• The Journal of Information Systems
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• v.14 no.3
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• pp.117-122
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• 2005

This paper presents a method for detecting scene changes in video sequences, in which the $chi^{2}$-test is modified by imposing weights according to NTSC standard. To automatically determine threshold values for scene change detection, the proposed method utilizes the frame differences that are obtained by the weighted $chi^{2}$-test. In the first step, the mean and the standard deviation of the difference values are calculated, and then, we subtract the mean difference value from each difference value. In the next step, the same process is performed on the remained difference values, mean-subtracted frame differences, until the stopping criterion is satisfied. Finally, the threshold value for scene change detection is determined by the proposed automatic threshold estimation algorithm. The proposed method is tested on various video sources and, in the experimental results, it is shown that the proposed method is reliably estimates the thresholds and detects scene changes.

• Journal of Technologic Dentistry
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• v.33 no.4
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• pp.479-493
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• 2011

Purpose: The career education of the college student needs a new awareness. This research provides fundamental data from analyzing necessities of student's career education according to plans of a career education. Methods: Make use of SAS 8.0 of windows and descriptive statistics analysis on investigate Dental Technology 570 students in Daegu. And also it analyzes difference of ispectable t-test and ANOVA. Results: According to a gender, a job experience, where they are come from, there is a meaningful difference of an information and an entrance motive for choosing a major (<.05). The time of choosing the major are different meaningfully (<.001). An awareness about the method of a career achievement is a meaningful difference between men and women(<.05). As getting old, the method of a career achievement is higher and there are meaningful differences according to a grade, job experience and a entrance screening(<.01). In accordance with a gender, a grade, entrance screening, there are meaningful differences of a degree for obtaining the career information activities(<.01). In accordance with an age, when they choose a major, there is a difference(<.001). In accordance with a gender and a age, there are meaningful differences of a career plan(<.001). The age difference is slight. In accordance with a gender and a age, there are meaningful differences how to effort for the career(<.001), and also according to an entrance screening, an entrance motive(<.05). These mean that the first priority for choosing the career and going into the world is a school record. There are meaningful differences of people that the student choose for consulting the career(<.01). According to the job experience there are meaningful differences(<.001). Conclusion: By investigating and analysing the student's career plan, we need to seek how students choose their career reasonably and desirably. And also we need to teach a career education systematically.

• The Journal of Korean Society for School & Community Health Education
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• v.1 no.1
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• pp.83-93
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• 2000

The purpose of this study were to suggest the method of sex education by designing and implementing multimedia program about sex education, to search the efficiency between a teaching using multimedia program and a teaching of traditional method. To put above aims into practice, these were required : 1. are there any differences in the alteration of sex attitude according to teaching methods. 2. are there any differences in the completion of sex knowledge according to teaching methods. 3. are there any differences in the alteration of sex attitude according to learning level and teaching methods. 4. are there any differences in the completion of sex knowledge according to learning level and teaching methods. 5. are there any differences in the alteration of sex attitude according to sex and teaching methods. 6. are there any differences in the completion of sex knowledge according to sex and teaching methods. To carry out a reseach for this purpose, the subjects for this study were 160 sixth grade students from 2 elementary schools in Pu-Chun, Kyung Ki. The tools for study were two kind of questionnaires: sex knowledge test, sex attitude test. Each test consists of 20 items. Collected data was analysed with t-test by means of SPSS program. The main results of this study are as follow: 1. The Alteration of sex attitude according to teaching methods. There was a significant difference among teaching methods(P<.001). a teaching using multimedia program was more efficient than a teaching of traditional method in the alteration of sex attitude. 2. The Completion of sex knowledge according to teaching methods. There was a significant difference among teaching methods(P<.001). a teaching using multimedia program was more efficient than a teaching of traditional method in the completion of sex knowledge. 3. The Alteration of sex attitude according to learning level and teaching methods. There was a significant difference among teaching methods in the superior class. a teaching using multimedia program was more efficient than a teaching of traditional method in the alteration of sex attitude(P<.001). However, there was not a significant difference among teaching methods in the inferior class(P>.05). 4. The Completion of sex knowledge according to learning level and teaching methods. There was a significant difference among teaching methods in the superior class. a teaching using multimedia program was more efficient than a teaching of traditional method in the completion of sex knowledge(P<.001). Also, there was a significant difference among teaching methods in the inferior class. a teaching using multimedia program was more efficient than a teaching of traditional method in the completion of sex knowledge(P<.001). 5. The Alteration of sex attitude according to sex and teaching methods. There was a significant difference among teaching methods in the man class. a teaching using multimedia program was more efficient than a teaching of traditional method in the alteration of sex attitude(P<.01). However, There was not a significant difference among teaching methods in the woman class(P>.05). 6. The Completion of sex knowledge according to sex and teaching methods. There was a significant difference among teaching methods in the man class. a teaching using multimedia program was more efficient than a teaching of traditional method in the completion of sex knowledge(P<.001). Also, there was a significant difference among teaching methods in the woman class. a teaching using multimedia program was more efficient than a teaching of traditional method in the completion of sex knowledge(P<.05).

• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.1239-1243
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• 2005

A multipath mitigation method using the fault detection and isolation technique is proposed for the CDGPS. The base station is assumed to be immune to the effect of the multipath. With this reasonable assumption, the effect of multipath in moving station is mitigated. For that, the double difference measurement is produced, and then another additional difference between code pseudorange and acclumulated carrier phase is calculated. The test statistic is constituted with those differences. The hypothesis testing is applied to that test statistic. The proposed test statistic makes use of the effect of multipath in code pseudoranges and it does not use time differences. Therefore the detection ability for multipath is improved in most environments. However, the increased number of differences makes the measurement noises larger. The performance of the method is compared with that of the conventional parity space method with code pseudorange.

• The Journal of the Convergence on Culture Technology
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• v.5 no.2
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• pp.147-155
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• 2019

The purpose of this study is to analyze the difference between female nurse and male nurse in female nurse by applying the phenomenological method of Colaizzi which is one of the qualitative research methodology and to analyze the difference between female nurse and male nurse. What is the difference between a male nurse and a female nurse perceived by a female nurse? This study investigated the differences between female nurses and male nurses with research problems. The participants in this study were 13 female nurses who agreed to participate in the study after explaining and understanding the purpose of the study. The recruitment of the subjects was applied by the snowball method. As a result of this study, five categories were found. The categories were different in clinical tasks, the burden of family economic life, differences in interpersonal relationships, differences in nursing organization, and differences in unknown areas. The results of this study can be used as teaching materials and research data to expand the understanding of difference between male nurse and female nurse.

• Journal of the Korean Society for Library and Information Science
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• v.18
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• pp.277-325
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• 1990

The purpose of this study was to determine the effectiveness of instructors' utilization of the reserve collection in the university library. To accomplish this, an experiment-and-questionnaire study was done by selecting an experimental group for whom the teaching method utilizing the reserve collection was used and a control group for whom the method was not used. An experimental group and a control group studied were as follows: (1) Students take the 'Comparative Politics' course in the Department of Political Science. (2) Students take the 'History of 'English Literature' course III the Department of English Language and Literature. The data to test the hypothesis were analyzed by SPSS/PC+ routine. The results are as follows: (1) There were significant differences between the experimental group and the control group in academic achievement(T(228)=6.69, P<.01). To investigate the difference in effect by major, the one-way analysis of variance was employed. According to the results, there were significant differences between the experimental group and the control group In the Department of Political Science and the Department of English Language & Literature. Therefore, students for whom the teaching method utilizing the reserve collection was used have higher academic achievement than those for whom the method was not used. (2) As for the degree of utilizing the library and its materials, there were significant differences between the experimental group and the control group(T(228)=8.87, P<.01). As for the results of the one-way analysis of variance to investigate the difference in effect by major, there were significant differences between the experimental group and the control group in both departments. As for the degree of utilizing library catalogues and bibliographical tools, there were significant differences between the experimental group and the control group(T (228)=8.55, P<.01). As stated earlier, the one-way analysis of variance to investigate the difference in effect by major has shown that there were significant differences between the experimental group and the control group in both departments. As for the degree of sincerity in doing homework and writing papers, there were significant differences between the experimental group and the control group(T(176)=8. 03, P<.01). To investigate the difference in effect by major, the one-way analysis of variance was again employed. According to the results, there were again significant differences between the experimental group and the control group in both departments. So, the students for whom the teaching method utilizing the reserve collection was employed used library catalogues and bibliographical tools much more than those for whom the method was not employed, and were more sincere in doing homework and writing papers. (3) There were also significant differences between the experimental group and the control group in degree of satisfaction in taking the course (T (228) = 6.61, P<.01). The results of the one-way analysis of variance to investigate the difference in effect by major was that there were significant differences between the experimental group and the control group in both departments. Therefore, the degree of satisfaction of students who were taught by the teaching method utilizing the reserve collection is higher than that of those who were not taught by the method. On the other hand, the responses of the experimental groups of two departments as to the degree of satisfaction with their teaching method was investigated. The result shows that students who took the 'Comparative Politics' course in a small class which employed the seminar method were higher in degree of satisfaction with the teaching method than students who took the 'History of English Literature' course III a large class which employed a lecture-oriented teaching method.

• The Korean Journal of Applied Statistics
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• v.25 no.6
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• pp.877-887
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• 2012

The Bank of Korea changed its method of GDP estimation from a fixed-weighted to a chain-weighted measure in 2009. The fixed-weighted method had had problems such as substitution bias and the rewriting of economic history. As a result of the change, annual growth rates calculated using the chain-weighted method from 1970 through 2008 turned out to be 0.8%p higher on average than the existing rates. The quarterly average chain-weighted growth rates were 0.19%p higher than the fixed-weighted ones, but they changed in the same directions. In this paper we analyze whether the differences in rates between the two calculation methods would bring about a difference in the cyclical characteristics of GDP. We conclude that although there were differences in growth rates after introduction of the chain-weighted method, there was no difference in the cyclical fluctuation.

• Culinary science and hospitality research
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• v.6 no.1
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• pp.103-121
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• 2000

All the food including Korean food is made by boiling preparing raw materials food. and to know how to cook correctly is the basis to cook delicious food. For mankind, finding out fire was the source of enormous change in the development of food culture. I have investigated the difference in cooking Korean style & Western style, by using fire, and known that there is a little difference between two methods except for cooking method by food. Preferably there is a wide difference by combinations of raw materials and cooking method.

• Information Systems Review
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• v.18 no.1
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• pp.25-39
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• 2016

This study suggests a case for people who are unfamiliar with data analysis to equip them in using big data easily without complex programming tasks. Consequently, we investigate whether a food-themed TV program influences the number of delivery food orders with the use of the difference-in-differences method. Results show that the number of delivery food orders significantly increased after broadcasting four of five food-themed TV program episodes, each of which focuses on a particular delivery food. This study contributes to the existing literature by presenting the possibility that food-themed TV programs can positively affect not only the broadcast delivery food stores but also the entire delivery food business. In addition, this study provides practical contributions by recommending a big data analysis methodology that can be easily employed by many people.

• Journal of the Korean Mathematical Society
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• v.44 no.6
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• pp.1397-1415
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• 2007

We consider an inverse heat conduction problem(IHCP) in a quarter plane which appears in some applied subjects. We want to determine the heat flux on the surface of a body from a measured temperature history at a fixed location inside the body. This is a severely ill-posed problem in the sense that arbitrarily "small" differences in the input temperature data may lead to arbitrarily "large" differences in the surface flux. A semi-discrete central difference scheme in time is employed to deal with the ill posed problem. We obtain some error estimates which also give the information about how to choose the step length in time. Some numerical examples illustrate the effects of the proposed method.