• Journal of Drive and Control
• /
• v.9 no.3
• /
• pp.56-66
• /
• 2012

• Proceedings of the Korea Society of Information Technology Applications Conference
• /
• 2006.06a
• /
• pp.184-184
• /
• 2006

• Korean Journal of Optics and Photonics
• /
• v.2 no.2
• /
• pp.103-107
• /
• 1991

Nonlinearity of glass had not been remarkably large among all the available nonlinear materials. However, its superiority in optical and mechanical properties has attracted much attention for the practical application. To this goal the recent interests in this field have been shifting from the understanding of nonlinear mechanisms to the improvements of nonlinear properties.

• Magazine of RCR
• /
• v.18 no.4
• /
• pp.56-63
• /
• 2023

• Journal of the Korean School Mathematics Society
• /
• v.8 no.2
• /
• pp.117-143
• /
• 2005

This study is aimed at checking on the extent of practical use of CAI in mathematical classes in secondary schools, thus seeking a way of activating the practical use of CAI, with computer networks being widely used for education. This research was conducted among some 120 mathematics teachers and 350 students in middle and high schools in the City of Kunsan, with questionnaires designed to survey the extent and effectiveness of the use of CAI, the teachers and students' awareness of CAI. In consequence, this research shows the following: The use of CAI was of considerable help in conducting mathematics classes, along with CAI used in a more effective way, but education materials concerning CAI were poorly managed and not a few teachers was negative toward the use of CAI in mathematics classes. In short, the practical use of CAI was unsatisfactory, probably due to the lack of application ability on the part of teachers caused by the perfunctory teachers' training. In conclusion, the practical use of CAI in classes can be activated as follows: CAI apparatuses and other teaching aids should be systematically managed by experts; high-quality CAI programs need to be developed to help teachers conduct effective classes; teachers should be positively encouraged to make practical use of CAI through teachers' training and a plan of obligating teachers to use CAI for one or two fixed class hours in a week may be strongly recommended.

• Korean Journal of Remote Sensing
• /
• v.31 no.1
• /
• pp.1-9
• /
• 2015

Mobility and cloud platform have become the dominant paradigm to develop web services dealing with huge and diverse digital contents for scientific solution or engineering application. These two trends are technically combined into mobile cloud computing environment taking beneficial points from each. The intention of this study is to design and implement a mobile cloud application for remotely sensed image fusion for the further practical geo-based mobile services. In this implementation, the system architecture consists of two parts: mobile web client and cloud application server. Mobile web client is for user interface regarding image fusion application processing and image visualization and for mobile web service of data listing and browsing. Cloud application server works on OpenStack, open source cloud platform. In this part, three server instances are generated as web server instance, tiling server instance, and fusion server instance. With metadata browsing of the processing data, image fusion by Bayesian approach is performed using functions within Orfeo Toolbox (OTB), open source remote sensing library. In addition, similarity of fused images with respect to input image set is estimated by histogram distance metrics. This result can be used as the reference criterion for user parameter choice on Bayesian image fusion. It is thought that the implementation strategy for mobile cloud application based on full open sources provides good points for a mobile service supporting specific remote sensing functions, besides image fusion schemes, by user demands to expand remote sensing application fields.

• Journal of information and communication convergence engineering
• /
• v.19 no.4
• /
• pp.248-256
• /
• 2021

The purpose of this study was to introduce an application as a learning medium that can be used by students to prepare Solo bridal paes. This application can be used by make-up beginners who are learning about Solo bridal paes. This study used a quasi-experimental method with a randomized pretest-posttest control group. The paes application can be used as a medium in Solo bridal makeup learning, because it is highly effective in helping students prepare Solo bridal paes. This application is also considerably practical because it can be installed on smartphones. Experimental results revealed a difference between the control and experimental classes. Students in the experimental class could prepare paes neatly, and their shapes were proportional to the face of the model. The use of augmented reality as a medium to teach Solo bridal makeup, especially for making paes, is an innovation in the world of education. This application can help students make paes.

• Journal of Korean Clinical Nursing Research
• /
• v.15 no.3
• /
• pp.61-74
• /
• 2009

Purpose: In order to increase the quality of nursing care for patients with diabetes mellitus, it is important for clinical nurses to accept changes in diabetes knowledge and correct their approach immediately. This approach will also contribute to effective nursing practice. Methods: The study was designed to investigate the level of knowledge and diffusion of knowledge for nursing care of patients with diabetes mellitus among clinical nurses. It was conducted with nurses from 29 general hospitals in Korea from November 3 to December 5, 2008. The questionnaire consisted of 129 items and it was sent to the participants by mail. Of the 1,060 questionnaires returned, only 930 were valid for use in the statistical analysis. Results: 1) The average score for clinical nurses' knowledge of diabetes mellitus was 0.67 out of 1.0. 2) The level of persuasion of knowledge for nursing care of patients with diabetes mellitus averaged 0.64 out of 1.0 3) The level of practical application of knowledge for nursing care of patients with diabetes mellitus averaged 1.05 out of 2.0, indicating that they applied their knowledge 'sometimes'. 4) The level of diffusion of knowledge for nursing care of patients with diabetes mellitus was 2.37 out of 4.0 and level was estimated as the stage of 'persuasion'. 5) There were significant differences in nursing knowledge of diabetes mellitus, according to experience in practical education for diabetes mellitus. Conclusion: The results indicate that nurses with a lower level of knowledge of diabetes mellitus have a lower level of persuasion of knowledge for nursing care of patients with diabetes mellitus and lower practical application. To improve the level of nurses' knowledge of diabetes mellitus, practical training programs are needed for areas in which knowledge level is low, such as 'diagnosis and management of diabetes mellitus', 'oral diabetes medication', and 'glucose control in special conditions'.

• Journal of Microbiology and Biotechnology
• /
• v.18 no.10
• /
• pp.1634-1640
• /
• 2008

This study was focused on the screening of valuable genetic resources, such as promoters from metagenome, and describes a promoter trapping system with a bidirectional probe concept, which can select promoters or operons from various biological resources including metagenomic DNA. A pair of reporters, GFP and DsRed, facing the opposite direction without promoters, is an effective system that can function regardless of the direction of inserted promoters. The feasibility of this system was tested for the isolation of constitutively expressed promoters in E. coli from a soil metagenome, resulting in a potential pool of various promoters for practical application. The analyses of structural organization of the trapped genes demonstrated that constitutively expressible promoters in E. coli were broadly distributed within the metagenome, and suggested that some promoters were useful for the construction of expression vectors. Based on these observations, three constitutive promoters were employed in the expression vector system and their potentials for practical application were evaluated in terms of expression level, protein solubility, and effects on host growth.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.12 no.4
• /
• pp.1832-1853
• /
• 2018

The personal health record (PHR) system is a promising application that provides precise information and customized services for health care. To flexibly protect sensitive data, attribute-based encryption has been widely applied for PHR access control. However, escrow, exposure and abuse of private keys still hinder its practical application in the PHR system. In this paper, we propose a coordinated ciphertext policy attribute-based access control with user accountability (CCP-ABAC-UA) for the PHR system. Its coordinated mechanism not only effectively prevents the escrow and exposure of private keys but also accurately detects whether key abuse is taking place and identifies the traitor. We claim that CCP-ABAC-UA is a user-side lightweight scheme. Especially for PHR receivers, no bilinear pairing computation is needed to access health records, so the practical mobile PHR system can be realized. By introducing a novel provably secure construction, we prove that it is secure against selectively chosen plaintext attacks. The analysis indicates that CCP-ABAC-UA achieves better performance in terms of security and user-side computational efficiency for a PHR system.