• 한국환경과학회지
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• 제33권3호
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• pp.193-203
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• 2024

This study aims to determine the factors affecting the level of satisfaction with the Cell Broadcast Service (CBS) among citizens in Incheon. Partial least squares (PLS) regression, instead of multiple regression, was used for the analysis because it can solve multicollinearity and sample size issues. The analysis results are as follows: The factor with the greatest effect on satisfaction with CBS among Incheon citizens, was the elimination of redundancies (VIP=1.185). Therefore, local governments, government agencies, and public organizations must coordinate their ideas and collectively create guidelines to eliminate redundancies. The second most influential factor was the expansion in the broadcast medium from legal, institutional, and policy aspects (VIP=1.087). This is because differences in generation, age, gender, and personal characteristics were not considered. Therefore, it is necessary to devise a customized messaging tool through the expansion of broadcast media. The broadcast criteria of the legal, institutional, and policy perspectives comprised the third most influential factor, with a high VIP value of 1.053. Consequently, it is essential to devise a plan to avoid distributing unnecessary cell broadcast services, by establishing criteria for areas and sections, time, and the direct and indirect impact zones of a disaster. In the future, this study could be used as base data to develop policies, guidelines, and response measures for Incheon CBS. Given the lack of research on the diverse characteristics of each social class and the city traits of each region, and a lack of concrete empirical research on each factor, continuous and in-depth studies are required in the future.

• 한국조리학회지
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• 제12권1호
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• pp.22-36
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• 2006

This study examines the job satisfaction of cooks of school feeding. Sampling was taken among school feeding cooks except for those of Kangwon Province and Cheju Province. The factors affecting on the job satisfaction was investigated to find ways to raise the job satisfaction of cooks of school feeding. Four factors were extracted in all. It is found that these four factors have affected the job satisfaction of cooks of school feeding in order of working satisfaction factor(.493), co-worker communication factor(.463), job environment factor(.185), and advancement factor(.146). Accordingly, more opportunities for career advancement should be offered to raise the job satisfaction among them, and the establishment of better work environment and the optimum staff are urgently needed.

• 한국직업건강간호학회지
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• 제19권2호
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• pp.150-158
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• 2010

Purpose: The purpose of this study was to investigate stress-coping level and to determine the significant predictor of nurses' stress-coping in schoolwork. Methods: This study was based on the questionnaire survey carried out among 340 nurses in schoolwork at Korea National Open University. The questionnaire included the general factor, schoolwork related factor, health related factor, work related factor, stress level and stress-coping level. The data were analyzed using descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient, and multiple regression analysis. Results: The mean score of stress-coping level was 2.23 (SD=0.27). Time for study, exercise, and work as well as stress on daily life and job stress were significant predictors of nurses' stress-coping level in schoolwork. Conclusion: Findings of this study can be an important resource to improve stress-coping strategies of nurses in schoolwork.

• Journal of information and communication convergence engineering
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• 제15권3호
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• pp.137-142
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• 2017

A general linearly constrained narrowband adaptive array is examined in the eigenvector space. The optimum weight vector in the eigenvector space is shown to have the same performance as in the standard coordinate system, except that the input signal correlation matrix and look direction steering vector are replaced with the eigenvalue matrix and transformed steering vector. It is observed that the variation in gain factor results in the variation in the distance between the constraint plane and the origin in the translated weight vector space such that the increase in gain factor decreased the distance from the constraint plane to the origin, thus affecting the nulling performance. Simulation results showed that the general linearly constrained adaptive array performed better at an optimal gain factor compared with the conventional linearly constrained adaptive array in a coherent signal environment and the former showed similar performance as the latter in a noncoherent signal environment.

• 전기학회논문지
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• 제56권1호
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• pp.41-47
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• 2007

Transmission Loss Factor (TLF) is one of the key factors affecting transmission pricing which should capture the intrinsic characteristics of competitive electricity markets and be amenable to the agreement of the market participants. This paper proposes a practical methodology which enhances the utility and applicability of TLF which is vulnerable to the choice of slack bus, computation methodologies, and incremental generation (or incremental load). The proposed methodology is demonstrated with a case study.

• 한국농공학회논문집
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• 제52권3호
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• pp.113-120
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• 2010

Reduction factor for installation damage required to calculate design strength of geogrid used in MSEW(mechanically stabilized earth wall) design is usually obtained in the field test simulating real construction condition. However, damages occurred in geogrid during backfill work are influenced by many factors such as polymer types, unit weight per area, backfill construction method and gradation of backfill material and field test considering these factors demand lots of time and costs. In this study, factors affecting installation damage are analyzed and empirical method to evaluate reduction factor for installation damage using maximum particle size in backfill material is suggested.

• 설비공학논문집
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• 제25권12호
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• pp.654-659
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• 2013

This paper presents a numerical optimization of louvered fins to enhance the JF factor in terms of the design parameters, including the fin pitch, the number of louvers, the louver angle, the fin thickness, and the re-direction louver length. We carried out a parametric study to select the three most important parameters affecting the JF factor, which were the fin pitch, number of louvers, and the louver angle. We optimally designed the louvered fin by using 3rd-order full factorial design, the kriging method, and a micro genetic algorithm. Consequently, the JF factor of the optimum model increased by 16% compared to that of the base model. Moreover, the optimum model reduced the pressure drop by 17% with a comparable heat transfer rate.

• ETRI Journal
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• 제37권5호
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• pp.1044-1054
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• 2015

The smart media (SM) industry has demonstrated that it has the characteristics to increase user innovative activities, enhance open innovativeness, and increase the segmentation of innovation value. This study introduces and evaluates an innovation system that reflects the characteristics of the SM industry. We categorize the SM industry into hardware, network, platform, and content industries and perform an AHP analysis (based on a survey of 96 experts) to evaluate the relative importance of the factors/factor groups affecting the creation of innovation. The results show that 'collaboration activity" is a more important factor than other innovation factor groups (financial support, R&D, policy environment, human resources) in the SM industry. The results also show that the important factors/factor groups differ by industry.

• 한국통신학회논문지
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• 제24권8B호
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• pp.1456-1463
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• 1999

본 논문은 한국표준과학연구원의 야외시험장에서 표준안테나법을 이용하여 안테나인자측정 시스템에 관하여 기술하고 주변 잡음이 안테나인자에 미치는 영향을 줄이기 위한 방법에 대해 논한다. 측정주파수의 범위는 30~1000 MHz이며, 모든 제어와 데이터 수집은 컴퓨터를 이용하여 자동화 하였다. 측정한 안테나인자를 나타내었고, 안테나인자의 총 측정불확도는 $\pm$1 dB 이다.

• 한국수학교육학회지시리즈A:수학교육
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• 제45권3호
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• pp.251-262
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• 2006

This study investigates 628 high school students' math dislike tendencies by their math achievement levels. The findings show that, firstly, as the sample students' math achievement level decreases, the number of dislike factors increase. Secondly, students' math dislike factors are differentiated by their math achievement levels. Math high achievers show high math disliking tendency by teacher factor. Middle achievers show high math disliking tendency by complex application and relation factors. Low achievers show high math disliking tendency by comprehension factor. Finally the math disliking factors affecting the level of math achievement are influenced by schools and grades that students' attend. While math disliking factors such as comprehension factor, teacher factor, affection factor are generally present among sample schools, exceptionally JS high school students(high achieving students) are only affected by mentality factor. In addition, mentality factor affects the second grade students only. The implications of the study argue that students' math disliking tendencies could be systematically reduced by paying attention to such dependent variables students' achievement levels, grade, school characteristics, and independent variables including teacher, application, mentality, comprehension, and affection.