• 한국기계가공학회지
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• 제10권4호
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• pp.88-95
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• 2011

In this study, the deformation, stress, vibration, fatigue life and the probability of damage are analyzed at the pedal applied by the force of 300N. The maximum stress at the lower of pedal is shown as 20.801MPa. And the maximum displacement is 0.85mm at the maximum response frequency as 3800Hz. Among the cases of nonuniform fatigue loads, 'SAE bracket history' with the severest change of load becomes most unstable but 'Sample history' becomes most stable. In case of 'Sample history' with the average stress of 0 to $-10^{5}MPa$ and the amplitude stress of 0 to $10^{5}MPa$, the possibility of maximum damage becomes 0.6%. This stress state can be shown with 5 times more than the damage possibility of 'SAE bracket history' or 'SAE transmission'. The structural result of this study can be effectively improved with the design of pedal by investigating durability against its damage.

• 한국기계가공학회지
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• 제7권4호
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• pp.102-108
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• 2008

This study investigates the fatigue life and the damage possibility of cam shaft by the fatigue tool of Ansys. Among nonconstant fatigue loads, the case of 'SAE Bracket History' which is severest at the variation of load tends to be most unstable. The maximum relative damage in case of 'SAE Bracket History' is occurred near the average stress '0' and this case can be shown to have the possibility to take more damage than other cases. The case of 'Sample History' which becomes a little slow at the variation of load tends to be most stable. But there is most damaged possibility of 5% as 7 times at the range of mean stress from 0Pa to -104MPa and amplitude stress from 0MPa to 104MPa than the case of 'SAE Bracket History' or 'SAE Transmission'.

• Journal of the Korean Institute of Landscape Architecture International Edition
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• 제2호
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• pp.65-73
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• 2004

Contradictions often occur between the process of urban modernization and protection of history and culture, which have become the topics of current studies. The development of a city has its past, present and future while history and culture have their continued process. Culture is the sediment of history, left among buildings and merged in life. Exerting a subtle influence on the construction of a city and behaviors of citizens, culture is very important to the urban construction and is also the soul of a city and its buildings. Culture is closely bound up with inhabitants' life and the key to protect well the cultural features is to protect well historical and cultural venues. Qushuiyuan Garden is a venue for local folklore activities. The programming holds that folklore, historical and humane sceneries should be protected and left to our coming generations.

• 한국수학사학회지
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• 제13권2호
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• pp.1-12
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• 2000

The first life tables of the Korean, the so-called Chosun Joomin Saengmyong_Pyo were constructed by Misusima, the head professor, and his faculty members of Preventive Medicine Department, Division of Medical Science, Keijo Imperial University in 1937. The above mentioned life tables were based on the age specific mortality rates by the resident registration and the data of a couple of total population censuses conducted by the Governor of Chosun Government General in 1925 and 1930. And they revealed the following facts: (1) by the first Abridged Life Tables of Korean(Chosunin), the expected life span of Korean male and female were 32 and 35 from 1925 to 1930, respectively. (2) the infant mortality rate of Korean male and female were 252- and 230-person among 1000-born respectively. In conclusion, nobody knows the level of those Life Tables, but it is important in terms of that they are the origin of Korean life tables.

• 가족자원경영과 정책
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• 제17권2호
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• pp.219-241
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• 2013

The study explored the work-life balance of three dual-earning couples using the household economics approach according to the hermeneutics paradigm. Three families were analysed. The couples were interviewed individually with a non-structural interview guide about their work history and life history, and with a semi-structured interview and structured questionnaire about their work hours, childcare practice, husband-wife relation, household income and expenditure, and daily and weekly schedule. The results revealed the different paths and various strategies to adjust work-life balance among the cases. Strategies were discussed to facilitate changes in labor market policy, childcare policy, working place culture and family's daily life planning.

• 한국기록관리학회지
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• 제15권4호
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• pp.49-76
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• 2015

사회 속에서 살아가는 인간, 즉 개인이 생산한 개인 기록물에 대한 올바른 가치 판단을 통해 개인과 사회를 이해하고 사회발전에 기여하는 것은 의미있는 일이다. 흩어진 개인 기록물을 체계적으로 수집하고 관리 및 보존하기 위해서는 개인 기록물이 가진 가치를 충분히 이해해야 한다. 특히, 개인과 사회의 관계에 주목한 개인 기록물의 가치는 사회 구성원인 개인과 사회가 상호 협력을 통해 풍부하게 발전할 수 있는 토대를 마련한다. 그에 앞서 개인 기록물의 가치를 이해하기 위해 개인 기록물의 생산 주체인 개인에 대한 심층적인 분석이 이루어져야 한다. 생애사 연구의 구성요소와 특성을 개인 기록화에 적용하는 것은 생애에 바탕을 둔 개인 기록물의 가치 분석을 통해 올바른 가치가 지속될 수 있도록 하는 바탕을 마련한다는 점에 의미가 있다. 개인 기록물과 생애사 연구 간의 관계를 밝혀 개인 기록화의 필요성과 개인 기록화를 위한 심층적인 생애사 연구의 중요성을 연구한다. 또한 생애사 연구의 구성과 특성을 통해 기록학의 관점에서 적용할 수 있는 거시적인 방향을 제시하여 개인 기록화의 바탕을 마련한다.

• 기록학연구
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• 제30호
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• pp.57-88
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• 2011

구술은 생존자의 기억을 통해 재현된 내용을 기록화 시키는 작업으로 구술채록은 구술자, 면담자, 촬영자, 녹취자 등의 협업을 통해 수행된다. 따라서 구술기록물은 생산 당시의 맥락이 표현되는 것이 중요하며 구술기록물 수집을 위한 기획, 구술기록물 수집, 보존 및 관리가 체계적으로 이루어져야 한다. 이러한 문제의식에서 시작된 본 연구에서는 구술기록물 중에서도 여성구술생애기록물의 특성을 잘 반영할 수 있도록 메타 데이터의 개념 모델을 설계하고 이를 통하여 요소들을 추출 하였다. 여성구술생애기록물 관련 기획부터 생산, 보존, 관리, 이용에 이르는 기록 관리의 전 과정을 포함하여 계층으로 분류하였으며, 전거레코드와 주제 시소러스를 통해 '여성'의 특징을 표현할 수 있는 시스템을 제안하였다.

• 말소리와 음성과학
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• 제10권3호
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• pp.49-59
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• 2018

The purpose of this study was to investigate vocal hygiene habits and Korean Voice-Related Quality of Life (K-VRQOL) among classical singers. A total of 128 classical singers filled an online voice and K-VRQOL questionnaire, and the results were analyzed. In order to investigate the characteristics of K-VRQOL according to age groups, and the presence or absence of a history of voice problems, we conducted a two-way ANOVA. The results are as follows. Of the 128 classical singers, 28 (21.9%) with a history of voice problems said that excessive conversation, singing practice, and yelling were the causes of their voice problems. The symptoms of voice problems were fatigue, loss of range, hoarseness, and breathiness. In addition, classical singers were less likely to smoke, or to drink alcohol or caffeine. The K-VRQOL was highly correlated with all sub-domains. There was a statistically significant difference according to age groups (p<.05) and history of voice problems (p<.01). There was no correlation between age groups and history of voice problems. Voice management is important because classical singers can ruin their voice by speaking, and the risk of voice disorder is high. Voice problems affect quality of life. In future studies, it is necessary to obtain information on the subjective voice characteristics of classical singers by examining the relationship between their voice hygiene habits and VHI, SVHI, and K-VRQOL.

• ALGAE
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• 제20권1호
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• pp.37-42
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• 2005

The morhology and life history of Stylonema cornu-cervi Reinsch from Japan were investigated. The species had multiseriate erect thalli from a basal cell. The thalli usually branched dichotomously, occasionally trichotomously near the base, and non-branched thalli were sometimes observed. A dichotomous branch on the upper portion near the base occurred only one time on each erect branch. Cells contained a stellate chloroplast, which was composed of a central rounded part with an obscure pyrenoid and 5-8 cup-like lobes connected to the central part by a small thin stipe. The biseriate part was observed on the six-celled stage in culture, and the grown thalli were multiseriate except for base and apices. Monospores forming from the immediate transformation of vegetative cells were observed. Thalli grew at 15-25$^{\circ}C$ and died at 10 and 30$^{\circ}C$. The fastest growth and maturation were observed under 25$^{\circ}C$ and 14L:10D. Although S. alsidii (Zanardini) Drew usually had uniseriate thalli, irregularly branched multiseriate thalli had been reported in cultures. It is possible that in the previous report the thalli were confused with S. cornu-cervi. In this report, S. cornu-cervi were distinguished from S. alsidii in that the branches were few, the multiseriate portions were observed on the early stage (six-celled stage), and the grown thalli were multiseriate except at the base and apices.

• 한국수학사학회지
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• 제11권1호
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• pp.47-51
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• 1998

We consider how the speculation of infinity has been established through Cantor's idea. Also this paper deals with a problem of infinity in view of the application of our real life, as well as the theoretical meaning.