• Management & Information Systems Review
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• v.23
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• pp.135-156
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• 2007

The aims of this study are to determine if the perceived risk of e-commerce affect the Internet shopping mall users' decision to pre-purchase an item via e-commerce, to find out if there are differences among the induced perceived risk according to gender, and to verify if the perceived risk according to gender have a correlation to a person's decision to pre-purchase an item via e-commerce. It can thus be concluded that the pre-perceived risk of e-commerce affect the Internet shopping mall users' purchase intention. Different results were obtained, though, according to gender. Moreover, the perceived risk of e-commerce based on gender and the purchase intention of the Internet shopping mall users were shown not to have a correlation. This means that although slightly different study results were presented, e-commerce purchasers can use these results to recognize the risk of e-commerce.

• Journal for History of Mathematics
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• v.30 no.3
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• pp.163-183
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• 2017

In this study we reveal that there were positive changes after the practicums of pre-service math teachers, in that, they changed contents of class and the way of explanation in order to enhance students' understanding, and provided opportunities for students to participate in the class. In addition, they made more use of textbooks in their class instead of depending on their experience acquired before the practicums. However, no difference was found before and after their practicums, neither in their review of lessons nor in their use of simple 'question and answer' strategies. In this regard, we suggest continuous researches be conducted in order to enhance pre-service mathematics teachers' teaching ability, especially those which is hard to be acquired in a short period of time. And, reflecting the results of the research, systematic development and operation of the curriculum are required in the teacher training institutes.

• Journal of Families and Better Life
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• v.19 no.5
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• pp.67-82
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• 2001

This article was carried out to clarify the change in the weaving labor and the status of women from pre-industrial society to industrial society. For the purpose, this study made use of literature review. It was founded that women in pre-industrial society had weaved not only for private use but also for payment taxes and household economy. In this sense the women in pre-industrial society had participated in productive work like the ones of industrial society who participate in labor force market. With this economic activity women had occupied the status not being evaluated low. The major conclusion was as follows. The women in pre-industrial society had maintained their own economic activity with contributed to nation and household economy, but the women in industrial society were deprived of this activity and their status was depreciated.

• Restorative Dentistry and Endodontics
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• v.49 no.2
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• pp.14.1-14.13
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• 2024

This study aimed to answer the question through a systematic review: Can carbamide peroxide be as effective as hydrogen peroxide and cause less in-office bleaching sensitivity? A literature survey was performed in PubMed/MEDLINE, Embase, Scopus, ISI Web of Science, and gray literature. Primary clinical trials that compared the efficacy or the in-office bleaching sensitivity between carbamide and hydrogen peroxides were included. The risk of bias was evaluated using the RoB2. The certainty of the evidence was assessed using the GRADE approach. DPI training significantly improved the mean scores of the dental undergraduates from 7.53 in the pre-DPI-training test to 9.01 in the post-DPI-training test (p < 0.001). After 6 weeks, the mean scores decreased marginally to 8.87 in the retention test (p = 0.563). DPI training increased their confidence level from 5.68 pre-DPI training to 7.09 post-DPI training. The limited evidence suggests that the 37% carbamide peroxide may be similarly effective to the 35% hydrogen peroxide for bleaching teeth in-office and causes less bleaching sensitivity. However, more well-designed split-mouth clinical trials are necessary to strengthen the evidence.

• Journal of Korean Elementary Science Education
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• v.38 no.2
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• pp.287-304
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• 2019

Teaching with technology has been widespread in practical classroom settings, and increased the needs to enhance pre-service teachers' capability with a variety of technologies. The purpose of this study is focused on designing and implementing a training program to develop pre-service teachers' Technological Pedagogical Content Knowledge(TPACK) which promotes them use technologies tactically in integrated science classes. Based on the theoretical framework of TPACK and Practitioner's Guide to TPACK, the authors developed ten periods of lessons comprised instructional skills in elementary science education. Subsequently, the program was applied into a teacher trainee course in Korea. The results of this study indicate that the TPACK training program for pre-service teachers significantly influenced on attitude toward convergence, TPACK, and science teaching efficacy of the engaged participants. The developed program, meanwhile, caused a significant TPACK improvement of female participants of the teachers college more effectively. Furthermore, it mitigated the gap between science and humanity tracks coming from their high schools. Consequently, there are possibilities to improve pre-service teachers' teaching strategies for integrated classes, if they have opportunities to review the comprehensibility of technological, pedagogical, content knowledge, and intersected areas with metacognitive perspectives.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.10 no.1
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• pp.1-10
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• 2007

Outcome of liver transplantation for children with end liver disease has been improved markedly during last two decades. Improvement of immunosuppressive agent and its strategy to use in children, development of innovative surgical technique, and better understanding of the course of liver transplantation attributed to better outcome of pediatric liver transplantation. Therefore this review article will focus on the problems which can occur during pre- and post-transplantation period, current strategy to use immunosuppressive agent for the better understanding of pediatrician who is not involved in transplantation but takes care of the children pre- and postoperatively.

• Environmental and Resource Economics Review
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• v.9 no.4
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• pp.701-725
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• 2000

Environmental taxes tend to compound the welfare cost of pre-existing tax distortions, the tax-interaction effect, however they also raise government revenues, tax revenue-recycling effect. By incorporating these two opposite tax effects, this paper examines a second- best environmental taxation for a polluting monopolist with distortionary taxes. The analysis suggests that the complications posed by pre-existing tax distortions as well as market structure can be key considerations in designing environmental taxes. In the tax setting game between regulator and regulated firm, we also derive the equilibrium tax rate and examine its relationship with distortionary taxes.

• Journal of Information Processing Systems
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• v.18 no.5
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• pp.650-664
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• 2022

Mobile applications can be easily downloaded and installed via markets. However, malware and malicious applications containing unwanted advertisements exist in these application markets. Therefore, smartphone users install applications with reference to the application review to avoid such malicious applications. An application review typically comprises contents for evaluation; however, a false review with a specific purpose can be included. Such false reviews are known as fake reviews, and they can be generated using artificial intelligence (AI)-based text-generating models. Recently, AI-based text-generating models have been developed rapidly and demonstrate high-quality generated texts. Herein, we analyze the features of fake reviews generated from Generative Pre-Training-2 (GPT-2), an AI-based text-generating model and create a model to detect those fake reviews. First, we collect a real human-written application review from Kaggle. Subsequently, we identify features of the fake review using natural language processing and statistical analysis. Next, we generate fake review detection models using five types of machine-learning models trained using identified features. In terms of the performances of the fake review detection models, we achieved average F1-scores of 0.738, 0.723, and 0.730 for the fake review, real review, and overall classifications, respectively.

• 한국방재학회:학술대회논문집
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• 2008.02a
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• pp.135-138
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• 2008

As the procedure of the close examination of disaster impact at the initial stage of the beginning of development plans, the newly extablished Pre Disaster Impact Assessment Review Deliberation (PDIARD) system which have been introduced through the revision of the Natural Disaster Countermeasure Act-revised at August, 2005 is enforced for the purpose of the disaster prevention which caused during a development projects. From that time down to this day, the PDIARD system have been reviewed about 6,000 cases totally. However, the current the PDIARD system at the uppermost limit in the aspect of every Acts and operational problems is in need of sustaining supplementation at the present situation. To cope with this operational remedy related to the PDIARD system, this study deals in 3 major concerns. First, it is required to fix a criterion in detail because of a wide range of the subject plans of deliberation. Second, there is some ambiguity according to the area or length of the subjected administrative and development plans. So it should be excepted of the targeted plans which has few probability in disaster potential or vulnerability. Finally, the subjected plans need to be added as to the continuous urbanization and industrialization and the enactment or revision of the Acts related. This study focuses on the investigation and analysis to find out the improvement way about the main problem pending of the PDIARD system, consequently suggests a effective remedy and new categories, including future directions and detailed plans for operation.

• Journal of the Korean Home Economics Association
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• v.44 no.5 s.219
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• pp.157-169
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• 2006

The purpose of this study was to verify the effectiveness of a life review-narrative group therapy program aimed at increasing ego-integrity in the elderly. The life review-narrative group therapy program was organized according to the tfe course from childhood to old age. The objectives of the program were for the elderly to enhance their self-worth, become aware of their individual self existence, accept aging and death, accept the past and present life, and to make the most of their experiences of overcoming difficulties. The counseling techniques used in the program were mainly reminiscence and re-authoring of the narrative therapy. Thirty-two elderly people aged 60 years and over (16 in each of experimental and control groups) were selected randomly from the Daegu Metropolitan City General Welfare Center for the research. The two groups were identified as equivalent for the study in a pre-test. The program of the experimental group was implemented twice a week for 90 minutes per session over a 6-week period (Sep. 8th - Oct. 14th. 2005). The pre (Sep. 8th 2005), the post (Oct. 14th. 2005) and follow-up (Nov. 14th. 2005) tests were implemented in ordo, to verify the effectiveness of the program. The instruments used in the study were the Ego-Integrity Scale. The data were analyzed using t-test, and Ore-Factor Repeated Measures ANOVA. The findings of the study were as follows. The experimental group evidenced significant effects on enhancing ego-integrity. The result of the post hoc multiple comparisons showed that the effects of the life review-narrative group therapy Program were maintained for one months. Meanwhile the control group did not show any significant change in ego-integrity. Based on these findings, the limitations of the study were discussed, and further research was suggested.