• Journal of The Korean Society of Agricultural Engineers
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• v.65 no.2
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• pp.35-45
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• 2023

The DOR (Drainage outlet raising) in the paddy field has been suggested as one of the most important best management practices for the TMDL (Total maximum daily load) management in the technical guidelines by the NIER (National institute of environmental research). However, this method is underestimated and is not well adopted by local governments for the TMDL. The purpose of this study is to evaluate the unit load reduction equation according to the application of DOR in order to expand this equation. The original equation in the guideline was derived using the HSPF (Hydrological Simulation Program-Fortran) model for 1 year in Changnyeong. We analyzed the reduction effect of the original equation application by collecting additional long-term monitoring data from the Buan, Icheon, Iksan, and Jeonju. When comparing the reduction loads between the original equation and monitoring results, the evaluation results of the original equation were 11% of the monitoring analysis results, which was underestimated. This means that the original equation needs to be improved. For assessing the equation, the HSPF Paddy-RCH model was established according to the NI ER guideline and evaluated for applicability. The performance results of the model showed a reasonable range by the statistical criteria. Modified equations 1 and 2 were proposed based on the monitoring and modeling results. Modified equation 1 was the method of modifying the original equation's main factors, and modified equation 2 was the method of applying the non-point pollution reduction efficiency according to the rainfall class using the long-term modeling results. At the level of 58.6~64.6% of monitoring data, the difference between them could be further reduced compared to the original equation. The suggested approach will be more reasonable and practicable for decision-makers and will contribute to the TMDL management plans.

• Journal of the Korea Society of Computer and Information
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• v.14 no.2
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• pp.103-110
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• 2009

We are witnessing rapid increase of the number of wireless devices available today such as cell phones, PDAs, Wibro enabled devices. Because of the inherent limitation of the bandwidth available for wireless channels, broadcast systems have attracted the attention of the research community. The main problem in this area is to develop an efficient broadcast program. In this paper, we propose a dynamic broadcast method that overcomes the limitations of static broadcast programs. It optimizes the scheduling based on the probabilistic model of user requests. We show that dynamic broadcast system can indeed improve the quality of service using user requests. This paper extends our previous work in [1] to include more thorough explanation of the proposed methodology and diverse performance evaluation models.

• Journal of Venture Innovation
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• v.5 no.2
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• pp.15-34
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• 2022

Many countries, including Korea, have established and operated various startup supporting programs to revitalize youth entrepreneurship. This study aims to identify the current status and characteristics of the major startup supporting programs currently operated in Korea and propose development plans for future startup supporting programs through analysis of the startup supporting systems of major countries. By analyzing the success factors of domestic and foreign startup supporting systems, we suggested improvements that can be operated more effectively in the areas of financial support, selection process, education and mentoring, networking, publicity and branding, and follow-up management by operated startup supporting programs. In addition, improvements for performance evaluation indicators of startup supporting programs were suggested and limitations of the study were presented.

• The Journal of the Convergence on Culture Technology
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• v.10 no.5
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• pp.143-151
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• 2024

This study proposes a guide to activate regional resource-based start-up projects by analyzing program planning, consultation, promotion, recruitment, operation, support, and performance measurement. It provides insights into effective methods for engaging prospective entrepreneurs interested in local brands.The study categorized 100 local start-up communities on platforms like YouTube and Instagram, identified suitable message characteristics for each channel, and measured conversion rates after distributing seven types of messages. Over four weeks, the messages received over 57,000 views, achieved a 13% conversion rate, and attracted about 100 applicants. This evaluation identified the most effective message types, offering key policy implications and insights into early-stage entrepreneurs' awareness and the entrepreneurial ecosystem. The researchers also revealed that cooperation with local communities and regional innovation centers is an important success of a local startup.

• Journal of the Korean Wood Science and Technology
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• v.46 no.1
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• pp.73-84
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• 2018

Recently, the importance of flame retardation treatment technology has been emphasized due to the increase in urban fire accidents and fire damage incidents caused by building exterior materials. Particularly, in the utilization of wood-based building materials, the flame retarding treatment technology is more importantly evaluated. An Intumescent system is one of the non-halogen flame retardant treatment technologies and is a system that realizes flame retardancy through foaming and carbonization layer formation. To apply the Intumescent system, composite material was prepared by using Ethylene vinyl acetate (EVA) as a matrix. To enhance the flame retardant properties of the Intumescent system, a nano-clay was applied together. Composite materials with Intumescent system and nano - clay technology were processed into sheet - like test specimens, and then a new structure of cross laminated timber with improved flame retardant properties was fabricated. In the evaluation of combustion characteristics of composite materials using Intumescent system, it was confirmed that the maximum heat emission was reduced efficiently. Depending on the structure attached to the surface, the CLT had two stages of combustion. Also, it was confirmed that the maximum calorific value decreased significantly during the deep burning process. These characteristics are expected to have a delayed combustion diffusion effect in the combustion process of CLT. In order to improve the performance, the flame retardation treatment technique for the surface veneer and the optimization technique of the application of the composite material are required. It is expected that it will be possible to develop a CLT structure with improved fire characteristics.

• Journal of Gifted/Talented Education
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• v.24 no.4
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• pp.629-655
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• 2014

This study aims to explore the characteristics of environmental catalysts which have affected the development of music giftedness of the disadvantaged students. For this purpose, this study deals with nineteen disadvantaged gifted in music and examines their self-evaluation test, personal statement, and interview. Based on Gagn$\acute{e}$'s environmental catalysts of differentiated model of giftedness and talent(DMGT), the analysis of the interviews conveys the milieu of the disadvantaged gifted hardly exerts positive influences on their musical activities and studies. While concerning music and supporting their children financially and emotionally, parents unintentionally tend to exert negative influences on their children for their misapprehension of giftedness and incompetent advice. On the whole, the disadvantaged gifted hardly admit their teachers as experts in music. In relation to provisions, most students participate in extra school and local program and none of them participates in music gifted program. They are not satisfied with the quality in education. Despite the importance of the events such as crystallizing experience, award-winning, and performance, most students don't have enough events for inspiring their giftedness. As a conclusion, this study gives a proposition for a strategy to improve the environmental catalysts for the disadvantaged gifted in many different ways: the improvement of social recognition, the enhancement of parent consulting and teachers training programs, and the development and diffusions of more qualified gifted programs and so on.

• Research in Community and Public Health Nursing
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• v.11 no.1
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• pp.37-66
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• 2000

Volunteers activities in Health Centers are strategically important for the efficient utilization of human resource and local people's health promotion in community. With these backgrounds. this study is conducted to examine significant factors in relation to demand and utilization of volunteers in Health Centers. and the factors are the characteristics of Health Centers. volunteer management factors and external environment factors. Subjects in this study were 245 Health Centers all chosen. Data were collected from April. 12. 1999 to May. 31. 1999. and the data for analyses were ones of 116 respondents. Then. the data coded and submitted to Fisher's exact test. NPAR1WAY ANOVA, Correlation analysis. multiple regression analysis, multiple logistic regression analysis with SAS program. The key results from this study can be epitomized as follows: 1. 43.1% of responding health centers answered that they 'utilize volunteers'. The average number of volunteers who were engaged in responding health centers was 43, out of which 7 were men and 36 were women. As for the adequacy of the number of the volunteers. 55.1% responded 'not enough' and 30.6% responded 'adequate'. The more the number of volunteers needed. the more the number of utilizing volunteers is. When asked about their views concerning the utilization of volunteers in Health Centers. 88.7% of all respondents answered in the affirmative. The accountable factor for the utilization of volunteers was the present utilization of volunteers. 2. Concerning the reasons for using volunteers. 'to induce local people's participation in health services' was the highest comprising 76% of the responding health centers. 3. Most of volunteers were housewives and independent enterprisers. The most type of volunteer activities was 'just simple labor'. 4. As for the action duration of volunteers. 69.4% answered 'under 6 months'. The factor was significant difference with the action duration of volunteers was 'to provide social meeting' in the middle of rewards for volunteers. 5. Asked about the problem in utilizing volunteers. 53.2% answered 'the difficulty of recruitment and education for volunteers'. and 42.6% answered 'lack of budget and manpower needed for the utilization of volunteers.' 6. Concerning the evaluation of the performance by volunteers. 88% answered 'satisfactory'. With regards to the reason for that. 29.3% answered 'volunteers can provide various kinds of services' 7. 88.7% of responding health centers answered that they will continuously or newly utilize volunteers in the future. 8. The main health program services which expect utilization of volunteers were visiting health services(63.2%). old people's health services (25.3%). These were not significant difference with any explanatory variable. 9. The average number of volunteer needed in responding health centers was 38. The more the average number of utilizing volunteers. the more the number of volunteers needed is. The more the degree of financial independence. the more the number of volunteers needed is. In conclusions. Health centers are necessary to promote their role of recruitment. education and training for volunteers. the development of volunteer activities programs.

• Korean Journal of Optics and Photonics
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• v.15 no.6
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• pp.511-518
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• 2004

Providing marine signal lanterns with advantages of little weight as well as large aperture, a Fresnel lens has been adopted to transfer the beam from the lanterns up to 10 nautical miles (18.53 km). A Fresnel lens with the diameter of 250 mm and 300 mm was designed by a lens design program and optimized by adjusting the groove parameters of the lens. The angular luminous intensity distribution (ALID) of this lens was calculated by using an illumination analysis program considering the ALID of a light bulb. At the best alignment of the bulb, the maximum luminous intensities (MLI) of the lantern were 1000 cd (in the case of 250 mm diameter) and 1300 cd (in the case of 300 mm diameter). These are more than the critical value of 720 cd that is the Korean Standard of MLI for the marine lantern. The ALID was investigated as a function of misalignment from the lens focus to determine the tolerance of the alignment ranges.

• Journal of Korean Home Economics Education Association
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• v.32 no.4
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• pp.1-18
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• 2020

The purpose of this study is to improve media literacy through home economics education. To this end, in this study, developed were 10 teaching-learning plans, learning activity sheets, and teaching materials for the 'relationship' area, the core concept of the 2015 revised home economics curriculum, using the ADDIE method. Pre- and post-survey results after implementing the developed program showed statistically significant improvements in enhancing participants' ability to access media and critical understanding of media. Through this, also found was that the ability to express and produce one's own thoughts and feelings has improved. As a result of a qualitative analysis, it was found that students who participated in the class experienced an overall change in the performance goals of media literacy, especially in 'critical understanding and evaluation', and improved in media use ethics and social participation consciousness as well. It is significant that this study has developed a program that can foster media literacy in home economics education. It is expected to help improve the acceptability of media literacy education in home economics education, enhancement of the expertise of home economics teachers' media literacy education, and the improvement of teaching and learning activities in the field.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.4
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• pp.293-302
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• 2019

This study systematically analyzed computer-based driving intervention programs for seniors, to provide the academic background for driving intervention for seniors. Articles published from January 2009 till December 2018 were researched and analyzed. 'PubMed, Google Scholar, and Science Direct' were used to search articles published overseas, and 'RISS, KERIS, and KISS' searched for articles published in Korea. Based on the inclusion and exclusion criteria, totally 359 papers were retrieved, and 10 articles were finally analyzed; 8 articles (80%) were evidence level I, and 2 articles (20%) were evidence level III. Amongst the computer-based interventions, driving simulators (70%) were the most common, followed by two video image training (20%) and one Nintendo Wii program (10%). In most studies, driving simulators trained the cognitive and visual abilities of seniors and enhanced their abilities to cope with risk situations under various simulated circumstances. Other interventions were also reported to have a positive effect. For evaluating elderly drivers, the driving performance evaluation using a driving simulator was the most common; in addition, evaluations of attention, space-time ability, cognitive function, risk perception, depression and anxiety were also commonly used. We believe that it is appropriate to employ computer-based driving intervention programs for seniors to train and evaluate various domains. We expect that these interventions can be used as an effective tool for safe driving.