• Journal of the Korean Society of Manufacturing Process Engineers
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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.

• Journal of the Korean Society of Manufacturing Process Engineers
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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.

• Journal for History of Mathematics
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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.

• Journal of Family Resource Management and Policy Review
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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.

• Journal of Korean Society of Archives and Records Management
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• 제15권4호
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• pp.49-76
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• 2015

The personal history of individuals directly and vividly reflects the courses of their life and the society of which they are a part. It has become a meaningful part of the social landscape today to pursue efforts to understand humans and humanity correctly and properly through the windows of private records. Notably, the significance of keeping private records on the relationship between individuals and the society of which they are a part lies in the fact that they cooperate to build a foundation on which they can prosper together. One of necessary things to be done to fully appreciate the values of such private records is to perform serious analyses on particular individuals who are behind those records. Developing and refining methods of life history research such as time-line interviews exert positive influence in setting up a direction for private documentation systems where private records are collected and maintained.

• The Korean Journal of Archival Studies
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• 제30호
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• pp.57-88
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• 2011

Oral history is the work to make the record of the verbal content recreated by the memories of the survivors. Oral history recording is accomplished through the collaboration of the interviewee, the interviewer, the cameraman, the recorder, the transcriber and etc. Therefore, it is important for the context at the time of the production to be expressed. So planning for the collection of oral records, the collection of oral records, and their preservation and maintenance should be managed systematically. This study, being started from this sense of problem, designed conceptual model of metadata to well reflect the contextual characteristics of the oral records of the women life of among the oral records and extracted the elements through this. The whole process of records management including from planning, production, preservation, management, and leading to use, related to the oral records of the women life, was classified into a hierarchy. It also proposed the system which can express the characteristics of the 'gender' through authority records and subject thesaurus.

• Phonetics and Speech Sciences
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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.

• Journal for History of Mathematics
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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.