend to be extremely sparse. Some methods have been utilized to alleviate this problem; nevertheless, it has not been satisfactorily solved yet. Therefore, we propose an effective pre-rating method based on users' dichotomous preferences and average ratings fusion. First, based on a user-item ratings matrix, a new user-item preference matrix was constructed to analyze and model user preferences. The items were then divided into two categories based on a parameterized dynamic threshold. The missing ratings for items that the user was not interested in were directly filled with the lowest user rating; otherwise, fusion ratings were utilized to fill the missing ratings. Further, an optimized parameter λ was introduced to adjust their weights. Finally, we verified our method on a standard dataset. The experimental results show that our method can effectively reduce the prediction error and improve the recommendation quality. As for its application, our method is effective, but not complicated.

• Korean Journal of Social Welfare
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• v.51
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• pp.119-140
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• 2002

The main premise of this study is that family involvement which is based on professional-family collaborative partnership is very important for successful treatment and rehabilitation of the mentally ill. Accordingly, this study aims to find out factors which are related to family involvement in therapeutic process. This study conducted the survey with 275 service providers(i.e. mental health professionals) and with 124 service consumers(i.e. family members) in order to discover in what extent do related factors affect on the family involvement. The major findings of the study are; 1) From the service providers standpoint, using multiple regression, job characteristics, perception of family culpability, frequency of contact with family, functioning of their organization affect significantly on the family involvement by 33.0% of explanatory power. Using a step-wise multiple regression, the most powerful influenced factors on family involvement are frequency of contact with family, type of agency, type of profession, and their career. 2) From the service consumers standpoint, using multiple regression, socioeconomic level, attitudes of professionals, optimistic perception of prognosis, functioning of their family, diagnosis affect significantly on the family involvement by 40.9% of explanatory power. Using a step-wise multiple regression, the most powerful influenced factors on family involvement are economic level, attitudes of professionals, optimistic perception of prognosis, educational level. In conclusion, family accessibility to the therapeutic system must be allowed and further, politically encouraged by the related legislation. Also this study recommends clinician to use an empowerment model for the families with the mentally ill.

• Journal of The Korean Association For Science Education
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• v.44 no.1
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• pp.77-86
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• 2024

This study analyzed students' discourse and learning to investigate the impact of using Google Docs in science classes. The researcher, who is also a science teacher, conducted classes for 49 second-year middle school students. The classes included one using Google Docs and another using traditional paper worksheets covering identical content. Students' discourse collected from each class was compared and analyzed using Epistemic Network Analysis (ENA). The findings indicated that in the class using Google Docs, the proportion of discourse related to task was higher compared to the traditional class. More specifically, discourse regarding taking and uploading photos was prominent. However, such discourse did not lead to peer learning as intended by the teacher. An analysis based on achievement levels revealed that the class utilizing Google Docs had a relatively higher proportion of discourse from lower-achieving students. Additionally, differences were observed in the types of utterances and connection structures between the higher and lower-achieving students. The higher-achieving students took a leading role in providing suggestions and explanations, while the lower-achieving students played a role in transcribing them, with this tendency being more pronounced in the class using Google Docs. Lastly, students' changes in perception regarding the cause of static electricity were visualized using ENA. Based on the research findings, this study proposes strategies to enhance collaborative learning using Google Docs, including the use of open-ended problems to allow diverse opinions and outputs, and exploring the potential use of ENA to assess the learning effects of conceptual learning.

• Journal of The Korean Association For Science Education
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• v.36 no.4
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• pp.519-526
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• 2016

The purpose of this study is to investigate the influences of small group learning using smart devices in science classes on students' achievement, learning motivation, attitude toward science lessons, and perception of small group learning using smart devices. Four 11th-grade classes (N=133) at a coed high school in Seoul were randomly assigned to a control group and a treatment group. The intervention of small group learning using smart devices emphasized collaborative writing on activity sheet. The students were taught about acid, base, and neutralization reaction for six class periods. After the instructions, an achievement test, the learning motivation test, the attitude toward science lessons test, and a questionnaire on the perception of small group learning using smart devices were administered. Two-way ANCOVA results revealed that there was a statistically significant interaction effect by their previous chemistry achievement in the achievement test scores. Only low-level students in small group learning using smart devices significantly improved their achievement probably by having the opportunities to get help from high-level students. The adjusted means of the treatment group were significantly higher than those of the control group in learning motivation and attitude toward science lessons. Students' perceptions of small group learning using smart devices tended to be positive. Educational implications of this study are discussed.

• Journal of Korean Academy of Nursing
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• v.47 no.1
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• pp.14-24
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• 2017

Purpose: The purpose of this study was to construct and test a hypothetical model of self-management in patients with hemodialysis based on the Self-Regulation Model and resource-coping perspective. Methods: Data were collected from 215 adults receiving hemodialysis in 17 local clinics and one tertiary hospital in 2016. The Hemodialysis Self-management Instrument, the Revised Illness Perception Questionnaire, Herth Hope Index and Multidimensional Scale of Perceived Social Support were used. The exogenous variable was social context; the endogenous variables were cognitive illness representation, hope, self-management behavior, and illness outcome. For data analysis, descriptive statistics, Pearson correlation analysis, factor analysis, and structural equation modeling were performed. Results: The hypothetical model with six paths showed a good fitness to the empirical data: GFI=.96, AGFI=.90, CFI=.95, RMSEA=.08, SRMR=.04. The factors that had an influence on self-management behavior were social context (${\beta}=.84$), hope and cognitive illness representation (${\beta}=.37$ and ${\beta}=.27$) explaining 92.4% of the variance. Self-management behavior mediated the relationship between psychosocial coping resources and illness outcome. Conclusion: This research specifies a more complete spectrum of the self-management process. It is important to recognize the array of clinical resources available to support patients' self-management. Healthcare providers can facilitate self-management through collaborative care and understanding the ideas and emotions that each patient has about the illness, and ultimately improve the health outcomes. This framework can be used to guide self-management intervention development and assure effective clinical assessment.

• Journal of Preventive Medicine and Public Health
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• v.51 no.1
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• pp.41-50
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• 2018

Objectives: To explore alcohol perceptions and their association hazardous alcohol use in the populations of Alberta, Canada and Queensland, Australia. Methods: Data from 2500 participants of the 2013 Alberta Survey and the 2013 Queensland Social Survey was analyzed. Regression analyses were used to explore the association between alcohol perceptions and its association with hazardous alcohol use. Results: Greater hazardous alcohol use was found in Queenslanders than Albertans (p<0.001). Overall, people with hazardous alcohol were less likely to believe that alcohol use contributes to health problems (odds ratio [OR], 0.46; 95% confidence interval [CI], 0.27 to 0.78; p<0.01) and to a higher risk of injuries (OR, 0.54; 95% CI, 0.33 to 0.90; p<0.05). Albertans with hazardous alcohol use were less likely to believe that alcohol contributes to health problems (OR, 0.48; 95% CI, 0.26 to 0.92; p<0.05) and were also less likely to choose a highly effective strategy as the best way for the government to reduce alcohol problems (OR, 0.63; 95% CI, 0.43 to 0.91; p=0.01). Queenslanders with hazardous alcohol use were less likely to believe that alcohol was a major contributor to injury (OR, 0.39; 95% CI, 0.20 to 0.77; p<0.01). Conclusions: Our results suggest that people with hazardous alcohol use tend to underestimate the negative effect of alcohol consumption on health and its contribution to injuries. In addition, Albertans with hazardous alcohol use were less in favor of strategies considered highly effective to reduce alcohol harm, probably because they perceive them as a potential threat to their own alcohol consumption. These findings represent valuable sources of information for local health authorities and policymakers when designing suitable strategies to target alcohol-related problems.

• Journal of Digital Contents Society
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• v.19 no.5
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• pp.935-944
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• 2018

The purpose of this study is to investigate the impact of Airline Partner Organization members ' perception of supply chain management characteristics on the satisfaction of the relationship and to verify the parameter effectiveness of collaboration. An empirical study was conducted through survey techniques to achieve the objectives of the study. Research has shown that the factors for building trust, immersion, and sharing of vision tables, other than information sharing, are significant prerequisites for collaboration. We have identified statistically significant effects of collaborative factor on relationship satisfaction factor. Additionally, it was confirmed that there was a parameter effect between supply chain management characteristics recognition and relationship satisfaction by testing the effectiveness of the collaboration.

• Child Health Nursing Research
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• v.13 no.4
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• pp.383-389
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• 2007

Purpose: In this study, the Internet game addiction level was assessed, and parent-child attachment level associated with the addiction was analyzed. Method: From December 5 to 23, 2005, self-reported questionnaire data were collected from 990 Busan City elementary school students of the 5th and 6th grades. The questionnaire consisted of questions about their characteristic features in playing Internet games based on the K-scale developed by KADO. The data were analyzed using the SPSS WIN 10.0 program. Frequency, percentage, arithmetic mean, and standard deviation, $X^2$-test, ANOVA analysis and Scheffe test were used to analyze the data. Results: 1. With regard to the level of Internet game addiction, 71.2% of the students responded that they were general users, and 6.3%, at high risk for addiction. Mean scores were 103.3 for the high-risk group, 77.7 for the potential risk group, and 55.86 for the general user group. The total mean was 63.74. 2. Mean scores for parent-child attachment levels were 97.1 and 99.6 for father and mother, respectively. Conclusion: These results suggest that a collaborative program to educate and counsel parents to increase the parent-child attachment level needs to be established in protection and recovery programs for Internet game addiction.

• Journal of The Korean Association For Science Education
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• v.32 no.7
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• pp.1169-1186
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• 2012

The purpose of this study was to investigate the direction of science gifted education based on creativity and character by perception in the gifted education field. Data was collected by in-depth interviews with nine teachers, 10 science gifted students, and their parents, individually or in groups. The results of the study showed that the participants perceived character, creativity, leadership and morality as the important capabilities to have in the future society. Also, they wanted to explore science as much as they wished, form values as a leader, and feel a sense of accomplishment through a collaborative research project. The study suggested that it needed to construct cooperative learning and self-directed scientific investigation for science gifted education based on creativity and character.

• Journal of Information Management
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• v.43 no.1
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• pp.89-108
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• 2012

Deeper understandings of school library-assisted instruction from teachers are required to develop students' self-directed learning skills which can improve their learning capabilities, problem solving techniques and learning attitudes. The objective of this study was to examine whether there is difference in subject teachers' perception of the necessity and effectiveness of the group type, class model, and collaborative class of class utilizing the school library and to apply and activate class utilizing the school library constructively in the field of education. For this purpose, this study inquired into the concept, necessity, type and process of class utilizing the school library, etc. and conducted a questionnaire survey of 278 subject teachers sampled from 30 high schools in 10 areas of Gyeonggido.