• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.7
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• pp.1075-1081
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• 2013

Twitter, Facebook, and KakaoStory are the major SNS in Korea. Social knowledge production is being produced by those services from numerous collaboration and co-participation in those SNS. Wikipedia or Naver JishikIN service was regarded as the representative product of collective knowledge production during the wired internet era. However now at the wireless internet era centered with smart phones, various forms of collective knowledge production would be achieved by connecting to SNS in real-time. In this thesis, the survey data of collective knowledge production for users of three SNS have been compared and analyzed. The difference of the collective knowledge production mechanism among Twitter, Facebook and KakaoStory has been studied and compared through three variables: the motivation of collective knowledge production, the preference of collective knowledge production model, and collective knowledge production cultural perception. As a result of the analysis of the discriminant factors for three SNS user groups, it turns out that the diversity-toward usage motivation, personal contribution motivation, and collective knowledge production tendency perception are the most influential variables. This thesis is of significance in that it unites the value of social science such as social capital and collective knowledge production from the viewpoint of computer science and opens the new chapter of collective knowledge production with the real-time SNS of wireless internet from the wired internet.

• Journal of the Korea Convergence Society
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• v.11 no.9
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• pp.297-303
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• 2020

The purpose of this study is to investigate the effects of aerobic exercise and probiotics ingestion on motor learning and body weight in female mice during adolescence. The subjects were divided into six groups of variables, such as non-exercise, moderate, high-intensity exercise, probiotics ingestion, and non-probiotics, and then treated for four weeks. The vertical grid test was conducted before and after the treatment to evaluate motor learning and bodyweight. The high-intensity exercise and probiotics ingestion group showed fastest up, rotation, and down rate than the non-exercise group (p<.001). Also, a group that treated exercise and probiotics tended to record speedier performance than those that performed the only exercise. Comparing weight changes, the weight gain of a group that performed only moderate-intensity exercise was higher than that of a non-probiotics and non-exercise group (p=.032). Taken together, aerobic exercise during adolescence can help improve motor learning, and more efficient motor learning can be achieved when combined with probiotics ingestion.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.2
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• pp.653-664
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• 2011

In this study, I collected materials through the survey whose object is 573 students of technical high schools and 512 students of academic high schools in Seoul and Kyunggi areas, for examining dangerous factors and protective factors which influence on school resilience in technical high schools. The studying results are as followed. First, as the result of analyzing correlation between school resilience and dangerous factor, the higher dangerous factor was, the lower school resilience was. Second, as the result verifying the effects of dangerous factor on school resilience, discrimination of teacher, delinquency bond and anti-sociality made an effect on students in technical high schools and discrimination of teacher, delinquency bond and depression made an effect on students in academic high schools. Third, as the result analyzing correlation between school resilience and protective factor, the higher protective factor was, the higher school resilience was. Forth, as the result verifying the effects of protective factor on school resilience, support of teacher, democratic atmosphere of school, sense of responsibility, family cohesion, self-worth, rational supporting attitude made an effort on students in technical high schools and support of teacher, democratic atmosphere of school, sense of responsibility and family cohesion made an effect on students in academic high schools. Fifth, as the result analyzing the difference between dangerous factor and protective factor according to grade of school and standard of school resilience, there was an interaction in variables of anti-sociality, depression, delinquency bond and self-worth.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.18 no.6
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• pp.22-30
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• 2004

It is an attempt to suggest the standard valuation method of the environmental illumination for the bridges across the Han-river from an aesthetic point of view, deviating from the technical and traditional viewpoint. In Korea the current evaluation criterion to verify the value of bridge design has a partiality for the technical and structural safety rather than the sentient beauty on the whole. However, the recently cultural reform of Korean mass society with the elevation of the standard of living forces the engineering designers for bridges to focus not only on competing physical structures but also on enhancing the formative beauty including the illumination effects for night view. Additionally, the new policy, which transforms the environments around the Han-river into the major tourist attractions has been executing strongly by the city authorities to revitalize the symbolic, historic, and cultural identity of the capital city with the introduction of the high-quality environmental illumination for the bridges. As a result, It becomes necessary to establish the manual and standardization of the environmental illumination planning for the city in terms of the formative beauty, and this study is to suggest the valuation model method of the environmental illumination for the bridges as the initial step of the standardization. In the study, the valuation items of the standard questionnaire are selected by the documentary records and the consultation of various experts in architecture, design, fine art, urban planning and even administration to verify the essential elements of the aesthetic beauty with the local amenity and the environmental harmony for the chosen bridges across the Han-river.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.5
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• pp.506-515
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• 2016

The purpose of this study was to identify the factors associated with the levels of depression of the elderly (living in urban areas). Interviews were performed during the period from July 1, 2015 to August 31, 2015 of 386 elderly people in urban areas. The mean score of depressive symptoms was significantly higher in the subjects of higher age, lower educational level, living alone, having a lower monthly income, relying on government subsidy for their living expenses, having a chronic illness, lower state of subjective health, without regular exercise, poorer subjective sleeping time, lower frequency of going out, irregular eating habits, depending on some level of help for their ADL and IADL, and having lower self-esteem and social support. The depressive symptoms showed a meaningful positive correlation with ADL and IADL and a negative correlation with self-esteem and social support. On multiple regression analysis, the meaningful variables related to their depressive symptoms were their education, monthly income, subjective health status, ADL, self-esteem, and social support. Also, according to the variables was 54.1% of depressive symptoms. Therefore, it is considered that the practice of physical and mental health care, as well as social support, is required to reduce the level of depression in the elderly.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.4
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• pp.1711-1720
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• 2011

This study was performed to determine the levels of suicide awareness and attitudes among the high school students in urban and rural areas, and to reveal its related factors. The interviews were performed, during the period from July 1, to July 31, 2009, to the 2,082 students in urban and rural areas. As a results, the suicide awareness rate of subjects was 38.8%, and they were not significant between urban and rural areas. The levels of suicide awareness and attitudes were significantly higher in rural students than that of urban students. The factors affecting suicide awareness in urban areas were living with parents, academic speciality, suicide ideation, suicide attitudes, and sex, argument with parents, suicide ideation and suicide attitudes were affected in rural areas. The factors affecting suicide attitudes in urban areas were academic speciality, suicide awareness, and sex, smoking and suicide awareness were affected in rural areas. In conclusion, the development of suicide prevention programs would required to keep under management of the factors affecting suicide awareness and attitudes such as the factors family and school lifes.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.1
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• pp.184-193
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• 2013

This study examined a correspondence of children's anticipated vocations, perceived competencies, and interests. For the purpose, this study asked 659 primary school students what activities they liked, those they thought they were good at, and what job they expected when they grew up. The responses were coded into RIASEC Holland codes and agreement across the three questions was examined using kappa statistics. Results indicated that there was a correspondence of children's anticipated vocations, perceived competencies, and interests. When broken down into separate examinations by gender, males and females had significant kappas for agreement between vocation and competence. And the correspondence of competence and interest was significant for males too. We couldn't examine females' case because they didn't answer C-type of Holland. Examinations of the results by grade demonstrated that 5th-grade and 6th-grade had significant kappas for agreement between vocation and competence. However the correspondence of vocation and interest was significant for 5th-grade. the correspondence of competence and interest was significant for 5th-grade too. We couldn't examine 6th-grade's case because they didn't answer C-type of Holland. The result obtained from this study indicate that there is a correspondence of children's anticipated vocations, perceived competencies, and interests. Such a result means that children, 5th-grade and 6th-grade, can consider their competencies and interests with their vocations. The findings are especially relevant for counselors and teachers working with children.

• International Journal of Highway Engineering
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• v.4 no.4 s.14
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• pp.41-52
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• 2002

This study dealt with analysis of size effect of testing apparatus for Kim test which measures rut resistance characteristics of asphalt mixture under static loading. Two columns in different diameter with each column having different radios of round cut (Curvature) at the bottom were used for testing asphalt mixture. Deformation load ($P_{max}$) and deformation strength ($K_D$) were found to have relatively high correlation with rut depth and dynamic stability of asphalt concrete. Diameter of specimen was not a significant factor in this test. From the statistical correlation analysis with rutting properties, the radius of curvature and diameter of loading column were found to be important factor affecting the results of the test. Among the radios (r) of curvatures, r=0.5cm and 1.0cm showed much higher correlation than the column without curvature, and r=1.0cm being better between the two. The column with diameter of 4cm showed better correlation than diameter of 3cm. Therefore, the column of 4cm diameter with r=1.0cm was found to be the best among various apparatus sizes. Prediction models for rut depth and dynamic stability were developed for each aggregate mixture based on Kim test variables using SAS STEPWISE procedure. Therefore, if this test method is validated through further study, Kim test can be used for selecting asphalt mixture with the highest resistance against permanent deformation.

• Journal of the Korean Vacuum Society
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• v.9 no.3
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• pp.197-206
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• 2000

The deposition characteristics of MOCVD Cu using the (hfac)Cu(1,1-COD)(1,1,1,5,5,5-hexafluoro-2,4-pentadionato Cu(I) 1,5-cyclooctadine) have been investigated in terms of the effects of carrier gas such as hydrogen and argon as well as the effects of H(hfac) ligand addition. MOCVD Cu using a hydrogen carrier gas led to a higher deposition rate and lower resistivity than an argon carrier gas system. The improvement in the surface roughness of the MOCVD Cu films and the (111) preferred orientation texture was obtained by using a hydrogen carrier gas. However, the adhesion characteristics of the films showed relatively weaker compared to the Ar carrier gas system, probably due to the larger amount of F content in the films, which was confirmed by the AES analyses. When an additional H(hfac) ligand was added, the deposition rate was significantly enhanced in the case of an argon + H(hfac) carrier gas system while significant change in the deposition rate of MOCVD Cu was not observed in the case of the hydrogen carrier gas system. However, the addition of H(hfac) in both carrier gases led to lowering the resistivity of the MOCVD Cu films. In conclusion, this paper suggests the deposition mechanism of MOCVD Cu and is expected to contribute to the enhancement of smooth Cu films with a low resistivity by manipulating the deposition conditions such as the carrier gas and addition of H(hfac) ligand.

• Proceedings of the KSCN Conference
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• 2003.11a
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• pp.1081-1082
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• 2003

교육인적자원부에서는 학교급식의 안전성 확보를 위하여 1999년에 특별정책 연구를 실시하여 학교급식 HACCP 일반모델을 개발 보급하고 2001년부터는 규모가 큰 학교에서 조리실이 설치된 모든 급식학교로 점진적으로 적용을 확대하였다. 그럼에도 불구하고 학교급식에서 식중독 사고는 증가 추세에 있으므로 학교급식에서의 HACCP 시스템을 재진단하고 수행도가 낮은 중점관리점의 문제점을 짚어내는 것이 필요하다. 따라서 본 연구에서는 대전지역의 초, 중, 고등학교 영양사 153명을 대상으로 위생관리 직무 수행도와 HACCP의 일부 CCP (중점관리점)수행도, HACCP에 대한 인지도, 급식시설현황 등에 대하여 조사하고 변인간의 관련성을 분석하였다. 조사 대상자는 초등학교 영양사 56.5%, 중학교 영양사 25.5%, 고등학교 영양사 17.6%이었으며 4년제 대학 졸업자가 51.0%로 가장 많았고 연령은 30-34세가 36.6%, 35-40세가 21.6%로 30대가 대부분이었다. 근무경력은 평균 5.8년이었으며 영양사 1인당 담당하는 평균 학생수는 1,163명, 조리종사원 1인당 배식 아동수는 평균 124명이었다. 배식방법은 교실배식이 56.2%, 식당배식 34.6%, 교실과 식당의 혼합형태가 9.2%로 교실배식이 차지하는 비율이 많았고 직영급식이 90.2%로 대부분을 차지하였다. 위생관리 영역의 수행도는 개인위생관리 부문이 가장 높았고 기기설비 위생관리, 저장관리, 교차오염관리, 시간관리, 온도관리 순으로 나타났으며, 특히 온도관리 수행도는 낮은 것으로 나타났다. 식당배식을 실시하는 학교의 온도관리 수행도가 다른 그룹에 비해 높았고 직영급식의 시간관리수행도가 위탁급식 보다 높았다. 영양사의 연령과 근무경력이 증가할수록 모든 위생관리영역에서 수행도가 높아지는 경향을 보였다. CCP별 수행정도 평가에서는 ‘운반 및 배식과정(CCP7)’이 가장 높은 수행도를 나타냈고 그 다음으로는 ‘검수’, ‘식품취급 및 조리과정’, ‘식품접촉 표면 세척 및 소독과정’, ‘식단의 구성’, ‘생채소 및 과일의 소독’, ‘잠재적으로 위험한 식단의 관리’ 순으로 나타났다. ‘운반 및 배식과정의 수행도’는 식당배식이 유의적으로 높은 점수를 보였고 CCP8(식품접촉표면의 세척 및 소독)를 제외한 모든 영역에서 직영급식이 위탁급식에 비해 높은 유의성을 나타내었다. 또한 근무경력과 연령이 많을수록 모든 CCP영역에서 높은 수행도를 보였다. CCP1과 CCP2의 수행도가 낮은 주된 이유로 ‘CCP1과 CCP2의 관리기준이 이해하기 어렵다’이었다. 학교 급식관리 영양사의 HACCP시스템에 대한 지식 및 이해 정도를 조사한 결과 HACCP 인지도 점수의 평균은 총 100점 만점에 전체 평균 점수는 74.9점이었다 CCP별 점수분포는 CCP7의 인지도 점수가 가장 높았고 CCP6, CCP1, CCP5, CCP3, CCP8, CCP2의 순으로 절차 낮아졌다. 정규직의 HACCP인지도 점수가 위탁직 보다 높았으며 근무경력에서도 경력이 3년 미만인 경우가 가장 낮고 8년 이상인 경우가 가장 높은 점수를 보였다. 급식시설면은 보온보냉시설을 갖춘 학교가 온도관리 부문에서 갖추지 않은 학교보다 높은 수행도를 나타냈고, 전처리실과 손 소독기가 있는 학교는 교차오염관리 부문에서 높은 수행도를 보였다.