• Journal of the Korea Institute of Information Security & Cryptology
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• v.18 no.5
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• pp.59-69
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• 2008

The purpose of this paper is to measure the level of difficulty of fingerprint database based on sample quality. This paper proposes distribution of a sample quality analyzer and a difference of sample quality analyzer to measure the level of difficulty. Experimental results demonstrate that there are stronger correlation between matching performance and level of difficulty based on difference of sample quality than other measure. Especially, level of difficulty based on OQ Block of MPQ co-occurrence matrix shows highest correlation with matching performance, and moreover it can predict the matching performance of unknown databases.

• Journal of Engineering Education Research
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• v.26 no.6
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• pp.3-18
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• 2023

The purpose of this study is to identify the difference between the current retention level and the required level of engineering students' career competency that they think they need based on their perceptions. Ultimately, the results of this study are used as basic data when designing the major/general education program and the curricular/extra-curricular career program. The task of this study is to identify the difference between the current retention level and the required level of engineering students' career competency. And based on this, it is to confirm the educational needs of engineering students for the career competency. For this purpose, literature research on career competency education in universities was reviewed in the theoretical background. Next, previous studies on career competency and sub-competence derived from career competency-related studies and detailed questions were analyzed. Based on this, an initial evaluation tool for career competency of engineering students was developed. Finally, through expert review, a career competency evaluation tool with a total of 43 items in 10 competency groups was developed. A career competency evaluation questionnaire was conducted for 197 engineering students who participated in the 2022 Engineering Education Festa, and as a result of the IPA analysis, 'global competency' was found to be the competency with the largest difference between importance and execution. Next, 'major job competency' and 'career development competency' appeared in order. Reflecting the results of this study, it is expected that mutually organic design of competency-based liberal arts curriculum and major curriculum that can cultivate global competency, major job competency, and career development capability will be carried out through learning activities and field practice.

• Health Policy and Management
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• v.22 no.2
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• pp.163-182
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• 2012

This study was performed to identify the difference of the area-based deprivation and the educational level on the cerebrovascular mortality in Korea. Data used in this study was obtained from the Death Certificate Data 2000 and the 2000 Census produced by Korean National Statistics(NSO). We classified the whole country into 246 areas based on the administrative districts. Then, the Standardized Mortality Ratio (SMR) in cerebrovascular disease was calculated according to the sex, education level and 246 areas. Its Predicted SMR was calculated by the Empirical Bayes Methods to reduce the variation of the SMR values. The area-based deprivation of 246 areas were measured using the modified Carstairs index in which the 5 indicators consisted of overcrowding, the unemployment ratio of men, the percentage of households classified low social class, the percentage of non home owners, and finally those houses lacking basic amenities. The correlation between the area-based deprivation and the SMR of the whole country and the correlation between the area-based deprivation and the SMR of each metropolitan cities or provinces was analyzed by the Pearson correlation analysis method. After classifying the deprivation of 246 areas into 5 levels, we performed the random intercept Poisson regression analysis after adjusting education level and age using Empirical Bayes Method to investigate the relationship between the 5 deprivation levels and the cerebrovascular mortality. The SMR was increased in lower education level. Each 246 areas had different values in SMR, Predicted SMR and area-based deprivation. The area-based deprivation and the SMR of the whole country was not correlated in both sexes. The education level of an individual was associated the risk of cerebrovascular mortality in men. The risk of cerebrovascular mortality increased with age compared to the reference(<30). The area-based deprivation was not associated with the risk of cerebrovascular in both sexes. The findings of this study suggest that the SMR had positive and negative correlations with area-based deprivation depending on the metropolitan cities or province. It also suggests that the individual education level and age were related with mortality and finally that the area-based deprivation was not associated to the cerebrovascular mortality in Korea.

• Journal of the Korean Home Economics Association
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• v.38 no.10
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• pp.181-197
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• 2000

The purposes of this study were to compare financial status of home-based family business with that of ensile family business, and to analyze the factors effected on financial status of both business groups. The sample consisted of 295 home-based family business and 418 ensile family business among self-employed household of 1998 Korea Household Panel Data, and analyzed into Frequencies, Percentile, t-test, $\chi$$^2$-test and Regression. The findings were as follows: First, in case of financial status of household, there was no significant difference between home-based family business and ensile family business. Second, in case of financial status of business, total sales amount and net profit of home-based family business were lower than those of onsite family business, however net profit to total sales ratio of home-based family business was higher than those of onsite family business. Third, the factors contributing to total expenditure to total income ratio of home-based family business were business owner's present economic perception, future economic expectancy and residence, while business owner's age, the number of children and of tamer, and residence were significant variables contributing to same ratio of onsite family business. The factors contributing to total asset to total debt ratio of home-based family business was only business owner's future economic expectancy, however factors affected on the counterpart were business owler's future economic expectancy and job type of family business. Fourth, the variables of sex, age, educational level of family business owner, job type and family type of family business were associated with net profit to total sales ratio of home-based family business, and sex, educational level of family business owner, job type of family business, and the number of employees were related to same ratio of the counterpart. In addition, educational level of family business owner, job type and residence were related with total sales to the number of employees ratio of home-based family business, and educational level of family business owner and job tape of family business were related to same ratio of ensile family business.

• Korean Journal of Clinical Pharmacy
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• v.32 no.4
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• pp.328-335
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• 2022

Background: Case-based learning (CBL) is becoming an important approach for improving interprofessional collaboration education. Previous studies have examined learners' satisfaction with interprofessional education (IPE) in medical institutions. However, there are few studies on the implementation of university-led CBL interventions and their direct effects on learning outcomes. The aim of this study was to evaluate the effectiveness of CBL interventions on changes in the participants' perception and knowledge acquisition ability. Methods: The CBL approach consisted of team-based case-based learning, self-directed learning, and post-feedback. It was conducted as a single course for pharmacy students in their 5th year in a university setting. Changes in the participants' perceptions and self-assessments of competence levels were evaluated using survey responses. The effect of the CBL intervention on knowledge acquisition ability was directly evaluated using the exam score. Results: The majority agreed or strongly agreed that team-based case-based learning, and self-directed learning helped them to improve their knowledge and skills to a higher level and to increase the self-assessment of competency level. The average score of knowledge acquisition ability (average score of 75.0, p=0.0098) was significantly higher in the CBL intervention group than the lecture-based learning intervention group (average score of 52.0). Conclusion: The participants positively perceived that CBL intervention helped them to effectively improve their knowledge and the self-assessment of competency level. It also enhanced knowledge acquisition ability. These data, based on the survey responses, suggest that it is necessary to implement CBL interventions in a university-led single professional education.

• Journal of Korean Society of Rural Planning
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• v.21 no.4
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• pp.177-186
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• 2015

The main objective of this study was to assess the applicability of IoT (Internet of Things)-based flood management under climate change by developing intelligent water level monitoring platform based on IoT. In this study, Arduino Uno was selected as the development board, which is an open-source electronic platform. Arduino Uno was designed to connect the ultrasonic sensor, temperature sensor, and data logger shield for implementing IoT. Arduino IDE (Integrated Development Environment) was selected as the Arduino software and used to develop the intelligent algorithm to measure and calibrate the real-time water level automatically. The intelligent water level monitoring platform consists of water level measurement, temperature calibration, data calibration, stage-discharge relationship, and data logger algorithms. Water level measurement and temperature calibration algorithm corrected the bias inherent in the ultrasonic sensor. Data calibration algorithm analyzed and corrected the outliers during the measurement process. The verification of the intelligent water level measurement algorithm was performed by comparing water levels using the tape and ultrasonic sensor, which was generated by measuring water levels at regular intervals up to the maximum level. The statistics of the slope of the regression line and $R^2$ were 1.00 and 0.99, respectively which were considered acceptable. The error was 0.0575 cm. The verification of data calibration algorithm was performed by analyzing water levels containing all error codes in a time series graph. The intelligent platform developed in this study may contribute to the public IoT service, which is applicable to intelligent flood management under climate change.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.4
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• pp.229-237
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• 2013

As demand for IT services increase, which are based on SOA and cloud computing, service level agreements (SLAs) have received more attention in the parties concerned. An SLA is usually a paper contract written in natural language. SLA management tools which are commercially available, implement SLAs implicitly in the application with a procedural language. This makes automation of SLA management difficult. It is also laborious to maintain contract management systems because changes in a contract give rise to extensive modifications in the source code. We see the source of the trouble is the existence of documentary SLAs (paper contracts) and corresponding executable SLAs (contracts coded in the procedural language). In this paper, to resolve the current SLA management problems we propose an active SLM (Active Service Level Management) system, which is based on the active SLA (Active Service Level Agreement). In the proposed system, the separated management and processing of dual SLAs can be unified into a single process with the introduction of active SLAs (ASLAs).

• Journal of the Korea Institute of Information and Communication Engineering
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• v.25 no.7
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• pp.923-929
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• 2021

TCP communication and packet communication require transmission control technology to ensure high quality and high reliability. However, in the case of real-time data transmission, an inefficient transmission problem occurs. In order to overcome this problem and transmit the packet reliability, in general, early congestion control using the buffer level as an index was used. Control of the congestion control point and the cancellation point is delayed because the point at which congestion is controlled is based on the buffer level. Therefore, in this paper, not only the buffer level indicator, but also the ideal buffer level, which determines the packet discard probability, is classified so that the transmission rate and buffer level that measure network congestion are close to the level above the optimal setting. As a result, it was shown that the average buffer level can be directly controlled by maintaining the average buffer level by the ideal buffer level set in the experiment to prove the proposed method.

• Journal of East-West Nursing Research
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• v.13 no.2
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• pp.92-106
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• 2007

Purpose: The purpose of this study was to examine nursing students' satisfaction level with PBL-based clinical practice, their autonomy, achievement motivation and what affected them in those regards in an attempt to lay the groundwork for providing more systematic and efficient clinical practice, Method: The subjects III this study were 138 nursing sophomores at J college who participated in PBL-based clinical practice, Results: They got a mean of 3.34, 3.83 and 3.83 in satisfaction level with the clinical practice, autonomy and achievement motivation respectively. In regard to the relationship of the satisfaction level to general characteristics including motivation of choosing the major and time for undergoing the clinical practice, the students who decided to major in nursing at their own option(3.61) were most contented with practice teaching(F=6.356, p<.01), and those who underwent the clinical practice after taking lessons(3.82) were most pleased with the content of the clinical practice (t=2.129, p<.05). Concerning connections between autonomy and general characteristics involving age, satisfaction with the major and time for the clinical practice, the students who were at the age of 22(3.92) valued themselves the most(F=3.003, P<.05). And those who found their major satisfactory (4.28) and undergo the clinical practice after taking lessons(4.37) respected others the most(F=3.133, p<.01). As to relations between achievement motivation and general characteristics, the students who were contented with their major(4.00) excelled the others who weren't in that aspect(F=6.038, p<.01). The satisfaction level with the clinical practice was positively correlated to autonomy (r=.328, p<.01) and achievement motivation(r=.476, p<.01). Conclusions: The findings illustrated that the nursing students expressed the satisfaction with the PBL-based clinical practice education. The older students who were 22 years old were more autonomous, and those who took part in the clinical practice after receiving theoretical instruction were more autonomous and more pleased with the practice. The students who found their major more satisfactory surpassed the others in autonomy and achievement motivation. There was positive correlation among the clinical-practice satisfaction level, autonomy and achievement motivation. There are some suggestions: Intensive research efforts should be directed into getting a profound grasp of PBL-based clinical practice education geared toward nursing students. The development of modules for PBL-based nursing clinical practice education was required. How to provide PBL-based theoretical education to nursing students should be studied.

• Proceedings of the KIPE Conference
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• 2011.11a
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• pp.3-4
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• 2011

This paper presents a survey of floating power supply based on bootstrap operation for three-level voltage-source inverters. The floating power supply for upper switches is achieved by the bootstrap capacitor charged during on-time of the switch underneath. Hence, a large number of bulky isolated DC/DC power supplies for each gate driver are reduced. The Pspice simulation results show the behavior of bootstrap devices and the performance of bootstrap capacitor voltage.