• Proceedings of the KSMRM Conference
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• 2003.10a
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• pp.27-27
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• 2003

목적： 뇌내혈종이 발생한 경우 원인질환의 파악은 환자의 치료방법을 결정하는 데 아주 중요한 요소이다. 특히 악성 신생물에 의한 뇌내혈종의 발생을 파악하는 것은 초기 치료 방법의 결정 뿐 아니라 환자 예후의 결정에도 중요하다. 본 연구에서는 뇌내혈종 주위의 부종과 병변의 크기비를 이용한 원인질환 감별방법의 유용성에 대해 알아보고자 하였다.

• Journal of the Korean Society of Radiology
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• v.83 no.5
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• pp.1046-1058
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• 2022

The hippocampus is one of the most metabolically active regions of the brain; therefore, it may be affected by various acute disorders. This study aimed to introduce and categorize various acute conditions that can involve the hippocampus and explain the findings of MRI, especially diffusion-weighted imaging (DWI). Acute hippocampal disorders are divided into six categories: infection, inflammation, metabolic, ischemic, traumatic, and miscellaneous. In this study, patients were retrospectively reviewed based on clinical findings and MRI, especially DWI. All diseases had been confirmed clinically or pathologically. Many acute hippocampal disorders overlap with the clinical manifestations. Thus, it is necessary to categorize acute hippocampal lesions and understand their specific imaging findings for differential diagnosis.

• Journal of Satellite, Information and Communications
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• v.10 no.4
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• pp.101-106
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• 2015

In this paper, a shared band transmission, in which downlink signals from satellite to both earth station and user terminal are transmitted in the same frequency band, is considered. For proper operation of such shared band transmission, self-interference caused by the transmitted signal from its own transmitter should be cancelled and the desired signal from the other transmitter should be obtained. The self-interference is sent by its own transmitter and it can be easily regenerated with the estimated round-trip delay. In addition to this delay, non-linearity effects caused by power amplifiers at the earth station and satellite should be exploited. The proposed interference canceller divided into two parts: one is subtraction of the transmitted signal with delay and non-linearity effects, and the other is adoptive filter to suppressed the residual interference. Through computer simulations, the effectiveness of the proposed system is verified.

• Journal of Convergence for Information Technology
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• v.10 no.2
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• pp.193-200
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• 2020

This study proposes the Field Oriented Capacity Upgrade Program, an educational model for improving clinical practice of occupational therapy. The effectiveness of the self-directed learning ability and problem solving ability of students was compared by comparing the proposed educational model with the traditional teaching method. The research method was divided into the experimental group who participated in the model education and the control group who participated in the lecture class, and conducted similar experimental studies using the nonequivalent control group pretest-posttest design. In addition, the study participants conducted a preliminary and follow-up survey of a total of 135 students who participated in the education over three semesters. As a result of training using the proposed learning method, the experimental group improved self-directed learning ability and problem solving ability by 22% and 18%, respectively, compared to the control group. This study developed and proposed a new teaching-learning method to improve clinical practice of occupational therapy, and it is meaningful as a basic data of teaching-learning method to improve the ability required in various jobs.

• Korean Journal of Culture and Social Issue
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• v.21 no.3
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• pp.481-496
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• 2015

The purpose of this study was to search for empirical evidence between internalized shame with self-control, aggression, and addiction potential. Also examine the differences between clinical group and normal group. The data was collected from 100 AA participants and 380 Non-AA participants. For measuring each variable, internalizes shame scale(ISS), self-control rating scale(SCRS), Buss-Durkee Hostility inventory(BDH), addiction potential scale(APS) were used. The survey result was analyzed with Pearson Correlation, Partial correlation and t-test. The results shows: Frist, the internalized shame and the aggression, the addiction potential shows a positive correlation but the self-control shows negative correlation. Second, after control self-control, internalized shame positively correlate to addiction potential and aggression. Third, clinical group recorded a higher level in internalized shame, aggression and addiction potential than normal group; a lower level in self-control. Based on the finding, the implications of understandings, the interventions, the limitations of this study, and the suggestions were discussed.

• Proceedings of the KIEE Conference
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• 2002.07c
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• pp.1407-1409
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• 2002

BiPbSrCaCuO계 초전도 소결체에 산화은을 첨가하여 자기 부양 효과를 나타나는 시료의 제작 조건을 조사하였다. 2%의 산화은이 첨가된 시편에서 자기 부양 효과가 가장 효과적으로 관측되었다. toroidal자석에서 관측되는 자기 부양 효과는 자석의 중심부분에서만 발생하며, 자석의 ring부분에서는 관측되지 않았다. 이 결과는 본 연구의 자기 부양 효과의 발생에는 자석의 형상 및 자속의 분포 형태와 밀접한 관련성이 있음을 의미한다. 자기 부양 효과에 관한 측정 결과로부터 자속 밀도가 극소가 되는 장소에 초전도체가 놓이게 되면 초전도체는 반자성효과로 인하여 초전도체의 상하로부터 작용하는 자기력을 받게 된다. 또한 산화은을 첨가하지 않은 BiPbSrCaCuO계 초전도체와 2%의 산화은이 첨가된 시편의 자기부양 효과를 조사한 결과 pinning center의 역할이 중요함을 알 수 있다.

• Proceedings of the Costume Culture Conference
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• 2003.04a
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• pp.94-96
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• 2003

성에 따른 역할 분화는 사회적 행동의 가장 보편적인 결정적 요소이다. 모든 사회는 남성과 여성에게 서로 다른 의무와 기대를 부여한다. 이러한 의미 부여에 대한 구체적인 제한들은 문화에 의해 결정된다. 문화에 의해 결정된 성 역할은 그 사회 구성인으로서 적합한 복식 형태를 요구하거나 적어도 제안하게 된다. 현대의 복식은 자기중심적인 주장이 강하기 때문에, 남과 다르게 개성적으로 의복을 소화해내느냐에 초점이 맞추어져 있다. (중략)

• Journal of The Korean Association of Information Education
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• v.16 no.1
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• pp.33-40
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• 2012

The purpose of this study is to find the relationship of academic self-efficacy, motivation, computer learning attitudes on the learning through game making activity. Through this study, it was confirmed structural relationship of the variables for learner's participant and academic goal achievement in learning with digital games. The structural equating model in this study, also indicates that academic self-efficacy, which was consisting of assignment level, self-efficacy, confidence affects meaningfully on motivation and computer learning attitudes. It is important factor that Learner's attitudes for the task and regulate of learning process in learning with digital games, which was focused on learning by doing.

• The Journal of the Convergence on Culture Technology
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• v.6 no.1
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• pp.269-278
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• 2020

The purpose of this study is to verify the effectiveness of problem-based learning on self-directed learning ability and learning flow of junior college students. The study was conducted on 248 students from five departments who participated in the faculty learning community program, which was supported by the Center for Teaching and Learning Development at D University in Busan. The effectiveness of the survey conducted before and after the application of the problem-based learning method was examined to show statistically significant changes in both self-directed learning ability and learning flow. A survey on satisfaction with the problem-based learning method showed that 66.2% of all students were satisfied with their classes overall, and 64% of the respondents said that the problem-based learning method helped them understand the course, which allowed them to verify the effectiveness of the study method. This research is meaningful in that it can be used as a basic data for the search for learner-centered education methods required by the era of the fourth industrial revolution.

• Journal of the Korean Magnetics Society
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• v.9 no.1
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• pp.7-16
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• 1999

Stoichiometric and nonstoichiometric $Y_{3-x}Fe_{5+x}O_{12})$ polycrystalline samples (x=0.00, 0.05, 0.10, 0.30, -0.05, -0.10, -0.30) were prepared by solid state reaction method. The magnetic properties of the sample were investigated by FMR (ferromagnetic resonance) technique at microwave frequency 5.11 GHz (G-band) and 23.39 GHz (K-band) respectively. The spectroscopic splitting factor g were estimated to be 2.04~2.35 from the derivative absorption lines. As the samples became yttrium $(Y^{3+})$ excess and iron $(Fe^{3+})$ excess, Magnetizations were decreased. But resonance linewidth were increased. To investigate the anisotropy, the angular dependence of resonance magnetic fields were measured. Angular dependence of effective magnetizations were measured by FMR from 77 K to 300 K at K-band microwave frequency (23.39 GHz) and the saturation magnetizations were measured by VSM. The Bloch coefficients B and C were determined by fitting. $M_{eff}(0)$ was obtained by the extrapolation from 80 K. From this result, the spin wave stiffness constant D $(about\; 162~206 \;eV{\AA}^2)$and average square range of exchange interaction $$$(about \;5.84~12.13\;{\AA}^2)$ were determined.