• Journal of the Korean Chemical Society
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• v.43 no.2
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• pp.199-205
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• 1999

The electrochemical properties of PAN-PVDF-PEGME blend polymer electrolyte system are investigated and the physical properties are also measured with varying the content of PEGME. This PEGME partially reduces the crystallinity of PVDF. The ionic conductivities of the polymer electrolytes are about $10^{-3}S/cm$, which may be applicable to a constituent of lithium secondary battery. From the temperature dependence of ionic conductivity, it is suggested that the ionic conductivity increases with the PEGME content due to the fomation of effective ion-conducting path. The cation transference number reaches its maximum value for the electrolytes (SPE 2) with 10 wt% PEGME and then decreases for further increase of PEGME contnet. The electrochemically stable range of SPE 1 (without PEGME) is about 4.3 V, but SPE 2-4 (PAN-PVDF-PEGME system) is about 4.6 V. When these polymer electrolyte are used as electrolyte in rechargeable battery and the cell performances are tested, the discharge capacity increses with the amount of PEGME. Therefore, PEGME increases the ionic conductivity, extends the electrochemical stable range, and finally improves the discharge capacity of cell adopting the electrolyte system.

• Proceedings of the Materials Research Society of Korea Conference
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• 2002.05a
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• pp.56-56
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• 2002

• Proceedings of the Korean Society for Applied Microbiology Conference
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• 2004.06a
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• pp.230-235
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• 2004

• Proceedings of the Korean Society for Applied Microbiology Conference
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• 2003.06a
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• pp.141-142
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• 2003

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2005.11a
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• pp.290-294
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• 2005

의미적인 정보검색을 위한 시맨틱 웹에 대한 연구가 본격화되었다. 시맨틱 웹을 위한 핵심은 개념과 개념들 사이의 관계를 정의한 온톨로지이다. 온톨로지를 분석하고, 분석된 결과에 포함되어 있는 새로운 사실들을 추론하여 가능한 많은 결과를 이끌어 내는 것이 의미적인 정보검색의 기반이라 할 수 있다. 본 논문은 이러한 온톨로지에 정의된 개념들을 분석하는 범용적이고 빠른 파서와 파서를 통해 분석된 사실을 바탕으로 더욱 많은 새로운 사실을 추출할 수 있는 온톨로지 기반의 추론(Inference) 시스템을 설계하고 구현하였다.

• Proceedings of the Microbiological Society of Korea Conference
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• 1999.04a
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• pp.56.2-56.2
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• 1999

• Proceedings of the Zoological Society Korea Conference
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• 1999.10b
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• pp.229.2-229
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• 1999

No Abstract, See Full Text

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2005.11a
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• pp.203-206
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• 2005

차량 진단 기능이 탑재된 원격 서버, 제어 신호 중계 기능을 가진 휴대폰용 어플리케이션, 그리고 신호 변환을 위한 converting 보드를 사용하여 기존의 차량진단기(scanner)와 동일한 기능을 가지는 원격차량진단 시스템을 제안한다. 원격 서버에서 직접 차량 진단 기능을 수행함으로써 진단 이력에 대한 자동 관리가 가능하며 다양한 부가 서비스를 연계하여 제공할 수 있다. 또한 신규 차종에 대하여 원격 서버 프로그램의 변경으로 대응이 가능하므로 기존 방식처럼 신규 차종에 대한 개별 upgrade가 필요 없다. 제안한 방식은 저가의 진단 시스템 구축이 가능하므로 영업소에서만 사용되던 차량 진단기를 개별 사용자가 사용할 수 있게 해준다. 또한 bluetooth의 Serial Port Profile을 기반으로 휴대전화기와 converting 보드간의 선을 제거함으로써 사용자가 간단하게 진단 어플리케이션이 탑재된 bluetooth handset에서 진단을 할 수 있다. 실험을 통하여 제안한 방식의 실제 환경에서 잘 동작함을 검증하였다.

• The Korean Journal of Food And Nutrition
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• v.26 no.4
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• pp.952-966
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• 2013

The purpose of this study is to analyze the differences of food habits and food preferences between lower and higher grade students through the survey of elementary school students in Daejeon four elementary schools located in Jung-Gu and Seo-Gu in Daejeon are selected for this survey randomly and the completion of the questionnaires are according to grade. 1. Practical Analysis of Food Habits: For regular meals, the highest number of subjects skipped breakfast. It is being found that the girl students (81.61%) consumed more cooked rice than the boys (78.85%) and more boys (13.10%) ate bread or milk more than the girls (9.20%). The most important thing for the lower grades students (34.20%) when consuming is the nutritious foods, while the higher grades students (49.67%) consumed the set meals. During consumption, the highest number of the subjects watched TV or read books from time to time. More higher grades students (38.98%) preferred spicy and salty foods than the lower grades (22.09%). 2. Food Preferences: Between rice and noodles, most subjects preferred cooked rice (81.38%), Jajangmyeon (80.80%), Ramyeon (79.43%), and disliked bean-mixed rice (28.39%). For soups, Most students enjoy the Deokkguk. Majority of the subjects prefer meat and fried or steamed foods, and also grilled and pan-fried dishes. For the pan-roasted and fried dishes, most subjects did not enjoy the rhizome fry and sweet-pumpkin fry methods, and for vegetables, they did not like wild vegetable and seasoned cucumber (40.57%) The higher grades students enjoy the vegetables and salads more than the lower grades students. For Kimchi varieties, it is found that subjects like the cabbage Kimchi (69.66%) the most. There is little difference in food preference between the lower and higher grade students, but the rankings of food preferences are different according to various grades.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.24 no.1
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• pp.28-35
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• 2013

Objectives : The aim of this study was to examine attitudes of middle-school students toward happiness, suicide, and factors associated with suicide. Methods : A self-administered questionnaire was used in a cluster sample of 1,319 middle-school students (male 793, female 526). Data were obtained on a wide range of constructs regarding their attitude towards happiness, suicidal ideation and attempts, and factors associated with suicide. Results : Middle-school students choose 'love within family' as most important factor for their happiness. Subjective mental health status was mostly associated with happiness. Subjects in lower socioeconomic status tended to respond their mental health status was not good and have more suicidal idea. 48.7% of subjects had permissive attitudes toward suicide, especially, girls. However, 65.0% responded that suicide was preventable problem. Compared to older people, middle-school students perceived that environmental factors were more important than innate and personal factors for suicide. Conclusion : Results of the study indicate that middle-school students have permissive attitudes toward suicide, but positive attitudes for the prevention of suicide. This suggest that education in these age group could be effective for the prevention of suicide. Also, approaches to suicide prevention programs should be developed based on the family intervention. Especially, we should care about girls and adolescents in lower socioeconomic status.