• Title/Summary/Keyword: life history

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The Life of Fourier, The minor Lineage of His Younger Scholars and a Theorem of Telyakovskii on $L^1$-Convergence (푸리에 일생, 푸리에 후학의 소계보와 $L^1$-수렴성에 관한 테라코브스키의 정리)

  • Lee, Jung-Oh
    • Journal for History of Mathematics
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    • v.22 no.1
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    • pp.25-40
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    • 2009
  • This study concerns with John B. Fourier' s life, his teachers, his younger scholars and the $L^1$-convergence of Fourier series. First, we introduce the correlation between the French Revolution and Fourier who is significant in the history of mathematics. Second, we investigate Fourier' s teachers, students and a minor lineage of his younger scholars from 19th century to 20th century. Finally, we compare the theorem of Telyakovskii with the theorem of kolmogorov on $L^1$-convergence of Fourier series.

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Student's Mathematization of Equations in the Middle School Using the History of Mathematics (수학사를 활용한 중학교 방정식에서 학생의 수학화)

  • Choi-Koh, Sang-Sook;Choi, Kyung-Hwa
    • The Mathematical Education
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    • v.45 no.4 s.115
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    • pp.439-457
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    • 2006
  • This research was to understand the features of mathematization and didactical phenomenology, in a way that was not a routine calculation of equation, rather a complete comprehension by the reinventing historical principles of the equation. To achieve the purpose of this study, one-mate middle school student participated in the study. Interview and observation were used for collecting data during the student's performance. The results of research were: First, the student understood the mathematical concepts from a real life and developed the abstract concepts from it, which were very intimately related with his life. Second, the skill and formula definition were accomplished with the accompanying predicted and consequently derived mathematical concepts. Third, through the approach of using the history of mathematics, he became more interested in what he was doing and took lessons with confidence. Forth, the student performed his learning based on the historical reinventing principle under the proper guidance of a teacher.

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Policy and Trends of Reconstruction of Dilapidated Houses in Yanbian Korean-Chinese Autonomous Prefecture (연변조선족자치주의 농촌위험주거 개조정책과 경향)

  • Jin, Chang-Jie;Li, Jin-Gang;Kim, Wang-jik
    • Journal of architectural history
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    • v.29 no.5
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    • pp.41-50
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    • 2020
  • Architecture is the historical record of a society. Residential culture is one of the cultures, and includes all the living and customs of people living in the current society. In particular, the Native residence has the research value of changing the living culture because it contains the lives of farmers. The residential culture of the Korean-chinese people contains the poor, agricultural, and immigrant life that began as a livelihood. Therefore, residential culture is an important part of the Korean-chinese culture. However, due to population movement and urbanization, the deepening and aging of the rural community caused the destruction of the residential culture, and the residentials that had been vacant for many years were destroyed, and a large number of risky residential reconstructions are underway. At the point of progress from a voluntary personal building culture to a public building culture built by the government, a study on Renovation of dilapidated Building and a more reasonable residential reform plan is needed. Our housing culture should not only improve the living environment of current life, but also inherit the housing culture contained in history.

Study on Effective Arrangement of Mooring Lines of Floating-Type Combined Renewable Energy Platform (부유식 복합 재생에너지 플랫폼 계류선의 효과적 배치에 관한 연구)

  • Choung, Joonmo;Jeon, Gi-Young;Kim, Yooil
    • Journal of Ocean Engineering and Technology
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    • v.27 no.4
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    • pp.22-32
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    • 2013
  • This paper presents the conceptual design procedure for the taut-leg mooring lines of a floating-type combined renewable energy platform. The basic configuration of the platform is determined based on an understanding of floating offshore plants. The main dimensions and mass distribution are determined based on a hydrostatic calculation. To identify the motion history of the floating platform and the tension history of the mooring lines, a hydrodynamic analysis is executed using Ansys.Aqwa. This helps in the selection of the best configuration for the mooring system such as the number of mooring lines, wire types, anchored positions, etc. In addition, the fatigue life of the mooring lines can be predicted from the tension history using the rain-flow cycle counting method.

Influence of the Military Background of the Lee-Jema on His Medical Thoughts through 『Dongmuyugo·Jipungjo』 (『동무유고(東武遺稿)·지풍조(知風兆)』를 통해 본 이제마의 군사학적 배경이 그의 의학 사상에 미친 영향)

  • Choi, Sung-Woon;Hwang, Jihye;Kim, Namil
    • The Journal of Korean Medical History
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    • v.32 no.2
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    • pp.29-41
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    • 2019
  • We compared the texts of the two types of military books, 『Mubiji』 and 『Yungsalyujeom (戎事類占)』. In this research, it is proved that Lee-Jema transcribed a segment on martial mantic in 『Mubiji (武備志)』 which is a book on military studies and named it 「Jipungjo (知風兆)」 since he had practical interest in military affairs. Lee-Jema had been serving as a military officer when his peculiar thought was beginning to unfold and maintained his interest in military affairs until his latter years. It is necessary to take a military studies based approach to comprehend Lee-Jema's thought since military affairs had great influence on his life.

A Study of Maeng Hwa-seop's Life (소애 맹화섭 선생의 생애에 대한 연구)

  • PARK Yung-hwan
    • The Journal of Korean Medical History
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    • v.35 no.1
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    • pp.101-118
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    • 2022
  • Maeng Hwa-seop (1915-2002) was born in 1915 in the Pundang neighborhood of Tolma township in Kwangju prefecture. After graduating from Pangyo primary school, he got a job at House of Gold and Jade (Kŭmhodong) in Dangjutong at the age of 17 and started learning Korean medicine. In 1939, he worked as a rural government official in Kwangju prefecture and became famous as a good doctor. In 1957, he got a license in Korean medicine and in 1958, he opened the Maeng Hwa-seop Korean medicine clinic in Anam-dong 5-ga. He started a clinical lecture, which began in 1970 for Professor Maeng Woong-jae, continued until 2001 and trained many students. Maeng died in May 2002 at the age of 88. He left clinical records as an outstanding clinician. He was not only famous among Korean medical doctors, but also a great scholar who was widely respected for his noble personality. His book, Guide to Medical Prescriptions (Pangyak chich'im 1976), is a clinical textbook and history book representing Korean medicine in the 20th century, and is still widely used in medical contexts.

A Case Study of Experienced Docent's Expertise in Science Exhibit Interpretation Using a Life History Approach (생애사적 방법으로 탐색한 경력 도슨트의 과학전시해설 전문성 연구)

  • Lee, Jung-Hwa;Park, Young-Shin
    • Journal of the Korean earth science society
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    • v.34 no.3
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    • pp.257-273
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    • 2013
  • The purpose of this study was to describe how one woman became a science docent's exper and how she developed expertise in her field of work as a docent in science museum. A life history approach, one of the qualitative research methods was employed in this study. A docent Ms. Park, had her career as a docent for eight years and she was selected through the procedures as follows. The $1^{st}$ phase of selection, the researcher contacted 56 docents who were working using a convenience sampling method. In the $2^{nd}$ phase of selection, 11 of them were then selected on purpose for further study. Finally docent Paek was selected as a case for this study on the basis of her responses to survey questions and interviews as well as her willingness to participate. Research data were collected through mainly interviews, participant observations, and docents' artifacts. We analyzed data to reveal Ms-Park's life history of how she became a docent, how her work was as a docent, and what efforts she made to become an expert as a docent of science museum. Findings are as follows. First, docent Park demonstrated strong educational beliefs that influenced her field work, as the beliefs have continuously been formed throughout her life experiences. Second, she acquired and organized her practical knowledge of exhibit interpretation through real activities and experiences interacting whith visitors and demonstrating exhibits in science museums. Third, docent Park showed her ability to make full use of surroundings and resources available for developing her expertise on exhibit interpretation more effectively. With these findings in mind, we suggest that a well established docent system as well as its operation, and physical support be needed for increased docents' expertise and meaningful education in science museum.

The Case-Control Study on the Risk Factors of Stroke in Korean Adults -Past Medical History, Life-Style Factors, Serum Lipid Level, Anthropometric Indices- (뇌졸중의 위험요인에 대한 환자-대조군연구 -과거병력, 생활습관, 혈청지질 및 비만요인을 중심으로-)

  • Ko, Soeng-Gyu;Jung, Yong-Soo;Park, Kyoung-Hoon;Bu, Song-Ah
    • The Journal of Internal Korean Medicine
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    • v.22 no.3
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    • pp.423-430
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    • 2001
  • Objects: The purpose of this case-control study was done to examine the relationship between stroke prevalence and the anthropometric indices(body mass index(BMI), modified Broca's method(Broca's index), waist circumference(WC), waist-hip ratio(WHR)), dyslipidemia, past medical history(heart disease, hypertension, diabetes mellitus(DM)), life-style factors(smoking, drinking) in Korean adults. Methods : The study group consisted of neurologically confirmed 116 stroke patients as the case group and 116 non-stroke patients as control group. Obesity were defined as $BMI{\geq}25kg/m^2,\;Broca's\;index{\geq}30%$, WC >94cm in male and WC >80cm in female, $WHR{\geq}0.9$ in male and $WHR{\geq}0.8$ in female. Oyslipidemia were defined as total $cholesterol{\geq}200mg/dl,\;triglyceride{\geq}200mg/dl,\;HDL-cholesterol {\leq}35mg/dl,\;LDL-cholesterol{\geq}160mg/dl$. Information on life-style factors and past medical history was obtained from personal interview. The analysis of the data was done by means of chi-square test(Pearson's chi-square test, Fisher's exact test) and student t-test. Results: The results were as follow. In the study group: Hypertension had a 4:05 odds ratio, Broca's $index{\geq}30%$ had a 1.98 odds ratio, WC >94cm in male had a 2.17 odds ratio, WC >80cm in female had a 2.80 odds ratio, $WHR{\geq}0.9$ in male had a 4.66 odds ratio, $WHR{\geq}0.8$ in female had a 5.35 odds ratio, but heart disease, DM, life-style factors, serum lipid and 8MI had no direct relationship with odds ratio(nonsignificant). By student t-test, risk factors for stroke were found to be total cholesterol(p=0,025), LDL-cholesterol(p=0.013), WC(p=0.000) and WHR(p=0.000). Conclusions: This study suggests that people should be advised to control hyperlitension, hyperlipidemia and obesity since these carry a risk of stroke.

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Egg Development and Early Life History of the Anadromous Fish Tribolodon hakonensis in the Seomjin River, Korea (섬진강에서 채집한 황어(Tribolodon hakonensis)의 난 발생 및 초기생활사 연구)

  • Choi, Sungkook;Lee, Wan-Ok;Hong, Yang-Ki;Song, Mi-Young
    • Korean Journal of Ichthyology
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    • v.33 no.4
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    • pp.262-272
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    • 2021
  • The egg development and early life history of Tribolodon hakonensis that collected from the Seomjin River were studied. The fertilized eggs of the T. hakonensis were slightly adhesive and separated with a yellow yolk and no oil globule. The size of the eggs was an average of 2.89 mm (2.79~2.96) in diameter. Fifty percents of the embryos were hatched in about 63 hrs after fertilization at water temperature of 20℃. The newly hatched larvae showed average 6.92 mm (6.09~7.60) in total length. At 8 days after hatching, they were 13.75±0.67 mm (n=10) in total length and their yolk sacs were completely absorbed, opening mouth and anus (postflexion larvae stage). At 40 days after hatching, they became juvenile and reached 26.99±1.82 mm (n=10) in total length and all their fin rays were formed. At 137 days after hatching, the young fish were 72.63±10.7 mm (n=10) in total length and their body shape, color and behavior were similar to those of adult fish. The size of eggs and the larva after hatching significantly affected the initial growth among groups of genus Tribolodon, and the hatching time of fertilized eggs and the growth rate of the early life history according to the water temperate were different.