• 대한가정학회지
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• 제40권5호
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• pp.53-62
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• 2002

The purposes of this study were to examine: 1)the dimensions of online store attitude; 2)the differences in the online store attitude by product category and store type; and 3)the effects of online store attitude on store satisfaction and store loyalty. Data were obtained from an online questionnaire survey to 850 online shoppers who were randomly selected from the panel of an online survey agency, and 615 responses were analyzed. Factor analysis extracted 5 dimensions of store attitude including: process and security; service; promotion and presentation; price and quality; and merchandise. MANOVA revealed a significant difference in the price and quality factor by product category and store type. Multiple regression showed that the effects of price and quality, service, and process and security on store satisfaction were significant. Also, price and quality had a significant direct effect on store loyalty which was also affected by store satisfaction.

• 한국초등과학교육학회지:초등과학교육
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• 제31권3호
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• pp.311-320
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• 2012

The purpose of this study was to examine the effect of peer mentoring activity in elementary school. For this study, an experimental group was conducted for peer mentoring activity in science class. The mentoring team was organized by mento-mentee team according to the scores of science process skill and achievement. The objects of this study were the sixth grade of both an experimental group (28 students) and a control group (27 students) located in Incheon. The results of this study were as follows. First, the experimental group was shown more significant effect for improvement of science process skills than the control group (p<.05). As the result of analysis by groups, both of mento and mentee showed significant effect for improvement of science process skills. Second, the peer mentoring activity showed more significant effect for improvement of achievement (p<.05). As the result of analysis by groups, mentee showed significant effect for improvement achievement. But mento group didn't show significant effect. Third, the peer mentoring activity showed the effect for positive changes of scientific attitude. If matching the mentoring object effectively and conducting the classes applying peer mentoring activity based on the results of this study, it's expected to draw student' improvement of science academic, achievement and positive changes of scientific attitude.

• 한국과학교육학회지
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• 제28권2호
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• pp.180-185
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• 2008

본 연구의 목적은 초등 예비교사들을 대상으로, 과학에 대한 태도와 탐구 능력을 검사하여, 성별과 고등학교 때의 계열에 따른 차이점을 분석하고 과학에 대한 태도와 탐구 능력의 상관관계를 알아보는 것이다. 과학에 대한 태도 검사 도구는 SAS를 이용하였으며 탐구 능력 검사 도구는 통합 탐구 능력을 측정하는 TIPS II를 사용하였다. 연구 결과는 다음과 같다, 첫째, 초등 예비교사들의 성별에 따른 과학에 대한 태도와 탐구 능력은, 전체적으로 보아 유의미하지 않았으며 초중고 학생들을 대상으로 한 선행 연구들의 결과와 일치하지 않았다. 둘째, 초등 예비교사들의 고등학교 계열에 따른 과학에 대한 태도는 인문계열의 초등 예비교사들이 자연계열 초등 예비교사보다 긍정적이었으며 탐구 능력은 자연계열 초등 예비교사들이 부분적으로 우수하였다. 이러한 결과도 초중고 학생들을 대상으로 한 선행 연구 결과들과는 일치하지 않는 것이다. 셋째, 초등 예비교사들의 과학에 대한 태도와 탐구 능력은 유의미한 상관관계가 있었다. 하지만 초중고 학생들을 대상으로 한 선행연구와는 달리, 과학에 대한 태도의 특정 영역만이 탐구 능력과 유의미한 상관관계를 보였다. 이런 연구 결과들을 볼 때, 초중고 학생들을 대상으로 이루어진 선행 연구들의 결과를 초등 예비교사들에게 그대로 적용하는 것은 적절하지 못하며, 초등 교사 양성 기관에서는 교육 대상의 특수성을 고려하여 과학교육을 지도할 필요가 있다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.894-900
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• 2005

A new approach to the straightforward implementation of the unscented filter in a unit quaternion space is proposed for spacecraft attitude estimation. Since the unscented filter is formulated in a vector space and the unit quaternions do not belong to a vector space but lie on a nonlinear manifold, the weighted sum of quaternion samples does not produce a unit quaternion estimate. To overcome this difficulty, a method of weighted mean computation for quaternions is derived in rotational space, leading to a quaternion with unit norm. A quaternion multiplication is used for predicted covariance computation and quaternion update, which makes a quaternion in a filter lie in the unit quaternion space. Since the quaternion process noise increases the uncertainty in attitude orientation, modeling it either as the vector part of a quaternion or as a rotation vector is considered. Simulation results illustrate that the proposed approach successfully estimates spacecraft attitude for large initial errors and high tip-off rates, and modeling the quaternion process noise as a rotation vector is more optimal than handling it as the vector part of a quaternion.

• 벤처창업연구
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• 제10권4호
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• pp.167-175
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• 2015

본 연구에서는 창업시도성공과 실패, 과정에 대한 태도에 영향을 미치는 선행변수로 불확실성에 대한 인내력에 주목하였다. 불확실성에 대한 인내력은 그 정도에 따라 위험에 대한 인내력과 모호성에 대한 인내력으로 구분할 수 있다. 본 연구에서는 위험과 모호성에 대한 인내력이 창업시도성공과 실패 및 시도과정 자체에 대한 태도에 미치는 영향, 그리고 창업시도성공과 실패 및 과정에 대한 태도가 창업시도태도에 미치는 영향을 경로분석을 통해 살펴보았다. 경로분석결과, 위험에 대한 인내력은 창업시도실패태도에만 부(-)의 영향을 미치는 것으로 나타났다. 모호성에 대한 인내력은 창업시도실패태도에 부(-)의 영향을, 창업시도과정태도에는 정(+)의 영향을 미치는 것으로 나타났다. 가설과 마찬가지로 창업시도성공태도는 창업시도태도에 정(+)의 영향을, 창업시도실패태도는 창업시도태도에 부(-)의 영향을, 창업시도과정태도는 창업시도태도에 정(+)의 영향을 미치는 것으로 나타났다. 이러한 연구결과를 바탕으로 연구의 학문적 의의와 실무적 시사점 그리고 연구의 한계점을 제시하였다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국내학술편); Seoul National University, Seoul; 20-22 Oct. 1993
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• pp.799-804
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• 1993

In this paper, the scheme of combining the orbit correction and attitude control of a 3-axis stabilized satellite is suggested. Being coupled and complimentary, it is preferable to achieve the required orbit correction and the desired attitude control simultaneously. A solution of the probes simultaneous control of orbit correction and attitude of a satellite, is obtained by solving the two point boundary value problem numerically. The first-order gradient algorithm is used to solve the numerical problem. The simulation results show that the East-West station keeping process with the combined system of an orbit correction and an attitude control is satisfactory.

• 대한지구과학교육학회지
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• 제7권1호
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• pp.1-10
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• 2014

The purpose of this study is to introduce the science-play in the regular class, stimulate the student's curiosity, motivate them and take active part in their science class. To make an effective science class, we developed the science-play activity instead of experiments in the text, and applied it to the class. The experimental group has statistically meaningful results in the science process skills, expecially in subordinate elements such as observation, deduction, expectation, data analysis and assumption establishments(p<.01). However, the comparative group has no meaningful results in the science process skills. Though the average value of the science related attitude in the experimental group had only a little increase and had no statistically meaningful results, that in the comparative group has decreased during the same period. As for the experimental group, the science-play activities were repeated and their science related attitude has increased a little. Even though there were no meaningful statistic results(p>.05), the science-play activity was effective in the science related attitude. As a result of this research, it could be said that the science-play activity can improve the student's science process skills and the science related attitude, and the science-play program should be further developed and applied to make easy and effective science classes.

• 한국수학교육학회지시리즈A:수학교육
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• 제50권2호
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• pp.185-212
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• 2011

The purpose of this study is to analyze whether spreadsheet-used instruction can improve statistical thinking ability and attitude and also to identify what characteristics of statistical thinking is constructed. For this study, a subject of 2 classes were randomly selected among the 12 classes of the 11th grader in D high school and designated one class as the experimental group and the other class as the control group. Eight hours of the spread sheet-used instruction and the traditional textbook-oriented instruction had been carried out in each class. The research findings are as follows. First, the spread sheet-used instruction is shown to be more effective in enhancing statistical thinking than the traditional textbook-oriented instruction. Second, the spread sheet-used instruction is shown to be more effective in improving statistical attitude than the traditional textbook-oriented instruction. Third, students have shown the various characteristics of statistical thinking in the data descriptive process, data arrange-summary process, data representing process, and data analying process through the spread sheet-used instructions. Hence, the spread sheet-used instruction is recommended in teaching statistics.

• 한국치위생학회지
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• 제8권3호
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• pp.65-72
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• 2008

This study has collected 322 clinical dental hygienists working in Daegu and around Daegu, in order to investigate perceived value of work among dental hygienists and extent of organizational attitude and find relationship between these, and we can finds these conclusions as follows; 1. The total average point of perceived value of work is 3.36(5 is a full mark), and we could gain each points as follows; vision realizability 3.53, process efficiency 3.42, product usefulness 3.32, job significance 3.31, social recognition 3.23. 2. The total average point of organizational attitude is 3.13, and job satisfaction, organizational commitment are 3.14, 3.12 respectively. 3. Variables of perceived value of work related job satisfaction are social recognition, vision realizability, process efficiency,(Social recognition is the most effective variable, and next vision realizability, process efficiency are effective in the order named.)($R^2$=.24) and we could find that job satisfaction is proportion to perceived value of work, according to relationship of these variables. Variables of perceived value of work related to organizational commitment are also vision realizability, social recognition, process efficiency,(Vision realizability is the most effective variable, and next social recognition, process efficiency are effective in the order named.)($R^2$=.32) and we could find that organizational commitment is proportion to perceived value of work, according to relationship of these variables. According to these result, perceived value of work and organization attitude(job satisfaction, organizational commitment) of dental hygienists are affirmative. but to make their attitudes be more affirmative, the research about improving perceived value of work is needed. Especially, vision realizability and social satisfaction are very important variables at perceived value of work of dental hygienists.

• 한국과학교육학회지
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• 제16권3호
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• pp.249-259
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• 1996

The purpose of this study was to analyze relationships among science achievement, science process skills and affective perception of high school students. The affective perception was included attitude toward science and science anxiety in the study. The instruments were developed HARS and SAMS for this study. The subject was sampled 1,115 students by stratified cluster sampling method. The major findings of this study were as follows: The tendency to affective perception was investigated according to students variables. Atittude toward science was showed a negative perception on female than male, in rural area than city. Science anxiety was percepted highly on female than male, in rural area than city. Attitude toward science showed positive relations to science process skills, science achievement, but which showed negative relation to science anxiety. Science anxiety showed negative relations among science process skills, science achievement and attitude toward science. Structural relationships among affective perception, science process skills and science achievement were analyzed by effect size through the path analysis on the independent and dependent variables. By the results, it was indicated that there have significant direct effect not only affective perception influence on science achievement but also on science process skills in hypothesized model. Prediction of science achievement and science process skills were clarified to characteristics of the affective perception.Therefore, understanding about affective perception will be helpful to make the strategy of science teaching