• 대한수학교육학회지:수학교육학연구
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• 제21권2호
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• pp.181-199
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• 2011

평면도형 넓이 공식은 넓이와 관련이 있는 길이 사이의 관계를 형식화하여 나타낸 것으로 평면도형의 넓이 공식 이해에는 넓이 공식에 내재된 관계 이해가 포함된다. 이 연구에서는 초등학교 5학년 아동들을 대상으로 직사각형, 평행사변형, 삼각형의 넓이 공식에 내재된 관계 이해에 관한 문제를 어떻게 해결하는지 조사하였다. 조사 결과 직사각형과 평행사변형의 넓이 공식에 내재된 관계 이해 문제에 비해 삼각형의 넓이 공식에 내재된 관계 이해 문제의 해결 정도가 상대적으로 낮은 것으로 나타났다. 아동들의 문제 해결 과정으로부터 세 가지 전략(전략 A: 공식에 수를 대입하기, 전략 B: 구체적인 그림을 그리거나 이용하기, 전략 C: 변수 간의 관계에 주목하기)이 추출되었다. 변수 간의 관계에 주목하여 문제를 해결하려는 전략은 소수의 아동에게서만 관찰되었으며, 그림이나 공식에 대입하는 전략으로 문제 해결이 어려운 경우에 이 전략을 사용하는 아동들의 수가 다소 증가하였다. 밑변과 넓이 또는 높이와 넓이의 관계에 주목한 아동들은 소수 있었으나, 밑변과 높이의 관계에 주목하여 문제를 해결하려 한 아동은 없었다.

• 한국산림과학회지
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• 제2권1호
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• pp.48-51
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• 1962

한국(韓國)의 원산죽(原産竹)으로서 중요(重要)한 것은 솜대, 왕 대, 이대 등이나, 중국원산(中國原産)으로서 알려져 있는 맹종죽(孟宗竹)(Phyllostachys edulis Riv.)은 지금으로부터 약(約) 220년전(年前)에 유구(琉球)를 지나 일본(日本)으로 전파(傳播)되고 다시 우리나라에도 수입(輸入)되어 남부지방(南部地方) 일부(一部)에는 그 재배(栽培)가 되고 있다. 재질(材質)이 연(軟)하고 공예적성질(工藝的性質)은 참대, 솜대등만 못하나 줄기가 굵고 또 아름다운 광택(光澤)도 가지고 있어서 실내(室內)의 장식품(裝飾品)으로 쓰이며 죽순(竹筍)은 이름 높다. 일반삼림수목(一般森林樹木)에 대(對)한 수고(樹高), 직경(直徑), 재적성장(材積成長)에 대(對)한 내용(內容)은 어느정도(程度) 밝혀져 있으나 우리나라의 죽성장(竹成長)의 내용(內容)에 대해서는 알려진 것이 거의 없다. 대나무는 단자엽식물(單子葉植物)로서 일반(一般)의 다른 수목(樹木)과는 형태적(形態的)으로나 생리(生理) 생태면(生態面)으로 특이(特異)한 점(點)을 구유(具有)하고 있어서 이러한 내용(內容)의 분석(分析)은 죽림경영기술(竹林經營技術)에 또 순생물학적면(純生生物學的面)에 이바지하는 바가 있다고 믿는다. 이곳에서는 이리시(裡里市) 농과대학소속(農科大學所屬)의 맹종죽림(孟宗竹林)에서 관측(觀測)된 것을 자료(資料)로해서 검토(檢討)하였다.

• 한국의상디자인학회지
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• 제15권2호
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• pp.15-26
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• 2013

The purpose of this study is to offer basic data for designing and making of brassiere with the consideration of the physiological nature of man. Each of 3/4-cup wired upward-support-type Mold Bra of 75 size with basic pad made at three representative domestic companies (A, B and C Company) was selected for analysis of pattern and components. The following is the result of this study. 1. That Company A's bra had the highest cup, relatively narrow width, the widest front-center and the highest front center at front pad. That of Company B had relatively short wing over the base and much difference at the height of cup depending on the presence of wire. That of Company C had low and wide cup, the widest bust span and the front center width, the front center height of front pad, the base length of front pad and the length of wings were observed to be of the figures between those of Company A and B. 2. The Bra of Company A had the biggest front center angle of $6^{\circ}$, while that of Company C had the biggest wing angle of $18^{\circ}$. The Bra of Company B showed the biggest difference of patterns depending on the presence of wire. Those of Company A and C showed very similar shape when wire was inserted. 3. The order of making brassiere is following: making of exterior mold cup${\rightarrow}$ sewing exterior cup and circumference of mold${\rightarrow}$ sewing base and wings${\rightarrow}$ sewing binding tape to base${\rightarrow}$ sewing cup and main pad${\rightarrow}$ sewing binding tape to upper sides and upper part of wings${\rightarrow}$ sewing wire-tape to interior base of cup${\rightarrow}$ inserting of wire inside wire-tape${\rightarrow}$ sewing hook & eye on the back of wings${\rightarrow}$ sewing shoulder string.

• 대한한방부인과학회지
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• 제30권3호
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• pp.20-28
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• 2017

Objectives: This review aims to report the efficacy of Oriental herbal medicine for Female Idiopathic Precocious Puberty Methods: We searched clinical study about precocious puberty from Pubmed, OASIS, Korea Traditional Knowledge Portal and National Assembly Library up to July 2017. Results: Four case reports have been identified. Six cases in total were found. And in the four cases where estradiol (E2) levels were above the normal levels in pre-treatment, the figures dropped to the normal levels in post-treatment. In the three cases with breast development and breast pain in pre-treatment, symptoms improved after the treatment. And, the sustained growth of height was reported in the four cases with the treatment duration of 30 days or more. Conclusions: It has been identified that oriental medicine assisted improvements of hormone levels and breast pain and growth of height on patients with precocious puberty, yet more case reports and well-designed studies would be necessary to guide better oriental herbal medicine treatment of precocious puberty.

• 한국해안·해양공학회논문집
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• 제35권5호
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• pp.102-108
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• 2023

본 연구에서는 경사제 항내측 사면에 거치된 피복재의 안정성에 대한 단면수리실험을 수행하였으며, 항내 측 피복재로는 피복석을 적용하였다. 국내 항만 및 어항설계기준에서는 항내측 피복재의 중량산정 방법으로 상치콘크리트가 설치되지 않은 조건에 대하여 항내측 일부구간을 항외측 피복재와 동일 중량비의 피복재를 사용하도록 설계 도표로 제시하고 있다. 국내에 설계되는 대부분의 경사식 구조물은 상치콘크리트가 설치되어 있으며, 이에 대한 안정중량 산정 방법이 필요하다. 피해율 S = 2를 기준으로 안정파고를 산정하여 안정성을 검토하였으며, 소요중량은 상대여유고에 대한 항외측 피복재(테트라포드) 대비 항내측 피복석의 중량비로 제시하였다.

• 한국의류산업학회지
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• 제10권5호
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• pp.644-651
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• 2008

The health of foot is connected with individual's health and affects men's activity. In order to develope comfort socks, both foot size and foot shape must be considered. The purpose of this study was to categorize men's foot shape according to age using men's foot scan data (with 2005 Size Korea). Factor analysis, Cluster analysis, ANOVA, and Duncan's test were performed for statistical analysis of the data by SPSS Win 12.00 program. The results are as follows. 1. Nine factors constituting the men's foot were extracted through factor analysis and those factors comprised 77.7% of total variance. 2. On the basis of the cluster analysis, four different foot shapes were categorized. Cluster 1 was characterized by large in toe and ankle size. Cluster 2 was characterized by short foot length, low foot height, and small foot breadth/girth. Cluster 3 was characterized by large and high in foot height. Cluster 4 was characterized by short in foot length and large in foot breadth/girth. 3. Distribution of four foot shape clusters from 20 to 70 years in age above were categorized. For the 20 to 29 years in age, cluster 2, while for the over 30 years in age cluster 4 or cluster 3 is the most dominant foot type. A foot breadth in the 50 years over is wider size range than that in the below 49 years. The foot figures of elderly men over 60 years were smaller than those of below 60 years.

• 한국구조물진단유지관리공학회 논문집
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• 제14권3호
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• pp.123-130
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• 2010

본 논문에서는 기존 건축물의 내진성능을 향상시키기 위해 시공성과 설치 비용적인 측면에서 상대적으로 우수한 강재댐퍼를 대상으로 기존 개발된 장치와 새로 개발된 형상의 장치에 대한 평가를 해석적으로 수행하였다. 해석결과는 강도 및 에너지 소산능력으로 평가하였으며, 제안된 내력 산정식의 적용을 아울러 평가하였다. 연구대상 댐퍼의 스트럿 형상은 V형, S형이며, 댐퍼의 스트럿 높이와 각도를 주요 변수로 한 후 ABAQUS를 이용하여 유한요소 해석하였다. 해석은 최대변위를 50mm로 하고 점진적인 이력변위곡선을 적용하여 수행하였다. 항복강도, 최대강도, 에너지 소산능력 평가결과, V형 및 S형 모두 우수한 성능을 보유한 것으로 평가되었으며, 또한 스트럿 각도 $60^{\circ}$ 및 높이 140, 200 mm의 성능이 안정적인 것으로 평가되었다. 전체적으로는 S형의 응답이 V형보다 안정적인 것으로 평가되어, S형 강재댐퍼의 적용성이 V형보다 유리한 것으로 평가되었다.

• Steel and Composite Structures
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• 제16권3호
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• pp.325-337
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• 2014

The strength and buckling problem of a five layer sandwich beam under axial compression or bending is presented. Two faces of the beam are thin aluminium sheets and the core is made of aluminium foam. Between the faces and the core there are two thin binding glue layers. In the paper a mathematical model of the field of displacements, which includes a share effect and a bending moment, is presented. The system of partial differential equations of equilibrium for the five layer sandwich beam is derived on the basis of the principle of stationary total potential energy. The equations are analytically solved and the critical load is obtained. For comparison reasons a finite element model of the beam is formulated. For the case of bended beam the static analysis has been performed to obtain the stress distribution across the height of the beam. For the axially compressed beam the buckling analysis was carried out to determine the buckling load and buckling shape. Moreover, experimental investigations are carried out for two beams. The comparison of the results obtained in the analytical and numerical (FEM) analysis is shown in graphs and figures. The main aim of the paper is to present an analytical model of the five layer beam and to compare the results of the theoretical, numerical and experimental analyses.

• Safety and Health at Work
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• 제4권1호
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• pp.63-70
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• 2013

Objectives: This study is planned to assess the trend of occupational injuries in Korea from 2001 to 2010. Methods: Ten years of occupational injuries, from 2001 to 2010, were analyzed in order to investigate the changing profiles according to the various characteristics of injuries; economic sectors, age of the injured, and type of injuries. The changing profile of occupational injuries was investigated by comparison with an index-created relative value based on the number of cases of reference category. Results: The fatalities of construction, forest, agriculture, and service show the increasing trend. The nonfatal occupational injuries of the manufacturing sector were higher than those of other sectors in every year but the fatal occupational injuries of construction workers were higher than those of the manufacturing sector. Occupational injuries occurring due to amputation and those of slip and trip increased. The number of occupational injuries for the worker groups of 24 years old and below decreased and 45 years old and above increased. In comparison to the figure of fall from height, the figures of slip and trip or caught in equipment are higher in every calendar year. Conclusion: This study find out construction, forest, agriculture, and service sectors, aged worker with 45 years old and over can be target population for the strategies of occupational safety.

• 패션비즈니스
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• 제11권4호
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• pp.111-119
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• 2007

This research analyzes how female college students' perception of somatotype-self and their satisfactions with their somatotype-self affect their appearance-management behaviors. The result is as follows: 1)An analysis of subjects' physical characteristics revealed that the average figures of their body sizes were within the normal boundaries. The average Quetelet Index of the subjects, which determines obesity of adults, was slightly below the nationwide physical standard of Korea. 2)The subjects' satisfaction with their each body part shows that the women were unsatisfied with every body-part measurement; height, bust size, waist size, hips size and particularly weight. 3)While most of the respondents recognized that sizes of their body parts were average, they were not happy with their body sizes. 4)Three factors were recognized from the study of appearance-management behaviors of the subjects; we defined them as 'Appearance Management', 'Weight Management', and 'Satisfaction with one's Appearance.' The study showed that the fatter, the more a subject controlled her weight. 5)A correlation study between one's perception of her body and her appearance-management behavior found that the more obese a subject was, the harder the subject was controlling her weight.