• 한국과학교육학회지
• /
• 제41권2호
• /
• pp.133-144
• /
• 2021

이 연구에서는 초등 과학영재 학생의 과학긍정경험 향상을 위한 교수-학습 경험을 탐색하였다. 이를 위해 서울특별시의 한 초등 과학영재교육원에서 과학영재교육을 받는 초등학교 5-6학년 학생 36명을 선정하였다. 선정한 학생을 대상으로 과학긍정경험 지표에 관한 사전 검사와 사후 검사를 시행하였다. 또한 토요일에 진행되는 과학영재수업이 끝난 후에 일부 학생을 대상으로 과학긍정경험 향상을 위한 교수-학습 경험을 탐색하기 위해 개별적인 심층 면담을 시행하였다. 연구 결과, 해당 초등 과학영재교육원의 과학영재수업은 초등 과학영재 학생의 과학긍정경험을 향상시키는 것으로 나타났다. 과학긍정경험 향상을 위한 교수-학습 경험으로는 선행연구의 일반 학생에게서 나타난 '체험 중심의 탐구 활동', '학생 주도적 수업', '긍정적이고 전문적인 피드백', '탐구를 통한 지식 구성', '학생의 흥미와 적성을 반영한 수업', '실생활과 관련된 소재 활용', '모둠활동에서의 원활한 협업과 소통', '학습 내용의 적절한 난이도'의 8가지 교수-학습 경험과 과학영재 학생에게서 새롭게 나타난 '과학적 창의성 향상 전략을 통한 학습 경험', '꼬마 과학자로서의 탐구 경험', '심화 또는 속진 학습 경험', '우수한 학생과의 학습 경험', '다른 학생을 도와준 경험', '높거나 낮은 성취 경험'의 6가지 교수-학습 경험을 추출할 수 있었다. 이를 바탕으로 과학영재 학생의 과학긍정경험 향상 방안에 대한 실제적인 시사점에 대해 논하였다.

• 지역사회간호학회지
• /
• 제29권1호
• /
• pp.1-10
• /
• 2018

Purpose: The purpose of this study was to examine the prevalence and risk factors of suicidal ideation among middle class Korean. Methods: Cross sectional study was designed for secondary data analysis. From the 8th Korea Health Panel survey (2008~2013), a total of 6,037 data was drawn and analyzed by developmental stage using descriptive statistics including frequency, percentage, $x^2$ test, and logistic regression analysis. Results: Across all age groups, high physical-mental stress, frustration, anxiety about the future and low self-perceived health status or social class were found to be the risk factors of suicidal ideation. Peer-compared subjective health status and frustration significantly influenced the adolescents. The young adults'suicidal ideation was mainly influenced by physical and mental stress, frustration and absence of economic activity. For the middle-aged, physical and mental stress, frustration, future anxiety, low peer-compared subjective health status were found to be the major influencing factors. The predominant risk factors for the elderly were frustration and low peer-compared subjective health status. Conclusion: Making comparisons to others significantly influence suicidal ideation throughout all life cycles. Improvement of mental health and suicide prevention can be enhanced by avoiding negative comparison to others.

• 한국환경과학회지
• /
• 제19권7호
• /
• pp.879-888
• /
• 2010

The consciousness of environmental education has increased for the last decades, and schools make efforts for education in the systematic environment. To keep pace with trends such as the open school and the open class, students, teachers and parents are actively participating in environmental education programs. Parents' active participate in environmental education programs will provide excellent basis to operate environmental education efficiently and advise fruitful operation of environmental education programs. In addition, as parents play an important role of deciding the students' life habits or attitudes about environment, their participation is greatly meaningful. This study was conducted to 203 fourth and fifth graders in M elementary school in Ulsan city that operated the model school for protecting the forest from March to December, 2009 and their parents in order to examine the effects of parents' participation in environmental education programs, and the results are as follows. First, the student group with parents who participated in environmental education programs showed higher interest in surrounding environment of the school. Second, the student group with parents who participated in environmental education programs showed higher environment sensitiveness and environmental practice intention. Third, the parent group who participated in environmental education programs showed higher environmental sensitiveness and environmental practice intention. Fourth, the parent group who participated in environmental education programs showed higher satisfaction about the program. As the result of the study, environmental education programs with parents' participation attracted their active interest and participation about school environment problems, and a lot of conversation and attention between students and parents who participated in environmental education programs improved the students and their parents' environmental sensitiveness and environmental practice intention.

• 대한간호학회지
• /
• 제26권4호
• /
• pp.808-819
• /
• 1996

The purpose of this study was to examine the stressors and coping strategies of school -age children and to explore the relationship between stressful life events and health symptoms and the effects of coping and trait anxiety which is theoretically considered to mediate the relationship between stress and health symptom. The study subjects consisted of 639 elementary school children in the fourth to sixth grade living in Seoul. Of the 639 subjects, 348 were boys and 291 were girls. The mean age was 11.35 (SD=.86). The Feel Bad Scale(FBS), Schoolager's Coping Strategy Inventory(SCSI), Spielberger's Trait Anxiety Scale for Children(STAIC), and Health Symptom Questionnaire (HSQ) were adapted for this study. A pilot study was undertaken to ascertain the reliability and validity of the instruments. The Cronbach alphas of FBS, SCSI, STAIC and HSQ were from .81 to .92. The Researcher and a research assistant visited the school and data were collected in the class using the questionnaire method after an explanation of the purpose and procedures was given to the children. Data collection was done during the period between Nov.25 to Dec.19, 1995. Using the SAS statistical program, percentages, t-test, ANOVA, correlation analysis, and multiple regression were used for data analysis. The result are as follows : 1. The mean score for the FBS was 204.79(range : 48-472) and there was a significant difference according to grade. The most severe stressors perceived by children were parental divorce and death or illness of family members. The most frequently experienced stressful life events were conflict with siblings and being home alone. 2. The mean score for the SCSI was 57.36(range : 9-118) and there was a significant difference according to grade. The most frequently used, and perceived as helpful, coping strategies were distraction and cognitive activities. 3. The mean score for the HSQ were 20.7(range : 0-81) and there were significant differences according to grade and sex. The percentage of the children answering that they perceived their health state as not good was 3.9%. 4. The mean score for the STAIC was 33.76 and there were significant differences according to grade and sex. 5. There was a significant relationship between stressful life events and health symptoms ( r=.53, p<.01). Also, Stressful life events were postively related with coping strategies(r=.39, p<.01). Trait anxiety was highly correlated with health symptoms(r=.72, p<.01). 6. To examine the multivariate effects of the variables to health symptoms, multiple regression was performed. Stressful life events, coping, trait anxiety, and health concerns were identified as significant variables. Explanation of the health symptoms by these variables was 56.78%. The study revealed that stressful life events correlated with health symptoms in school-age children and coping and trait anxiety had mediating effects on this relationship. The implication for nursing is that there is a need to develop supportive interventions for high risk population to decrease health problems due to stress. Also, it is recommended that a study be conducted to explore protective factors for the prevention of health problems in children.

• 한국가정과교육학회지
• /
• 제24권1호
• /
• pp.21-36
• /
• 2012

본 연구는 학교교육에서 여고생을 대상으로 한 식생활교육의 방향을 알아보기 위해 대구 경북지역 1, 2학년 여자고등학생 409명을 대상으로 영양지식, 식습관, 식생활교육 수업에 대한 만족도, 가정교과의 식생활교육이 실생활에서 도움을 주는 정도에 대하여 자기기입식 설문조사로 실시되었다. 영양지식 점수는 9.2/15.0점으로 계열, 학년, 형제 수, 성적과 유의적 상관관계를 나타내었다(p<0.05). 아침식사(85.8%), 적절한 식사속도(82.9%) 항목의 점수는 높았으나 병원성 미생물(43.0%), 열량영양소(40.3%), 당뇨병 식이관리(21.3%) 항목은 매우 낮은 정답률을 보였고, 쌀의 조리원리와 병원성 미생물에 대한 항목은 잘 모르겠다고 응답한 학생이 각각 51.8%, 49.1%로 가장 높았다. 식습관 점수는 3.3/5.0점으로 계열, 부의 직업, 경제적 수준과 유의적인 차이를 보였다(p<0.05). 식품구매 시 영양표시 및 유통기한, 원산지 확인 항목의 점수가 가장 높았으나(3.86/5.00점) 싱겁게 먹기 항목은 2.93/5.00점으로 가장 낮았다. 식생활교육 수업에 대해서는 42.1%가 만족하고 있었으나 8.3%가 불만족한 것으로 조사되었고, 불만족한 가장 큰 이유는 수업시간이 적다가 8.3%로 가장 높았다. 실험 및 실습수업을 가장 선호하였으며, 식생활교육 만족도 점수는3.39/5.00점, 식생활교육이 실생활에 도움을 주는 정도도 3.39/5.00점으로 대체로 낮았고, 음식 만들기(3.81점), 위생적이고 안전한 식생활(3.71점), 건강한 생활(3.68점) 항목점수가 높았다. 식생활교육 수업에 대한 만족도가 높을수록 실생활에 도움이 되는 정도, 영양지식, 식습관의 점수가 유의적으로 높았으며(p<0.01), 영양지식과 식습관 점수가 높을수록 실생활에서 도움이 많이 된다고 생각하였고(p<0.001), 영양지식 점수가 높을수록 식습관 점수가 높은 것으로(p<0.001)로 조사되었다. 따라서 여고생을 대상으로 한 가정교과의 식생활교육은 학부모와 연계하여 실생활에서의 활용도를 높이고, 학생의 진로와 요구를 반영한 효과적인 수업전략 및 식생활교육 시간 확보 등으로 식생활교육 만족도를 높이기 위한 교사의 적극적인 활동이 요구되었다.

• 공업화학
• /
• 제25권1호
• /
• pp.1-13
• /
• 2014

리튬이온 배터리는 전기화학 에너지 저장 및 변환 기기에서 가장 높은 수준의 기술력을 기반으로 개발된 셀이며, 여전히 높은 에너지 밀도와 충방전 안정성이 높아서 가장 매력적인 배터리의 부류로서 평가받고 있다. 최근 급속한 대형 에너지 저장 응용시스템의 개발이 이루어지면서 기존의 그래파이트 전극을 대체하기 위한 새로운 음극물질의 개발이 요구되고 있다. 게르마늄과 실리콘은 이론적 에너지 용량이 높아서 다음 세대 리튬 배터리의 적합한 물질로 평가받고 있으며, 특히 게르마늄은 실리콘에 비해 충방전에 따른 부피변화가 상대적으로 적고, 리튬이온의 동력학 거동이 용이하며, 높은 전기전도도 특성이 있다. 본 총설에서는 우선 리튬이온 배터리의 기본 원리를 소개하고, 배터리 특성을 최대한 발휘할 수 있는 이상적인 음극 물질의 구조와 특성을 살펴보고자 한다. 다음 세대 음극물질로 고려되고 있는 게르마늄 복합체가 어떻게 현재의 리튬 배터리를 개선할 수 있을지를 논의하려고 한다. 그리고 최근 시도되고 있는 연구동향에 대한 소개를 끝으로 리튬이온 배터리의 고에너지 밀도화에 대한 참고문헌이 될 수 있기를 바란다.

• 대한방사선기술학회지:방사선기술과학
• /
• 제46권5호
• /
• pp.435-444
• /
• 2023

The purpose of this study was to analyze the factors that demographic factors, radiation knowledge level, and radiation awareness could be affecting the benefits of radiation. From July 2022 to July 2023, after receiving consent to participate by using the link of Naver through Social Network Service (SNS) for the general public, 312 people were surveyed by self-registration method without collecting personal information. The questionnaire consisted of a total of 25 questions following demographic factors (5 questions including age group by life cycle, sex, monthly household income, residence), radiation knowledge level (8 questions including basic physical, biological effects, radiation protection technology), radiation awareness (12 questions including risk, management, benefit). Independent sample T-test and ANOVA tests were performed for significant differences in the average radiation awareness between variables, and hierarchical regression was performed to identify influencing factors on radiation benefits. As a result, the benefit of radiation was significantly high among the radiation awareness, but the awareness of the danger of radiation was insufficient to the level of recognizing it as safe. Men had significantly higher awareness of radiation management and benefits than women, and the awareness of radiation management was significantly higher in the middle class with a monthly household income of 4.31 million won or more. The higher the knowledge level of radiation, the higher the awareness of the benefits of radiation. The factors that had a positive effect on radiation benefits were the high level of radiation knowledge and awareness of radiation management.

• Journal of Species Research
• /
• 제8권4호
• /
• pp.319-336
• /
• 2019

During an investigation of unrecorded prokaryotic species in Republic of Korea, a total of 53 bacterial strains belonging to the class Gammaproteobacteria were isolated from soil, seawater, tidal flats, rhizosphere, salt ponds, beach sand, urine, manure, sediment, and animal intestine (Russian grayling butterfly [Hipparchia autonoe], mouse [Mus musculus], and sea bass [Lateolabrax japonicus]). Strains were identified to species using the 16S rRNA gene sequence, showing high similarity (>98.7%) with the closest bacterial species and forming a robust clade in the neighbor-joining phylogenetic tree. The 53 strains of Gammaproteobacteria in this study have not been report previously in Korea. Therefore, we describe 27 genera of 16 families in 7 orders: 13 strains in the order Alteromonadales, 1 strain in the order Chromatiales, 11 strains in the order Enterobacterales, 7 strains in the order Oceanospirillales, 10 strains in the order Pseudomonadales, 8 strains in the order Vibrionales, and 3 strains in the order Xanthomonadales. Gram reaction, strain ID, isolation source, and morphological and basic biochemical characteristics are described for each species.

• 한국초등과학교육학회지:초등과학교육
• /
• 제23권1호
• /
• pp.44-49
• /
• 2004

This study was based upon the survey on the name of 13 basic experimental instruments used in elementary science class: Schale, evaporating dish, mortar & pestle, beaker, erlenmeyer flask, spuit(medicine dropper), graduated cylinder, balance, spatula, dropping bottle, gas collecting bottle, funnel, alcohol burner, and their uses. To implement this study, an open-ended, written questionnaire was administered to the subjects of in-service elementary school teachers, future elementary teachers who have attended at the Gyeongin national university of education, and elementary students in Korea. The findings of this study were as follows: The rates of in-service and pre-service elementary school teachers that knew correct name of experimental instruments were not high, the elementary school student's rates were especially very low. In this study, we found several reasons which they wrote inaccurately: the name to be represented at the textbook that they had studied, the confusion of the name about a fortis pronunciation, the recognition as the vocabulary like flask and cylinder to be meaningless, the habit to say in an everyday life, wrong expression in the internet and general book. All respondents had a wide range of perceptions of uses for the experimental instruments. Their understanding of uses for evaporating dish, erlenmeyer flask, balance, gas collecting bottle were very poor. And then most of them understood that graduated cylinder, beaker, and erlenmeyer flask were tools to measure the volume of solution or liquid, so they did not exactly distinguish the difference of their uses.

• 한국수학교육학회지시리즈A:수학교육
• /
• 제41권1호
• /
• pp.19-34
• /
• 2002

The 7th national mathematics curriculum lays emphasis on an interrelation of several subjects and a connection between mathematics and real life. In this reason, this study focuses on the enhancement of sound understanding nuclear energy which is one of important factor(concepts or contents) dealt with in the other subjects such as science, environment, social studies, etc.. Recently, even though it is insistent that nuclear energy be so important and request in the future society, there are still strong pro and cons regarding the use of it. In this study, teaching-and-learning materials were developed dealing with using nuclear energy, and consequently they might be used in math class for the purpose of enhancement of mathematical learning ability and of recognition on nuclear energy. In this study, Material 1 included a matter of the necessity for nuclear power plants using the ratio concept, and Material 2 did on a matter of the efficiency of nuclear energy and the unclear of nuclear power plants using ratio-graph, in the elementary and upper school mathematics. Material 3 focused on a matter of the principles of nuclear power plants using the properties of exponential law in high school mathematics. Ultimately, it is hoped in the study that more diverse instructional materials dealing with diverse situations inside and outside mathematics would be developed.