• 한국전자파학회논문지
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• 제29권12호
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• pp.969-975
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• 2018

추적 레이다의 주요 기능은 목표물을 자동으로 추적하는 기능이다. 추적 레이다 중 진폭비교 모노펄스 레이다의 추적 원리를 이용하여 목표물의 각도를 추정할 수 있다. 목표물의 각도를 추정할 때 발생되는 잡음을 고려하여, 각도 오차 검출을 통해 동작하는 진폭비교 모노펄스 레이다의 성능을 분석하고자 한다. 또한 Taylor 전개 기반 근사로 얻은 추정값을 이용하여 진폭비교 모노펄스 레이다의 추정 성능을 예측할 수 있다. 이를 위해 본 논문에서는 진폭비교 모노펄스 레이다의 성능을 Mean Square Error(MSE) 오차로 정량화하여 해석한다.

• International Journal of Advanced Culture Technology
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• 제12권3호
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• pp.80-87
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• 2024

The aims of this study were to introduce cultural teaching procedures and propose cultural comparison activities as a practical method of cultural learning. It also analyzed learners' attitudes toward cultural learning through the aforementioned activities and examined considerations for holding cultural classes in the future. The research involved conducting a class underlain by four stages: warm-up, a cultural item comparison activity, wrap-up, and opinion submission. Data were collected through self-opinion journals and open-ended questionnaires, after which they were qualitatively analyzed. The results showed that the learners were highly satisfied with cultural learning through cultural comparison activities (73.7%) because of the efficiency of such a learning method, opportunities for proactive learning through interaction, increased interest and motivation, and the fact that it helps them understand their own cultures. We need to develop activities that enable learners to participate in a variety of ways through the mutual exchange of opinions when planning cultural classes. Pedagogical implications for integrated language and cultural classes are provided.

• 가정과삶의질연구
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• 제26권4호
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• pp.73-83
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• 2008

This study examines the effects of mass media, the tendency for young women to make body comparisons, and the BMI of female high school and college students on their attitudes about eating. Participants were 392 high school students from Gyeonggi Province and 391 college students from Seoul, Gyeonggi and Chung-nam Province. Collected data were analyzed through Cronbach's ${\alpha}$, t-test, One-way ANOVA, $Scheff{\acute{e}}$ test, Pearson's correlation, and stepwise multiple regression. The findings of the study were as follows: 1) While mass media influence differed by grade, tendency for appearance comparison and attitude toward eating did not differ by grade. 2) Mass media influence, tendency for appearance comparison and attitude toward eating differed by BMI. 3) Mass media pressure, specific attributes comparison, and BMI were significant predictors of attitudes toward eating. 4) Tendency for appearance comparison played a mediating role in the relationship between mass media and attitudes toward eating.

• 한국경영과학회지
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• 제30권2호
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• pp.185-199
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• 2005

With the growth of internet shopping malls, there is increasing interest in comparison shopping mall. However most comparison sites compare only book prices by collecting simple XML data and do not provide .the exact comparison Including precise shipping costs. Shipping costs vary depending on each customer's address, the delivery method, and the category of selected goods, so rule based system is required in order to calculate exact shipping costs. Therefore, we designed and implemented comparison shopping mall which compares not only book prices but also shipping costs using rule based inference. By adopting the extensible Rule Markup language (XRML) approach, we proposed the methodology of extracting delivery rules from Web pages of each shopping mall. The XRML approach can facilitate nearly automatic rule extraction from Web pages and consistency maintenance between Web pages and rule base. We developed a ConsiderD system which applies our rule acquisition methodology based on XRML. The objective of the ConsiderD system is to compare the exact total cost of books including the delivery cost over Amazon.com, BarnesandNoble.com, and Powells.com. With this prototype, we conducted an experiment to show the potential of automatic rule acquisition from Web pages and illustrate the effect of delivery cost.

• Journal of electromagnetic engineering and science
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• 제15권4호
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• pp.224-231
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• 2015

A comparison of the antenna parameters for R-band (1.7-2.6 GHz) and S-band (2.6-3.95 GHz) standard gain horn antennas has been performed by the Korea Research Institute of Standards and Science (KRISS), together with seven domestic participants from private companies and public institutions. Its purpose, as a proficiency test program of the 'Antenna Measurement Club' of KRISS, was to check equivalences in antenna parameter measurements between KRISS and the participants, particularly in the R-/S-band, to support antenna manufacturers and end users in Korea. The measurement parameters of this comparison are the power gain, radiation pattern, and reflection coefficient of the traveling standards for R-/S-band pyramidal standard gain horn antennas. The comparison used a gain comparison method and an extrapolation method to measure the power gain of the two traveling standards; the radiation patterns were measured in the far-field region of the transmitting and receiving antennas.

• 한국의류학회지
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• 제39권1호
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• pp.1-14
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• 2015

This study examines the effect of sociocultural attitude toward appearance and appearance comparison on appearance management behavior by adolescents. The study examines the differences of the effect relationships among the three variables according to adolescents' sex and school grade. The questionnaire was administrated to 575 middle school and high school students in Gwangju from September 2-8, 2011. Data were analyzed by descriptive statistical analysis, frequency analysis, factor analysis, reliability analysis, and regression analysis by SPSS for WIN program. The results were as follows. First, the sociocultural attitude toward appearance was composed of two factors: internalization and awareness. Adolescent's appearance management behavior was composed of four factors: hair and style, face, weight, and neatness. There are significant differences on sociocultural attitude toward appearance and appearance management behavior by gender, age (girl/middle, boy/middle, girl/high, boy/high). Second, the sociocultural attitude toward appearance significantly influenced appearance management behavior with significant differences among groups. Third, the sociocultural attitude toward appearance significantly influenced the appearance comparison and there are significant differences among groups. Fourth, appearance comparison significantly influenced appearance management behavior with significant differences among groups. Fifth, the sociocultural attitude toward appearance mediated by appearance comparison statistically did not influence appearance management behavior.

• 대한한의학회지
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• 제21권1호
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• pp.3-10
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• 2000

We experimented with several prescriptions in order to find cure and prevention effects for obesity. We fed control group rats a high fat diet and adiministered normal saline for 8weeks. We fed experimental group rats a high fat diet and administered extract of four prescriptions for 8weeks. The results were as follows; 1. The serum total cholesterol level in Bikam-whan and Chekamhanghyuluiyiin-tang group showed a significant decrease in comparison with Control group. 2. The serum triglyceride level in Bikam-whan, Chekamhanghyuluiyiin-tang and Chekambangpungtongseong-san group showed a significant decrease in comparison with Control group. 3. The serum free fatty acid level in Chekamhanghyuluiyiin-tang and Chekambohyulansin-tang group showed a significant decrease in comparison with Control group. 4. The serum total lipid level in Bikam-whan, Chekamhanghyuluiyiin-tang and Chekambohyulansin-tang group showed a significant decrease in comparison with Control group. 5. The serum phospholipid level in Bikam-whan and Chekamhanghyuluiyiin-tang group showed a significant decrease in comparison with Control group. 6. The serum glucose level in Bikam-whan and Chekamhanghyuluiyiin-tang group showed a significant decrease in comparison with Control group. According to the above results, Bikam-whan and Chekamhanghyuluiyiin-tang has shown to be capable of curing and preventing obesty.

• 가족자원경영과 정책
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• 제11권4호
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• pp.1-20
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• 2007

The purpose of this study was to identify the criteria of evaluating a price-comparison website, and to investigate the consumers' perceived importance and satisfaction of each criterion. Also, it compared both the importance and satisfaction levels based on consumers' socio-economic and Internet-usage characteristics. Data for this study came from a questionnaire completed by consumers (n=417), who had used the price-comparison website, and were analyzed through factor analysis, t-test, and ANOVA. The findings of the study were as follows: First, the evaluation criteria of the price-comparison website were categorized into five variety of information, accuracy, convenience, credibility, and the website system. Second, convenience of searching information was seen by consumers as both the most important and most satisfactory criterion. Variety of information was also considered important. For most of the evaluation criteria, the level of consumers' satisfaction was significantly lower than the level of consumers' recognized importance. Third, consumers in their 20s, students, and housewives were less likely to be satisfied by the price-comparison website overall. Older people were less likely to be satisfied with the convenience of the website, and the higher-income group was less likely to be satisfied with the variety of information on hand.

• 한국정밀공학회지
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• 제18권12호
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• pp.110-115
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• 2001

In this paper, a multiple comparison was proposed to minimize the amount of coolant. And new coolant level, called "low level", was suggested to show usefulness of multiple comparison for experiments. The amount of this levee is about 1/4 of conventional coolant amount-called "high level", and dry cutting is called "none level". Using these coolant levels, the cutting temperatures of each coolant level in turning process were analyzed by analysis of variance(ANOYA)-test and a multiple comparison. As the result of ANOVA-test, we have just known that the average of temperature of each coolant level is not equal. However by Tukey's HSD, one of multiple comparison. it was analyzed that the average of temperature of low level is similar to that of high levee and different from that of none level.erent from that of none level.

• 대한본초학회지
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• 제28권3호
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• pp.33-38
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• 2013

Objectives : The present study has been undertaken to investigate the effects of Carthami Semen and Jogyeongjongok-Tang on pregnant rats. Method : In this experiment, the pregnant rats were administered by water extracts of Carthami Semen and Jogyeongjongok-Tang. The levels of weights, ALT, AST, ALP, BUN, creatinine, progesterone, Na and K in serum and reproductive indices of the rats were measured after treatment. Results : The levels of body weight gains were not significantly changed in comparison with Control group in Carthami Semen group and Jogyeongjongok-Tang group. In the levels of reproductive indices of the rats, the number of corpora lutea, implantation and viable fetuses, post-implantation loss, fetal weight and placental wight were not significantly changed in comparison with Control group in Carthami Semen group and Jogyeongjongok-Tang group. But pre-implantation loss was significantly increased in comparison with Control group in Carthami Semen group. The levels of BUN, creatine, ALT, AST and ALP were not significantly changed in comparison with Control group in Carthami Semen group and Jogyeongjongok-Tang group. The level of progesterone was not significantly changed in comparison with Control group in Carthami Semen group and Jogyeongjongok-Tang group. The levels of Na and K were not significantly changed in comparison with Control group in Carthami Semen group and Jogyeongjongok-Tang group. Conclusion : Reviewing these experimetal results, it appeared that Carthami Semen and Jogyeongjongok-Tang had not toxicity on pregnant rats.