• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.16 no.12
• /
• pp.3836-3854
• /
• 2022

The student group division is benefit for universities to do the student management based on the group profile. With the widespread use of student smart cards on campus, especially where students living in campus residence halls, students' daily activities on campus are recorded with information such as smart card swiping time and location. Therefore, it is feasible to depict the students with the daily activity data and accordingly group students based on objective measuring from their campus behavior with some regular student attributions collected in the management system. However, it is challenge in feature representation due to diverse forms of the student data. To effectively and comprehensively represent students' behaviors for further student group division, we proposed to adopt activity data from student smart cards and student attributes as input data with taking account of activity and attribution relationship types from different perspective. Specially, we propose a novel student group division method based on a multi-view student attribute heterogeneous information network (MSA-HIN). The network nodes in our proposed MSA-HIN represent students with their multi-dimensional attribute information. Meanwhile, the edges are constructed to characterize student different relationships, such as co-major, co-occurrence, and co-borrowing books. Based on the MSA-HIN, embedded representations of students are learned and a deep graph cluster algorithm is applied to divide students into groups. Comparative experiments have been done on a real-life campus dataset collected from a university. The experimental results demonstrate that our method can effectively reveal the variability of student attributes and relationships and accordingly achieves the best clustering results for group division.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2008.05a
• /
• pp.175-178
• /
• 2008

While read operation on flash memory is fast and doesn't have any constraints, flash memory can not be overwritten on updating data, new data are updated in new area. If data are frequently updated, garbage collection, which is achieved by erasing blocks, should be performed to reclaim new area. Hence, because the number of erase operations is limited due to characteristics of flash memory, every block should be evenly written and erased. However, if data with access locality are processed by cost benefit algorithm with separation of hot block and cold block, though the performance of processing is high, wear-leveling is not even. In this paper, we propose CB-MG (Cost Benefit between Multi Group) algorithm in which hot data are allocated in one group and cold data in another group, and in which role of hot group and cold group is exchanged every period. Experimental results show that performance and wear-leveling of CB-MG provide better results than those of CB-S.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.36 no.6A
• /
• pp.617-625
• /
• 2011

In wireless sensor networks, data dissemination protocols have been proposed for mobile sink groups that are characterized by geographically staying closely and collective movement. They usually exploit flooding technology for mobility supporting and data delivery guarantee. However, it causes the excessive energy consumption of all sensor nodes in the group region due to data delivery participation. Moreover, the costs of the flooding would become higher in proportional to the group region. In this paper, we propose an energy efficient data dissemination scheme that resolves these problems. The virtual infrastructure called a 'pipe' is used as a rendezvous area. A source delivers data to the pipe, from which member sinks in the group retrieve it directly. Simulation results showed that this solution has better performance than existing protocols in terms of energy consumption as it reduces the number of regional flooding and eliminates unnecessary data flooding.

• The Korean Journal of Rehabilitation Nursing
• /
• v.15 no.2
• /
• pp.126-132
• /
• 2012

Purpose: This study was conducted to examine the effects of group music therapy on psychiatric symptoms and interpersonal relationship in patient with schizophrenia. Methods: This was a quasi-experimental study with nonequivalent control group pretest-posttest design. The subjects were 63 patients with schizophrenia at S psychiatric sanatorium in D city. Thirty two patients were assigned to experimental group and thirty one patients were assigned to control group. Data were collected from August 4 to September 25, 2011. The group music therapy was conducted for 60 minutes, 8 times per week for 4 weeks. Data were analyzed using descriptive statistics, $x^2$ test and t-test with SPSS/WIN 19.0 version. Results: Experimental group receiving group music therapy showed significant improvements of psychiatric symptoms and interpersonal relationship. Conclusion: The study results indicate that group music therapy is an effective intervention program in improving psychiatric symptoms and interpersonal relationship of patients with schizophrenia.

• Journal of Korean Academy of Nursing
• /
• v.33 no.2
• /
• pp.228-235
• /
• 2003

Purpose: The main purpose of this study was to compare the effects of OSCE method and the traditional evaluation method on nursing skills performance of students enrolled in fundamentals of nursing courses. Method: The study was designed as a quasi-experimental, nonequivalent control group post test design with two classes of sophomore students attending fundamentals of nursing courses at one baccaleureate nursing school located in a metropolitan Seoul area. The control group was evaluated using a traditional method and the experimental group was evaluated using the OSCE method. Data were collected from June, 2001 to June, 2002. There were 35 students in the OSCE method group and 39 students in the control group. Data analysis was done using SPSS WIN 9.0. Result: The results showed that the students in the OSCE method group did significantly better in clinical nursing skills performance than the students in the traditional method group. And the OSCE method group showed significantly higher satisfaction score in the evaluation method than the control group. Conclusion: The OSCE method is an effective tool for evaluating clinical nursing skills performance in student nurses. It is necessary to explore more efficient ways to develop OSCE cases in wider areas of nursing education. It is also recommended to replicate similar studies in nursing education.

• The Journal of Korean Academic Society of Nursing Education
• /
• v.9 no.1
• /
• pp.73-80
• /
• 2003

Purpose: The main purpose of this study was to compare the effects of OSCE method and traditional evaluation method on nursing skills performance of students for the fever client. Method: The study was designed as a quasi-experimental, nonequivalent control group post test design with two classes of sophomore students attending fundamentals of nursing courses at one baccaleureate nursing school located in a metropolitan Seoul area. Control group was evaluated by using a traditional method and the experimental group was evaluated by using the OSCE method. Data were collected from April, 2001 to November, 2002. There were 35 students in the OSCE method group, 39 students in the control group. Data analysis was done using SPSS WIN 11.0. Result: The results showed that the students in the OSCE method group did significantly better in clinical nursing skills performance than the students in the traditional method group. And the OSCE method group showed significantly higher satisfaction score in the evaluation method than the control group. Conclusion: The OSCE method is an effective in evaluating clinical nursing skills performance for student nurses. It is necessary to explore more reliable ways to compare the evaluation method by the same student. Also, it is recommended to replicate similar studies in nursing education.

• Journal of the Korean Society of School Health
• /
• v.23 no.2
• /
• pp.308-316
• /
• 2010

Purpose: In this study, the researchers analyzed Adolescence's physical symptoms, self esteem and self identity to identify the effects and development of Maumgongbu group counseling on adolescents. Methods: There were two groups involved in this study: the group counseling team and the individual counseling group. Group counseling program was performed with 14 sessions, involving the students who applied for the program. Individual counseling was performed with 14 sessions through one-on-one session by students and their counselors. The data were collected three times: during the pre-treatment, post- treatment and 8 weeks after post-treatment using questionnaires. SPSS/WIN. 11.5 program was used for data analysis. Results: After the intervention, Group counseling prevented physical symptoms from getting worse. Self esteem improved during the pre-post treatments, and Self identity improved during the pre-8weeks after post-treatment in group counseling. Physical symptoms, Self esteem and Self identity aggravated during individual counseling groups. Conclusion: In this study, it was confirmed that the group counseling program was useful for the respondent's individual development through the improvement of their Physical symptoms and establishment of their Self identities through Maumgongbu group counseling.

• Journal of Korean Academy of Nursing
• /
• v.40 no.2
• /
• pp.255-263
• /
• 2010

Purpose: The purpose of this study was to determine effects of an empowerment education program (EEP) on internet games addiction, empowerment, and stress in middle school students. Methods: The EEP used in this study was based on the Freire' Empowerment Education Model. The research design of this study was a non-equivalent control group pretest-posttest design for 48 middle school students, who were conveniently assigned to an experimental group or a control group. The data were collected from May 29 to June 19, 2005. Data were analyzed using SPSS/PC program with frequencies, $\chi^2$-test, Fisher exact test, t-test, mean, standard deviation and ANCOVA. Results: 1) The first hypothesis that, "the experimental group would have higher empowerment scores than the control group. "was supported. 2) The second hypothesis that, "the experimental group would have lower internet games addiction scores than the control group."was supported. 3) The third hypothesis that, "the experimental group would have lower stress scores than the control group." was supported. Conclusion: We suggest, therefore, that the EEP should be used with adolescent to help them control their stress, internet games addiction and to increase their empowerment.

• Journal of Korean Biological Nursing Science
• /
• v.17 no.3
• /
• pp.245-252
• /
• 2015

Purpose: This study was to identify the effects of laughing and music therapy on depression and the activities of the autonomic nervous system in the elderly with dementia. Methods: The participants were 61 seniors over 65 years old with dementia, admitted to nursing homes. Twenty of them received laughing therapy, 21 received music therapy and 18 were in the control group. A total of 59 patients' data were analyzed. Depression was measured by Cornell Scale for Depression in Dementia tool, and the activities of the autonomic nervous system by the heart rate variability measuring device. The data were analyzed by frequency and percentage, Chi-square test, t-test, ANOVA, and Tukey test. Results: The depression of the music therapy group was more significantly decreased than the laughing therapy group and the control group. The activities of the autonomic nervous system of the laughing therapy group were more significantly increased than the music therapy group. The magnitude of the activities of the autonomic nervous system of the laughing therapy group were more significantly increased than the music therapy group. Conclusion: This study showed that music therapy was more effective than laughing therapy for the decrease of depression. Laughing and music therapy were more effective than in the control group for increasing the activities of the para-sympathetic nervous system and decreasing the activities of the sympathetic nerve system.

• The Korean Journal of Rehabilitation Nursing
• /
• v.8 no.1
• /
• pp.31-37
• /
• 2005

Purpose: This study was to evaluate the effects of foot reflexology on depression and anxiety in coal workers' pneumoconiosis. Method: The research design used was a non-equivalent control group pretest-posttest design. The foot reflexology was performed for 60 minutes twice a week through five weeks in the experimental group, not in the control group. The subjects of this study consisted of both the experimental group of twenty-nine and the control group of thirty coal workers' pneumoconiosis. The data were collected from December 10, 2002 to February 15, 2003. To evaluate the effects of foot reflexology the scores of depression and anxiety were measured before and after the experiment in both groups. Data of this experiment were analyzed by Chi-square test, t-test, unpaired t-test, ANCOVA and Repeated Measures ANOVA with the SAS Program. Results: The score of depression decreased in the experimental group, not in the control group. There was a significant difference of depression between the two groups. The score of anxiety decreased in the experimental group, not in the control group. There was a significant difference of anxiety between the two groups. Conclusion: As a summary of the study results, foot reflexology was regarded that it attributed to the emotional promotion of coal workers' pneumoconiosis. Therefore the foot reflexology is considered that might be used as an effective skill of nursing intervention program for coal workers' pneumoconiosis.