• 한국치위생학회지
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• 제12권1호
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• pp.47-55
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• 2012

Objectives : The purpose of this study is to examine relations among the subjective oral symptoms, general characteristics and subject oral health perception of aged people residing in some regions of a large city, ultimately providing basic information needed to develop and implement programs oral health project and oral health education programs for the oral health promotion of those people. Methods : For the above purpose, this researcher conducted a questionnaire survey of people aged 65 or over from July 10th to 28th, 2011. Among the copies of the questionnaire distributed to the subjects, 318 were recollected. Out the recollected forms, 18 which were deemed as inappropriately filled in were excluded, and the remaining 300 were finally analyzed. Results : The results are as follows. Subjective oral symptoms have correlation(p<0.001) with aged people's subject oral health perception. Factors of influencing subject oral health perception were indicated to be age(p=0.021) and trouble chewing(p<0.001). Conclusions : A sustainable oral health management system that aims to improve the oral health of aged people should be developed and implemented. This study may have some limitations to be generalized because it was conducted by focusing on aged people of some regions only.

• Journal of Information Science Theory and Practice
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• 제11권4호
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• pp.40-50
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• 2023

Research in interdisciplinary fields like biomechanics is published in a variety of journals whose visibility depends on bibliometric indexing that is often driven by citation analysis of bibliometric databases. This study documented variation in publication metrics and research subject categories assigned to 14 biomechanics journals. Authors, citation, and citation rate (CR) were collected for the top 15 cited articles in the journals retrieved from the Google Scholar service. Research subject categories were also extracted for journals from three databases (Dimensions, Journal Citation Reports, and Scopus). Despite the focus on biomechanics for the journals studied, these biomechanics journals have widely varying CR and subject categories assigned to them. There were significant (p=0.001) and meaningful (77-108%) differences in median CR between average, low, and high CR groups of these biomechanics journals. Since CR are primary data used to calculate most journal metrics and there is no one biomechanics subject category, field normalization for journal citation metrics in biomechanics is difficult. Care must be taken to accurately interpret most citation metrics of biomechanics journals as biased proxies of general usage of research, given a specific database, time frame, and area of biomechanics research.

• 한국환경생태학회지
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• 제27권2호
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• pp.219-229
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• 2013

본 연구는 산림을 기반으로 서식하는 야생조류의 효율적인 조사시간을 계절별로 제시하기 위하여 남해군 삼동면 물건리 방조어부림을 대상으로 수행하였다. 적합성을 규명하기 위해 대상지 및 일대의 토지이용현황, 현존식생, 식생구조 등을 파악하였으며, 산림성 야생조류의 적정 조사시간을 제안하고자 계절별 3일간 일출 몰 시간을 기준하여 1시간 간격으로 반복 조사하였다. 방조어부림은 주변 산림과 연결되어 산림성 야생조류의 유입이 가능하고 숲 자체의 층위구조 발달, 대경목의 느티나무와 푸조나무가 분포하는 등 자연림과 유사하여 다양한 서식처 및 채이장소를 제공할 수 있어 야생조류를 연구하기에 적합한 장소이다. 관찰된 105종을 유형화하여 산새류를 구분하였고 각 계절별로 시간대별 최고값을 선정한 후 총 출현 종수 및 개체수에 대해 시간대별 종풍부도, 종다양도, 유사도지수를 분석하였다. 그 결과 봄철에는 8~9시까지가 최적의 조사시간이었고 여름철에는 전체 출현종과의 종구성이 유사한 6~9시의 시간대가 적정 조사시간이었다. 가을철에는 일출 후 30~60분 이후부터인 오전 7시부터 11시까지의 시간대에 야생조류의 움직임이 활발하여 관찰이 용이한 것으로 분석되었으며 그 중 8~9시에 종풍부도가 가장 높아 최적의 조사시간이었다. 겨울철은 7~12시의 시간대가 효율적이며 10~11시가 최적 시간이나 일몰 전 1시간을 제외하면 시간대별 편차가 크지 않아 유사한 결과를 도출할 수 있을 것이다. 4계절 모두 일출 후 30~60분 후부터 조사를 실시하는 것이 대상지역의 야생조류 군집을 파악하기에 바람직한 것으로 판단되었다.

• 공학교육연구
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• 제20권2호
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• pp.31-38
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• 2017

In this study, specific teaching methods of lecturing and improved discussion methods (combining discussion and problem-based learning) were selected and applied for each major subject and learning content area in the fields of engineering, language, and social sciences. Then, the selected teaching methods were examined to determine the most effective learning contents. Finally, in order to determine the most effective teaching methods, a survey on student satisfaction was analyzed statistically. The results showed that students preferred teaching methods that combine lectures and improved discussion methods to the traditional method of only lectures. Therefore, this research proposes the combined teaching method for each major subject and learning content area.

• 한국자동차공학회논문집
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• 제7권6호
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• pp.32-41
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• 1999

Natural gas is an attractive fuel in view of environment benefits due to its flow carbon-to-hydrogen ratio. However, its compositions and properties are varied depending upon production regional groups. Therefore, study on the combustion characteristics of natural gas engines with a variety of compositions has been demanded for the efficient application of gas engines. This study aims to investigate the effects of gas composition on engine combustion characteristics. It was found that , by controlling an engine with fixed fuel nozzle area, power and heat release were subject to Wobbe Index. And at fixed excess air ratios, power and heat release were subject to low heating value of unit mixture . In addition, in case of constant nozzle area, combustion duration was found to be inversely proportional to CP(Combustion Potential), and the condition of fixed excess air ratios showed no change in combustion duration, regardless of CP.

• 한국도서관정보학회지
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• 제38권3호
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• pp.161-181
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• 2007

이 연구는 도서관의 지도자료를 분류하는데 필요한 이상적인 분류표를 제안하기 위해서 세계적으로 이 분야의 권위있는 분류표인 LCC의 지도자료 분류의 변천과정 분석과 전개 및 그 특성을 면밀히 검토하였다. 이 검토를 바탕으로 하여 KDC에서의 지도자료의 분류를 위한 분류표의 적용방안을 지역구분표의 통합과 세분화 그리고 주제구분표의 적용을 중심으로 제시하는 것이 이 연구의 주된 목적이다.

• 복식문화연구
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• 제2권2호
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• pp.385-394
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• 1994

Data of the body surface is a necessary unit for the measuring of metabolism energy and activity energy. And also, these data are referring to check the degree of retaining warmth of clothes, to find the effect of heat insulation according to body surface, to calculate an average temperature of skin, and to study the several fields of clothing. In measuring of body surface, it si actually impossible to measure a subject's body surface in each experiment. As the experimental method, both gypsum method, by which the shape of body an be copied as it is, and the weighting method from which planed body surface area can be measured with consistent thickness of polyprophylene film as used. In fact, every female subject feels uncomfortable to measure her body surface as a naked body. There, it is providing a simple, accurate regressive equation with weight & height as variable factors in this study. This equation is as=117.02W+77.31H-3344.94 with average error : 0.1%, absolute average error : 2.07%.

• Geomechanics and Engineering
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• 제30권4호
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• pp.353-362
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• 2022

The seismic failure-prone region in Istanbul has been examined in terms of the segmented pipelines. Although some researchers have suggested that this territory should be left as a green land, many people continue to live in this area. This region is about 9-10 km away from the North Anatolian Fault Line. This fault zone is an active right-lateral strike-slip fault line in Turkey and an earthquake with a magnitude of 7.0-7.5 is expected in the Marmara Sea. Therefore, superstructures and infrastructures are under both land sliding risks and seismic risks in this area. Because there are not any pipeline-fault line intersection points in the region, in this study, it has been focused on the behaviors of the segmented (sewage or stormwater) pipelines subject to earthquake-induced permanent ground deformation and seismic wave propagation. Based on the elastic beam theory some necessary analyses have been carried out and obtained results of this approximation have been examined.

• 한국초등과학교육학회지:초등과학교육
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• 제26권1호
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• pp.63-75
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• 2007

This study investigated how the contents of biology domains that were dealt with in the 7th national elementary-school science curriculum were in turn dealt with in the other subject matter areas. Through this, it was hoped that the place and identity of biology as a subject could be more clearly established and defined and additionally, more basic data for developing the new national science curriculum could be acquired at the same time. Subject matter areas that overlapped with biology in the 7th national elementary-school curriculum were practical arts, social studies and physical education. The structure and composition of specific components that were dealt with by these subject matter areas were very different from those of science, and the analysis showed that they failed to correspond across grades. Moreover, topics such as 'natural calamities and the environment' and 'human reproduction' that were dealt with by other subject matter areas, but not in science must be included for developing the new national science curriculum. Accordingly, when it comes to composing the contents of each subject matter area during creation of the new national curriculum, the relevant experts in related subject matter areas should be mobilized to conduct in-depth analysis of the following areas: viability, the most appropriate level of difficulty, and appropriateness of any hierarchy of relative importance between subjects. Additionally, efforts to reflect any improvements in the way the new national curriculum is developed which come about through this research are needed.

• 정보교육학회논문지
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• 제19권3호
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• pp.279-286
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• 2015

현재 영재교육은 정부방침에 따라 융합형태의 교육을 지향하고 있다. 본 연구의 목적은 정보영재아동에 있어서 정보과목과 과학과목(물리, 화학, 생물, 지학)의 상관관계를 분석하는 것이다. 이를 위해 서울시내 한 대학부설 과학영재교육원의 정보영재아동을 대상으로 재학기간의 성적을 바탕으로 분석하였다. 통계분석 결과 정보과목과 생물과목의 상관관계를 보여주었다. 즉 정보과목을 잘하면 생물과목도 잘하는 것으로 분석되었다. 나머지 물리, 화학 및 지구과학과목에 대해서는 상관관계가 없음을 나타내었다. 본 연구결과는 향후 정보영재교육에 있어서 과학과목의 비중, 교육내용의 구성 등에 중요한 기초자료로 사용될 것이다.