• 제목/요약/키워드: a life history study

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흰줄납줄개(Rhodeus ocellatus)와 줄납자루(Acheilognathus yamatsutae) 잡종의 초기생활사 특징 (Early Life History Characteristics of an Induced Hybrid of Rhodeus ocellatus and Acheilognathus yamatsutae)

  • 박재민;한경호
    • 한국수산과학회지
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    • 제55권2호
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    • pp.137-145
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    • 2022
  • This study was conducted to identify the taxonomic differences in the characteristics of Rhodeus ocellatus and Acheilognathus yamatsutae during their early life history via an interspecific hybridization experiment. Results showed that the hatching rates of the cross-bred eggs were 60% for cross OY (R. ocellatus ♀×A. yamatsutae ♂) and 70% for cross YO (A. yamatsutae ♀×R. ocellatus ♂). The dorsal fin rays of YO were similar to those of R. ocellatus. The hybridization test of A. yamatsutae and R. ocellatus living in the same water stream revealed that no interspecies reproductive isolation occurred. OY and YO showed similar maternal and paternal characteristic. The juvenile of OY did not resemble both paternal and maternal fin rays, indicating a difference. The hatching larvae of the hybrids showed the morphological characteristics of their parents but varied in terms of the shapes of their parts.

구술 기록의 공공성 (A Study on the Publicness of Oral Records : The Cases of 2021 Digital Life History Archiving)

  • 김택호
    • 기록학연구
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    • 제79호
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    • pp.443-469
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    • 2024
  • 본 연구는 다양한 기관에서 생산하고 있는 구술 기록과 구술 기록 생산과정에 공론장 형성 기능이 있으며, 이것이 구술 기록의 공공성이라는 점을 드러내려는 데에 목적이 있다. 연구는 이를 위해 공론장과 공공성을 논의하고 분석한 철학, 사회학, 정치학 분야 선행연구를 살펴보면서 공론장의 기능과 공공성의 의미를 규정하고, 그것이 구술 기록의 일반적인 특성과 어떤 연관성이 있는지 확인했다. 본 연구는 이와 같은 논의의 구체성을 확보하기 위해 문화체육관광부에서 주관하고 (협)아카이빙네트워크연구원이 수행했던 「2021년 디지털 생활사 아카이빙 사업」의 성과를 분석하였다. 결과적으로 사업에 참여했던 시민 면담자들의 구술 기획과 구술 기록, 구술 기록 해설로부터 공공성을 강화하는 데 기여할 수 있는 요소를 다수 찾아낼 수 있었다.

Risk Factors for Positional Vertigo and the Impact of Vertigo on Daily Life: The Korean National Health and Nutrition Examination Survey

  • Park, Moo Kyun;Lee, Doh Young;Kim, Young Ho
    • Journal of Audiology & Otology
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    • 제23권1호
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    • pp.8-14
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    • 2019
  • Background and Objectives: This study aimed to analyze risk factors for positional vertigo (PV) and the influence thereof on daily life and subjective quality-of-life (QoL). Subject and Methods: A cross-sectional study was conducted using data of the 2010 Korea National Health and Nutrition Examination Survey. The study population consisted of 1,274 individuals aged >40 years for whom complete dizziness-related data were available. Blood and urine tests were performed, and nutritional intake, QoL, and subjective health status were measured using a questionnaire. The associations between PV and blood/urine test data and nutritional intake were evaluated via multiple logistic regression analysis. Results: A history of PV within the previous year was reported by 98 individuals (7.7%). Advanced age and female gender were both significantly associated with such a history. Serum hemoglobin, creatinine, and triglyceride levels correlated significantly with a history of PV. Carotene, vitamin A, and vitamin B2 intakes were significantly lower in individuals with PV. Multivariate analysis revealed that only age was significantly associated with a history of PV (p=0.003). Although subjective health status score was not significantly lower in subjects with PV, subjective impairments in mobility, self-care, the performance of usual activities, and anxiety/depression were more prominent in individuals with PV. A fall history and limitations of activity were also significantly higher in individuals with PV (p<0.001 and p=0.003, respectively). Conclusions: Age was a risk factor for PV, which affected most QoL parameters, fall frequency, and the performance of normal activities.

Risk Factors for Positional Vertigo and the Impact of Vertigo on Daily Life: The Korean National Health and Nutrition Examination Survey

  • Park, Moo Kyun;Lee, Doh Young;Kim, Young Ho
    • 대한청각학회지
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    • 제23권1호
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    • pp.8-14
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    • 2019
  • Background and Objectives: This study aimed to analyze risk factors for positional vertigo (PV) and the influence thereof on daily life and subjective quality-of-life (QoL). Subject and Methods: A cross-sectional study was conducted using data of the 2010 Korea National Health and Nutrition Examination Survey. The study population consisted of 1,274 individuals aged >40 years for whom complete dizziness-related data were available. Blood and urine tests were performed, and nutritional intake, QoL, and subjective health status were measured using a questionnaire. The associations between PV and blood/urine test data and nutritional intake were evaluated via multiple logistic regression analysis. Results: A history of PV within the previous year was reported by 98 individuals (7.7%). Advanced age and female gender were both significantly associated with such a history. Serum hemoglobin, creatinine, and triglyceride levels correlated significantly with a history of PV. Carotene, vitamin A, and vitamin B2 intakes were significantly lower in individuals with PV. Multivariate analysis revealed that only age was significantly associated with a history of PV (p=0.003). Although subjective health status score was not significantly lower in subjects with PV, subjective impairments in mobility, self-care, the performance of usual activities, and anxiety/depression were more prominent in individuals with PV. A fall history and limitations of activity were also significantly higher in individuals with PV (p<0.001 and p=0.003, respectively). Conclusions: Age was a risk factor for PV, which affected most QoL parameters, fall frequency, and the performance of normal activities.

Fuel Consumption Prediction and Life Cycle History Management System Using Historical Data of Agricultural Machinery

  • Jung Seung Lee;Soo Kyung Kim
    • Journal of Information Technology Applications and Management
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    • 제29권5호
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    • pp.27-37
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    • 2022
  • This study intends to link agricultural machine history data with related organizations or collect them through IoT sensors, receive input from agricultural machine users and managers, and analyze them through AI algorithms. Through this, the goal is to track and manage the history data throughout all stages of production, purchase, operation, and disposal of agricultural machinery. First, LSTM (Long Short-Term Memory) is used to estimate oil consumption and recommend maintenance from historical data of agricultural machines such as tractors and combines, and C-LSTM (Convolution Long Short-Term Memory) is used to diagnose and determine failures. Memory) to build a deep learning algorithm. Second, in order to collect historical data of agricultural machinery, IoT sensors including GPS module, gyro sensor, acceleration sensor, and temperature and humidity sensor are attached to agricultural machinery to automatically collect data. Third, event-type data such as agricultural machine production, purchase, and disposal are automatically collected from related organizations to design an interface that can integrate the entire life cycle history data and collect data through this.

신장도(腎臟圖)의 형태요소와 그 변이(變異)에 대한 연구 (Factors of Variation in Diagrams and Location of Kidney)

  • 조학준
    • 한국의사학회지
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    • 제31권1호
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    • pp.23-42
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    • 2018
  • This study examines the variation in diagrams of the kidney, and the effects on location of the Life Gate as a result. My study analyzes diagrams of kidney form and location, such as appearance, the vertebral spine, ShenXi, and "Life Gate", and also explores the causes for such variations. The kidney is commonly described as having the shape of a bean, which throughout medical history has showed almost no variation. The spine was initially described with a total of 21 vertebrae, and later with a range of 19-25 vertebrae. Regarding the height of kidney in relationship to the spine, it was initially described as beginning at the 14th vertebrae, and later changed to the 15th or 17th vertebrae. However, there have been no changes in the perception of the height of kidney. Initially, the location of the Life Gate could not be identified. Three different suggestions of its location were found throughout historical literature, including: (1) at or within the right kidney; (2) between two kidneys; and (3) between 14th-15th spine. There were also variations noted in the process of copying diagrams of kidney in many books not only because the work of copying was not precise, but also because each medical practitioner had a different interpretation of the kidney's form and function in Traditional Korean and Chinese Medicine. It appears that some practitioners may have been influenced by their understandings of theory of Life Gate.

Analysis of effects of burning in grasslands with quantifying succession stages by life-history traits in Kirigamine, central Japan

  • Kato, Jun;Kawakami, Mihoko
    • Journal of Ecology and Environment
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    • 제36권1호
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    • pp.101-112
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    • 2013
  • To quantitatively analyze the effects of burning, we conducted a vegetation survey in the grasslands in Kirigamine, central Japan. We classified each species into stages of succession based on the life-history traits of the species and defined the score of the species in each stand based on the classification. We weighted the scores with a v-value, the product of coverage and height in the quadrat, and summed them to calculate the index of dynamic status. With these indices, we were able to quantitatively compare the stands in the study area and discern minute differences between the stands with different lengths of restoration periods since the disturbance of burning. These indices correlated with the v-value of trees, suggesting that the disturbance of burning seemed to affect the trees in the stand. We then calculated the growth of the tree species Pinus densiflora to evaluate its contribution to the index of dynamic status.

한국 여성 유방암의 위험요인 분석 (A Study on the Risk Factors for Breast Cancer in Korean Women)

  • 윤귀옥;박형숙
    • 기본간호학회지
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    • 제8권1호
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    • pp.7-23
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    • 2001
  • This study was done to provide basic data on prevention of breast cancer by identifying and analyzing risk factors for breast cancer in Korean women. The data were collected from three hospitals. The data from Jan. 1995 to Dec. 1997 was based on the patient recordings and personal contacts if possible. Data from 1998 to 1999 was collected from 280 inpatients and outpatients diagnosed as breast cancer. From this data, information about the risk factors of breast cancer could be acquired. The factors are scaled according to the degree of risk. Menstrual history, obstetrical history, family history. lactation period, life style were given 5 point, and body mass index was given 4 point. Using one-way ANOVA. the most important risk factors were identified and analyzed by multiple regression. The conclusion of this study are as follows : General factors which would show an effect on the results of the multiple regression included risk factors such as menstrual history, obstetrical history, lactation period, family history, and life style factors including mortal state, monthly income, educational level, job and age. Family history(R=0.481) was found to be the highest risk factor(23.1%) affecting breast cancer risk. The next factors were dying hair(R=0.603), drinking(R=0.846), body mass index(R=0.885), smoking(R=0.916), age of menopause(R=0.937), pregnancy age of first full-term(R=0.957), eating vegetable(R=0.980) and the number of full term pregnancies in that order. The sum total(R=0.986) of all the above factors accounted for 97.3% of the risk of breast cancer for Korean women. In conclusion, it was found that family history and dyeing hair were the highest risk factors for breast cancer. It is recommended that those with a family history of breast cancer should have regular breast examinations, and those who often dye their hair should reconsider this practice.

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성악가의 음성위생 습관과 한국어판 음성관련 삶의 질(K-VRQOL) 특성 (Voice hygiene habits and the characteristics of Korean Voice-Related Quality of Life (K-VRQOL) among classical singers)

  • 강하늘;김선희;유재연
    • 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.

거주자 생활중심으로 본 경기 고양 전통민가 연구 - 폐쇄형 ㄱㄴ자집을 중심으로 - (A Study on the 'Closed ㄱㄴ Type' of Traditional Folk Housing in Goyang, Gyonggi-do, Focused to Dweller's Life)

  • 이희봉
    • 건축역사연구
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    • 제14권3호
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    • pp.53-76
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    • 2005
  • Through a field study of the folk houses, 'Closed ㄱㄴ Type' in Goyang-si, Gyonggj-do, focused on the dweller's life by the method of ethnographic interview, observation, and physical survey. L and opposite L type of inner and outer buildings form a closed inner court, and innermost backyard for woman is enclosed by fence. Form and space of the house contains dweller's traditional life. Outer space of a front gate becomes semiprivate space, for thrashing and piling up harvest and raising vegetables and pigs. Confucius principle does not fully dominate dweller's life of ancestral rite at Daecheong floor, and separation of man's and woman's quarter. Superstitious worship activities took place for lord of site and house. In everyday life, Anbang, inner main room, is assigned for parent's quarter instead of woman's quarter, and Geornbang, next room, was for son's family. Anbang has symbolic meaning for a place of deathbed. House contains agricultural activities, crop harvesting, thrashing, putting into storage, hulling rice, and keeping grain near kitchen. At present, rooms are needed more; sheds are made into rooms, rooms are enlarged toward outside, half outside space like Daechong floor becomes interior space by sash screen. And modern facilities of kitchen and bathroom are equipped for convenience. At the end, meaning and generative principle of those forms are discovered.

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