• Journal of the Korean Mathematical Society
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• v.36 no.4
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• pp.699-705
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• 1999

Given a probability space and a subsigma algebra A, each measure equivalent to the probability measure generates a different conditional expectation operator. We characterize those which act boundedly on the original $L^2$ space, and show there are sufficiently many such conditional expectations to generate the commutant of $L^{\infty}$ (A).

• Journal of Korean Academy of Nursing Administration
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• v.10 no.4
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• pp.495-513
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• 2004

As this study is the descriptive research study that tries to present the basic data aiming to establish a role of nurses for the Community Welfare Center, by surveying the role expectation and the degree of role performance towards nurses for the Community Welfare Center that nurses for the Community Welfare Center and social workers recognize, it carried out the Questionnaire research targeting nurses who are working for the Community Welfare Center located in Seoul and social workers of institutions where nurses are working, and then analyzed the results, and the study results are as follows. Both the group of nurses and the group of social workers were highly recognizing the necessity and the importance of nurses for the Community Welfare Center, and expected that more effective services will be possible to be offered by means of that nurses do work for the Community Welfare Center. However, compared to the degree that social workers recognize a nurses specialty, the nurses thought that their specialty is not acknowledged in the Community Welfare Center, and even in case of duty friction between groups being felt while social workers and nurses are working together, nurses were experiencing further friction of duties. While nurses are well recognizing their roles, they are statistically and significantly recognizing the degree of role performance lower than expected, thus the difference between the role expectation and the role performance could be seen. Also, the group of nurses showed the higher role expectation towards nurses than the group of social workers, and in relation to roles of a counselor, referral resource, an advocator, an educator, a case manager, a and a coordinator, the degree of role expectation by the group of nurses is statistically and significantly higher than the group of social workers, thus it could be seen that there is difference in the expectation degree between both groups, as to a role of nurses for the Community Welfare Center. In particular, as to a role of universally medical services, the expectations between nurses and social workers showed mutual agreement, but in relation to a role of nurses for community in the more expanded sphere, social workers did not show a receptive attitude, thus it was indicating that there exists an element of role conflict. In relation to the role performance of nurses for the Community Welfare Center, nurses were feeling the disorder degree more than social workers, in all items of disorder factors, and there was difference in recognition between nurses and social workers, as to the priority of disorder factors. Because of, through this study, having been found the difference in recognition of role expectation, the degree of role performance, and a disorder factor between nurses and social workers, as to the nurses for the Community Welfare Center, it is required a study with a more diversified method on a role of nurses for the Community Welfare Center.

• Journal of Families and Better Life
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• v.23 no.3 s.75
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• pp.1-16
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• 2005

This study explored the elements, types, and determining factors of successful aging for the Korean elderly. In order to examine the expectations of the Korean elderly, a sample of 377 elderly aged 65 and over living in Seoul and Kyunggi areas was selected and interviewed. The elements of successful aging that the Korean elderly pointed out in the interviews were: 'peaceful and comfortable life', 'self-maintenance,' 'secure social support,' and 'ostentation.' The expected elements of successful aging were further classified into three types of successful aging: 'idealized expectation.' 'self-centered expectation,' 'balanced self-other expectation.' The elderly groups sorted by the types exhibited significant differences in terms of demographic characteristics, self-evaluated economic status, and self-evaluated health status. The variables that affected the expectations were age, level of education, marital status, gender, and self-evaluated health condition. However, further analysis revealed that the factors that affected the expectation for successful aging were different for male and female elderly. The results suggest that the successful aging of Korean elderly should be understood in the context of Korean society and culture. The results could be used to better understand varied and unique life of Korean elderly, as well as in establishing a basis of intervention that meets the specific demands of the Korean elderly.

• The Journal of Asian Finance, Economics and Business
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• v.7 no.9
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• pp.649-657
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• 2020

This study aims to describe the perceptions of accounting students and expectations of employers towards the skills and knowledge needed by accounting graduates in Indonesia. Quantitative method using survey is employed to analyze 103 questionnaires from students and 51 questionnaires from employers. The results showed that students' perceived honesty, continuous learning, and work ethics are important skills, while employers stress the importance of work ethics, teamwork, and time management. Knowledge needed by accounting graduates in the perception of students includes financial accounting, financial reporting, and financial statement analysis, whereas employers perceived the importance of financial statement analysis, knowledge of Microsoft Office program, and financial accounting. Further analysis showed that there is an expectation gap between the perceptions of students and the expectations of employers towards skills - not knowledge - needed by accounting graduates. Although investigations of students' perceptions and employers' expectations have been conducted in previous studies, the information should be updated continuously to reflect the current conditions. This study offers the recent perceptions from students and employers to identify the current expectation gap. This study points to the importance of skills development in the university curriculum in order to develop the skillful human resources in accounting and meet the expectations of employers.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.34 no.4C
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• pp.397-402
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• 2009

Accurate estimation of time-selective fading channel is a difficult problem in OFDM(Orthogonal Frequency Division Multiplexing) system. There are many channel estimation algorithms that are very weak in noisy channel. For solving this problem, we use EM (Expectation-Maximization) algorithm for iterative optimization of the data. We propose an EM-LPC algorithm to estimate the time-selective fading. The proposed algorithm improves of the BER performance compared to EM based channel estimation algorithm and reduces the iteration number of the EM loop. We simulated the uncoded system. If coded system use the EM-LPC algorithm, the performance are enhanced because of the coding gain. The EM-LPC algorithm is able to apply to another communication system, not only OFDM systems. The image processing of the medical instruments that the demand of accurate estimation can also use the proposed algorithm.

• Research in Community and Public Health Nursing
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• v.12 no.3
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• pp.570-581
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• 2001

The purpose of this study was to analyze consumers' expectation. perception and satisfaction. The subjects in this study were 200 employees who were employed in a department store. They experienced nursing services from the primary care center at the department store. The results were as follows: 1. The rank of perceived significance of nursing services is tangibility, reliability, assurance, responsiveness. and empathy, respectively. 2. The rank of perceived service quality is empathy. responsiveness. assurance. reliability. and tangibility. 3. The rank of expectation and the rank of perception about nursing services are same. They are assurance, reliability, responsiveness, tangibility, and empathy respectively. 4. The regression analysis, which related the effect of perceived service quality to consumers satisfaction, had R2 value of 22.9%. From the above results, it can be concluded that the higher consumers' satisfaction can be explained by the greater perceived service quality.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.13 no.5
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• pp.2299-2318
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• 2019

Location-aware networks are of great importance for both civil lives and military applications. Methods based on line-of-sight (LOS) measurements suffer sever performance loss in harsh environments such as indoor scenarios, where sensors can receive both LOS and non-line-of-sight (NLOS) measurements. In this paper, we propose a data association (DA) process based on the expectation maximization (EM) algorithm, which enables us to exploit multipath components (MPCs). By setting the mapping relationship between the measurements and scatters as a latent variable, coefficients of the Gaussian mixture model are estimated. Moreover, considering the misalignment of sensor position, we propose a space-alternating generalized expectation maximization (SAGE)-based algorithms to jointly update the target localization and sensor position information. A two dimensional (2-D) circularly symmetric Gaussian distribution is employed to approximate the probability density function of the sensor's position uncertainty via the minimization of the Kullback-Leibler divergence (KLD), which enables us to calculate the expectation step with low computational complexity. Moreover, a distributed implementation is derived based on the average consensus method to improve the scalability of the proposed algorithm. Simulation results demonstrate that the proposed centralized and distributed algorithms can perform close to the Monte Carlo-based method with much lower communication overhead and computational complexity.

• Journal of the Korean Applied Science and Technology
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• v.40 no.4
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• pp.733-742
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• 2023

This study aims to investigate the mediating effect of outcome expectation in the relationship between strengths knowledge and career adaptability for nursing students. The participants of this study were 284 nursing students in three Universities in G City, J Province. Data analysis used descriptive statistics, t-test, ANOVA, Pearson correlation analysis. Also mediation analysis was performed according to the Baron and Kenny method and Sobel test.. Career adaptability is positively correlated with strengths knowledge(r=.61, p<.001), outcome expectation(r=.55, p<.001), and strengths knowledge is positively correlated with outcome expectation(r=.41, p<.001). The outcome expectation showed a partial mediating effect between the strengths knowledge and the career adaptability(Z=3.85, p<.001). The positive the strengths knowledge(𝛽=.44, p<.001), the higher the outcome expectation(𝛽=.33, p<.001), the higher the career adaptability level, and the explanatory power to explain career adaptability was 50%. Therefore, in order to improve the career adaptability of nursing students, it suggests that it is necessary not only to recognize strengths with positive thinking about individuals, but also to improve attitudes to form desirable outcome expectations at the same time.

• Management & Information Systems Review
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• v.17
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• pp.45-65
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• 2005

The purpose of this study is to contribute to a fundamental prevention of tax avoidance behaviors by individual businesses. For the purpose, this researcher surveyed factors surveyed individual business managers' disposition(type) of tax avoidance to determine factors influencing the avoidance, and proposed direction for further studies. Several hypotheses suggested here were verified to find that factors such as tax system, tax psychology, tax knowledge, social culture and the expectation of tax avoidance had effects on individual businesses' disposition of such avoidance. The multiple regression analysis made here showed that such factors as tax psychology, tax system and the expectation of tax avoidance affected the disposition of such avoidance and that the disposition was most influenced by tax system, followed by the expectation of tax avoidance and tax psychology in order. In conclusion, factors that have positive relations with tax avoidance, or tax burden and tax administration and those that have negative relations, or tax ethics and sanction are not helpful to preventing the avoidance. This is not consistent with previous results. Now behaviors of tax avoidance by individual businesses are prevailing and becoming more serious. In this sense, objective measurement devices should be developed to make possible further scientific studies about such behaviors. For the development, support by appropriate policies is needed.

• The Journal of the Korea Contents Association
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• v.8 no.5
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• pp.287-299
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• 2008

The purpose of this study is to analyze the statistical data to get the government to have positive recognition of education for middle-aged and aged people about provision for old age after retirement and present a model of policy direction of realistic elderly education for middle-aged and aged people and an ideal program for middle-aged and aged people in Korea. Such an empirical research obtained the following results. First, as for effects of recognition of the need of elderly education and the desire to participate in elderly education on provision for retirement, the need of elderly education and the desire to participate in elderly education were found to have effects. Second, as for effects of the level of retirement expectation on provision for retirement, new departure, career completion, and continuous expectation were found to have effects. Third, as for mediating effects of retirement expectation in terms of effects of recognition of the need of elderly education and the level of desire for participation, the need of elderly education has retirement expectation partly affect physical, psychological, and economic preparation. As for the desire to participate in elderly education, expectation of retirement had completely mediating effects on physical preparation and partly mediating effects on psychological and economic preparation. Fourth, the need of elderly education, the desire for participation, retirement expectation, and recognition of provision for retirement by general properties were found to have statistically significant results in terms of gender, age, occupation, and educational background.