• Journal of the Korean Magnetics Society
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• v.17 no.6
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• pp.246-252
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• 2007

This paper describes the effect of the mixing ratio of starting materials and the growth parameters of magnetic garnet films by LPE on the properties of the films and suggests the conditions to obtain the films suitable for the Faraday rotators of the optical CTs. The properties of the films investigated for the evaluation of the films were thickness, surface morphology, X-ray diffraction, lattice constant, lattice mismatch between film and substrate (single crystal nonmagnetic wafer), and Faraday rotation angle. Optical CTs have been fabricated and evaluated using the films grown.

• The Journal of the Korea Contents Association
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• v.14 no.4
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• pp.336-345
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• 2014

Social dating contents that transformed from online dating service needs understanding about the market status, magnitude, business concept and related area, and its development process. Nowadays the field of dating service had expanded from off-line to on-line, and then started to be changed to social dating services with the development of the highest smart phone penetration rate. Therefore, we investigated about the market, business concept and its functions of social dating application, and then classified the typology of those social dating applications according to feature with utilization rate of user. We had described about its partial deficits and improvements on the social dating application through comparative analysis and business model analysis about successful case. As conclusions, we suggested future strategies of competition and directivity with an improving way about concrete plan for industry development of social dating application.

• Journal of Convergence for Information Technology
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• v.10 no.9
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• pp.136-146
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• 2020

In order to verify that the ego-resiliency regulates the effect of nursing care workers job stress on the job satisfaction, this research ascertained the effect of job stress of the nursing care workers working at Seoul-type Day Care Center and confirmed the moderating effect of ego-resiliency on the process where nursing care workers job stress affects the job satisfaction. A survey of 256 employees at 28 Seoul-type Day Care Centers were conducted on job stress, job satisfaction, and ego-resiliency, and 138 nursing care workers were analyzed. The data analysis was conducted using SPSS PROCESS Macro, which was presented by SPSS 25.0 and Hayes. The results of the study are as follows. First, nursing care workers had higher job stress and lower job satisfaction compared to other job groups. Second, job stress identified the negative effect job satisfaction. Third, ego-resiliency confirmed positive moderating effect between job stress and job satisfaction.

• Journal of KIISE:Information Networking
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• v.37 no.4
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• pp.255-262
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• 2010

Recently, automated signature generation systems(ASGSs) have been developed in order to cope with zero-day attacks with malicious codes exploiting vulnerabilities which are not yet publically noticed. To enhance the usefulness of the signatures generated by (ASGSs) it is essential to identify signatures only with the high accuracy of intrusion detection among a number of generated signatures and to provide them to target security systems in a timely manner. This automated signature exchange, distribution, and update operations have to be performed in a secure and universal manner beyond the border of network administrations, and also should be able to eliminate the noise in a signature set which causes performance degradation of the security systems. In this paper, we present a system architecture to support the identification of high quality signatures and to share them among security systems through a scheme which can evaluate the detection accuracy of individual signatures, and also propose a set of algorithms dealing with exchanging, distributing and updating signatures. Though the experiment on a test-bed, we have confirmed that the high quality signatures are automatically saved at the level that the noise rate of a signature set is reduced. The system architecture and the algorithm proposed in the paper can be adopted to a automated signature sharing framework.

• Journal of the Institute of Convergence Signal Processing
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• v.15 no.2
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• pp.55-63
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• 2014

In this paper, we introduce the performance evaluation of data archive system for saving correlation result of Daejeon correlator with high-data rate. Daejeon correlator supports various correlation modes, but the speed of correlation result is affected by correlator according to the integration time in each mode. Maximum data rate of Daejeon correlator is 1.4GB/s in case of C1 mode with 25.6ms integration time. In this research, the performance evaluation of the proposed data archive system is conducted for saving correlation results connected with 4 10GbE optical cable with VCS (VLBI Correlation Subsystem), which is the core system of Daejeon correlator. For the experiments, the data archive system for 2 benders was selected and benchmark test was performed. In this paper, the developed data generation program of VCS correlation result file for benchmark test and evaluation results are described.

• 환경사랑
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• s.23
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• pp.6-8
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• 2000

지난 한해 국내 스티로폴 재활용률은 $48.8\%$. 폐지원에 대한 재활용 촉진화 측면에서 이제 스티로폴도 $50\%$에 육박하는 재활용률로 소중한 재활용 품목의 하나로 자리잡아 가고 있다. 특히 지난해 스티로폴 재활용을 통해 생산된 재생 원료와 재활용 사진액자는 연간 930만 달러의 외화를 벌어들이는 수출 실적을 나타냈다. 이는 협회를 비롯한 관련 업체들과 각 지방자치단체(이하 지자체)들의 재활용 의지를 단적으로 드러낸 결과다. 올해 두 번째를 맞는 스티로폴 재활용 우수 지자체 시상식이 마포 홀리데이인 서울 호텔에서 개최됐다. 스티로폴 재활용에 이바지한 전국 15개 우수 지자체가 함께 자리를 했다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.8 no.4
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• pp.139-144
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• 1983

In this paper, the ploarization and Faraday rotation properties of the single mode optical fiber have been investigated for magnto-optic current transformer application. On the analysis, the optical fiber is modeled as a linear retarder and the intrinsic birefreingence of the optical fiber is approximately found to be 2.57'/m from the measurement, and the bend-induced birefringence is proportional to the inverse square of bending radius. The polarization rotation sensitivity is foung to be F/H=1.4x$10^-5$rad/[A/m] from the analysis of Faraday rotation of single mode optical fiber.

• Journal of the Korean Institute of Telematics and Electronics
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• v.20 no.6
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• pp.52-57
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• 1983

We report a theoretical study on wave propagation in magneto-optic thin-film waveguides. The field distribution and phase velocity of the guided hybrid modes are analyzed in terms of the phase difference of basic system modes and the Faraday rotation of the magneto-optic thin film. Splitting of the phase constant curves due to the F araday rotation is discussed. The present hybridmode analysis leads to a conversion matrix which shows that the distance dependence of the mode conversion in the guide is different from that in the bulk medium.

• Journal of Digital Contents Society
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• v.12 no.3
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• pp.291-298
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• 2011

The DAISY, an international digital talking book standard, has been established to help reading-disabled people read books normally. As many societies' interests in reading-disabled people are arising, reading environment for them is also getting improved by supplying alternative books. In the digital world, however, there is still lack of e-book playing software for them. In this paper, we design and partially implement an android smartphone e-book viewer. By analyzing the features and relations of DAISY3 files, we can find several important design points to properly implement DAISY3 viewer. We are sure, when using our results, that various DAISY3-compliant e-book viewers can be implemented easily and quickly.

• Horticultural Science & Technology
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• v.32 no.6
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• pp.887-900
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• 2014

This study was conducted to provide a job analysis for, and assess the job performance of horticultural therapists, as well as examine future educational needs. To this end, a chart developed using the DACUM method was chosen as the appropriate tool for the job analysis of horticultural therapists (Study 1). Based on the chart, a survey using an evaluation form was produced to investigate the current level of job performance and future required level of horticultural therapists (Study 2). A total of 8 duties and 45 tasks were classified to examine job performance, based on analysis of the DACUM Council (Study 1). These duties include A. Decide execution organization for horticultural therapy (HT) program, B. Diagnose and assess clients before starting the HT program, C. Plan HT program, D. Develop HT program, E. Prepare to implement HT program for each session, F. Implement HT program for each session, G. Implement overall assessment for HT program, and H. Develop oneself as a horticultural therapist. Their duties were broken down further into five to eight tasks per duty, totaling 45 tasks. Based on the horticultural therapist job performance sheet developed through this process, an assessment of the current job level of horticultural therapists was performed and future required level were examined (Study 2). The evaluation forms were sent to 779 horticultural therapists with level 1 or 2 certification via email or mail delivery. The analysis of 242 questionnaires (31.1%) revealed that horticultural therapists with level 1 certificates have a significantly higher job performance level for 34 of the 45 tasks. Regarding future required level, 20 out of 45 tasks were assessed as higher for level 1 horticultural therapists than level 2. In addition, a Borich formula was utilized to identify the priority of educational needs for the 45 horticultural therapist tasks. The results revealed the following top three tasks: H1. Receive feedback from the supervisor for the horticultural therapy program; A1. Distribute promotional materials about the horticultural therapy program; and H2. Submit a grant proposal for horticultural therapy program to organizations such as welfare foundations. The results of this study are anticipated to facilitate understanding and improve work conditions for current horticultural therapists or horticultural therapists-in-training. In addition, institutions that train horticultural therapists will be able to use this as basic research to develop a practical training curriculum.