• Proceedings of the KIEE Conference
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• 2003.10a
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• pp.19-21
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• 2003

In this paper, we studied on life-decision of underground cable of live-lines state. As all equipments have been wear, underground cables decided design-life on the whole 30 years because underground cable have been occurred aging as time goes. CV cable has been become about 30 years after installation in the South Korea, is come to a important point of time with estimation about life. Study target cable is 22 kV CV cables in this point of view and installation cable is about 10 years before and behind. Measurement method used dc leakage method of live-lines state that applied voltage of 50V in neutral point and data is analyzing result that is measured during 5 years. In this result, insulation resistance could confirm that change according to season and cause is effect of humidity, seasons and load current. Also, according as data is gone aging, insulation resistance by Weibull distribution could confirm functionally its decrease. As a result, the aging speed of cable that water tree is gone could confirm fastness very. Numerical analysis result, cable that water tree is not gone could confirm that life of cable that has passed 10 years remains about $10{\sim}20$ years.

• Journal of Chest Surgery
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• v.17 no.4
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• pp.804-810
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• 1984

Two hundred twenty one cases of open heart surgery were done in the Department of Thoracic and Cardiovascular Surgery, Pusan National University Hospital from July, 1981 to October, 1984. 1.There were 154 cases [73%] of congenital anomalies and 57 cases [27%] of acquired valvular heart diseases. Among the congenital cases, 128 cases were acyanotic and 26 cases were cyanotic. Among the 57 cases of acquired valvular replacement surgery, 3 cases had open heart commissurotomy, one had Kay annuloplasty. 2.The age distribution of the congenital acyanotic anomalies ranged from 5 to 32 years with mean age of 12.8 years, the congenital cyanotic anomalies from 3 to 29 years with mean age of 14.2 years and the acquired valvular diseases from 9 to 51 years with mean age of 30 years. The difference of sex distribution was no significance. 3.Three methods for debubbling process were used in our institute, in 133 cases, the vent was inserted into the left ventricular apex, in 61 cases inserted into the left atrium through right superior pulmonary vein and in 17 cases used needle aspiration only. 4.For cardioplegia, the GIK solution was infused repeatedly from 30 to 40 minutes interval and brought excellent results for myocardial protection during open heart surgery. 5.Overall mortality was 7.6%. The mortality along with each disease is 1.56% in congenital acyanotic cases, 26.9% in congenital cyanotic cases and 12.3% in acquired valvular disease.

• Journal of the Korean Society of Food Culture
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• v.35 no.3
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• pp.256-264
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• 2020

This paper provides basic data for product developers by investigating the consumption status, consumer perception, and consumer demand on products using Aster Yomena. Two hundred ninety-five people over 20 years of age were analyzed according to gender and age. In the purchase of Aster Yomena products, men were the higher purchasers except for powder. In age, noodles, wild vegetables, jangajji, tteok, and powder were consumed by those older than 30 years. In an analysis of purchase when developing Aster Yomena products, the male purchase intention was higher in all items except for kalguksu in the staple, and male purchase intention was higher in only bibimbapseasoning among aster powder addition sauce and all items in dessert. The purchase intention of those older than 30 years was higher in all items of staples, aster powder addition sause and sause The purchase intention of those older than 30 yearse was higher in green vegetables juice and milk tea among drink, and all items except ice cream among dessert. An analysis of the popularization of Aster Yomena revealed higher perceptions of men in the medium (TV, internet, online cafe, agro-fishery market), experience program (area tourism, exposition), and product development (convenience food, recipe development). The medium (agro-fishery market), experience program, and product development were more recognized in their 30s or more. The products with aster yomana require the most effective marketing to men 30 years and older, and require a strategy that will interest those in their 20s.

• Journal of Preventive Medicine and Public Health
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• v.48 no.1
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• pp.48-52
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• 2015

Objectives: This retrospective cohort study aimed at calculating some parameters of changes in the findings of the subsequent screening mammography (SSM) in female Korean volunteers. Methods: The study included screenees aged 30 to 79 years who underwent SSM voluntarily after testing negative in the baseline screenings performed between January 2007 and December 2011. A change to a positive result was defined as category 4 or 5 by using the American College of Radiology Breast Imaging Reporting and Data System. The proportion of results that had changed to positive (CP, %) was calculated by dividing the number of cases with results that were positive in the SSM by the total number of study participants. The rate of results that had changed to positive (CR, cases per 100 000 screenee-months) was calculated by dividing the number of cases with results that were positive in the SSM by the total number of months of the follow-up period. Results: The overall CP and CR in all age groups (n=77 908) were 2.26% and 93.94 cases per 100 000 screenee-months, respectively. The median CP interval in the subjects who had positive SSM results was 30 to 36 months, while that in the age group of 30 to 39 years was shorter. Conclusions: Different screening intervals should be considered among women aged between 30 and 59 years. In addition, a strategy for a screening program should be developed for the age group of 30 to 39 years, in particular.

• Clinical and Experimental Pediatrics
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• v.50 no.12
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• pp.1206-1211
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• 2007

Purpose : The aim of this study was to investigate the risk of low birth weight associated with delayed first childbearing in Korea. Methods : The national birth certificate data of the singletons and first babies in Korea from January 2001 to December 2003 (n=736,167) was used. Outcome measures were rates of low birth weight infant, very low birth weight infant between 6 maternal age group (<20 years, 20-24 years, 25-29 years, 30-34 years and >35years). Odd ratios were calculated by multiple logistic regression on marital state, maternal education, maternal occupation, paternal occupation, duration of marriage and address. Results : Compared with women aged 25 to 29 years, women aged 30-35 years, 35-40 years and over 40 years had higher odds ratios of low birth weight, odd ratios were 1.3, 2.1, 2.4 respectively. Even though adjusted by marital state, maternal education, maternal occupation, paternal occupation, duration of marriage and address, odds ratios were 1.3, 1.9, 2.0 respectively. Compared with women aged 25 to 29 years, women aged 30-35 years, 35-40 years and over 40 years had higher odds ratios of very low birth weight, odd ratios were 1.8, 3.3, 3.7 respectively. Even though adjusted, odd ratios were 1.6, 2.7, 2.6 respectively. Compared with the incidence of low birth weight in each maternal age, maternal education, marital state, married, high school graduated thirties women was lower incidence than unmarried, high school graduated twenties women. Conclusion : These findings suggest that delayed childbearing increase the risk of low birth weight and very low birth weight, but if pregnant women have better socioeconomic condition, the impact of advanced maternal age on the risk of low birth weight will be decreased.

• Journal of the Korean Home Economics Association
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• v.42 no.8
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• pp.169-185
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• 2004

This study was performed to investigate the characteristics of meal patterns among Koreans of different age groups. The study subjects consisted of preschool children (PC), elementary school children (EC), high school students (HS), college students (CS), and adults over 30 years old living in Seoul and the surrounding areas. A dietary survey was conducted using 24-hour recall method from 1996-1998 and data were collected from 2392 subjects. The subjects over 30 years old were classified as 30∼49 years, 50∼69 years, and over 70 years. EC, HS, and CS groups consumed less than 20％ of their total energy intake from breakfast. PC and EC consumed over 30％ of their energy from snacks. In all age groups, the proportion of subjects who skipped a meal was highest for breakfast and lowest for dinner. Especially, 31.4％ of the CS group skipped breakfast. Breakfast and snacks provided higher quality meals than the others when each meal was assessed by the index of nutritional quality (INQ). Especially, lunch of the HS group, each meal of the EC group and subjects over 70 years of age had a lower diet quality than the others did. The major snack items for PC, EC, HS, and CS groups were milk, ice cream, and snack cakes, but those for subjects over 30 years of age were fruits. The PC group obtained 35.5％ of their energy from snacks, but the proportion of snack energy decreased with increasing age. PC and EC groups obtained a great proportion of calcium, vitamin B2, fat, and cholesterol intake from snacks. Snack foods provided 53.2％, 42.4％, 45.4％, and 24.6％ of those nutrients, respectively, for the PC group and 54.2％, 43.5％, 37.4％, and 26.8％, respectively, for the EC group. These results suggested that each age group had specific meal patterns. Especially, breakfast and snack intake seemed to complement overall diet quality. However, more intervention is needed to improve overall dietary nutrition, e.g., efforts to decrease fat and cholesterol proportion and increase breakfast consumption. These dietary characteristics among different age groups present foundation data for the development of methods to resolve the nutritional problems of each age group.

• The Journal of the Korean life insurance medical association
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• v.3 no.1
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• pp.256-268
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• 1986

We'd experienced 172 cases of fatty liver among 3,713 cases, that was examined by ultrasonography at medical department, Dae Han Kyoyuk Ins. company for recent one year from november, 1984 to November, 1985. The conclusions are as follows; 1. The possessing rate of fatty liver is 4.63% in total caees 138/2234 male(6.18%), 34/2234 female(2.3%) and that in male is 2.7 times than female. 2. In the distribution of fatty liver for age, the group of $21{\sim}30$ years are 9/564 cases(1.6%), the group of $31{\sim}40$ years are 74/1777, the group of $41{\sim}50$ years are 59/976(6.05%),the group of $51{\sim}60$ years are 29/240(12.08%) with age, the possessing rate of fatty liver was increased. 3. For sex, age, the possessing rate of fatty liver, in male $21{\sim}30$ years 8/329 cases(2.43%), $31{\sim}40$ years 64/118(5.72%) $41{\sim}50$ years 43/618(6.96%), $51{\sim}60$ years 22/134(16.42%) and in female, $21{\sim}30$ years 1/335(0.3%), $31{\sim}40$ years 10/659(1.52%) $41{\sim}50$ years 16/358(4.47%), $51{\sim}60$ years 7/106(6.6%) and then in total sex, with age, the incidence was increased. 4. 172 cases in fatty liver, we could find 109 cases of obesity(63.37%), in female the rate was more. 5. The abnormal was 13.95% for the level of Fasting blood sugar of fatty liver 172 cases, the average level of blood sugar was high markedly in female, on the contrary the number of abnormal blood sugar level was high in male. 6. In liver function test of 172 cases of fatty liver, the abnormal of sGOT value was 18.6%, sGOT value 20.93%, average of abnormal group in sGOT value was 52.62 units, sGPT value 56.99 units.

• Clinical and Experimental Pediatrics
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• v.54 no.12
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• pp.507-511
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• 2011

Purpose: The aim of the present study was to evaluate the characteristics of electrophysiologic studies (EPS) and radiofrequency ablation (RFA) performed in subjects aged less than 30 years with Wolff-Parkinson-White (WPW) syndrome, particularly pediatric patients under 18 years of age, based on our experience. Methods: Two hundred and one consecutive patients with WPW syndrome were recruited and divided to 3 groups according to age: group 1, 6 to 17 years; group 2, 18 to 29 years; and group 3, 30 to 60 years. The clinical, electrophysiological, and therapeutic data for these patients were evaluated by a retrospective medical record review. Results: A total of 73 (36%) of these patients were <30 years of age. Although there were more males than females in group 2 (male:female, 31:11), there was no sex difference in group 1 (male:female, 16:15). Left accessory pathway was detected less frequently in group 1 (32%, 10/31) than in group 2 (57%, 24/42) and group 3 (63%, 81/128) (P=0.023 and P=0.002, respectively). Conclusion: The present study describes several different electrophysiological characteristics in children and adolescents with WPW syndrome. Therefore, when EPS and RFA are performed in children and adolescence with WPW syndrome, we recommend that these characteristics be considered.

• Journal of Korean society of Dental Hygiene
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• v.10 no.5
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• pp.807-817
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• 2010

Objectives : The purpose of this study was to analyzes the job implementation of dental hygienist at dental hospital(university), dental clinic and general hospital in the city of Gwangju. Methods : The subjects in this study were dental hygienists who worked at dental hospital(university), dental clinic and general hospital in the city of Gwangju. A survey was conducted by post from June 10 to August 10. Out of the collected data, 204 answer sheets were analyzed. Results : 1. 'Medical & Dental history taking', 'Extra & Intra oral examination' and 'Dental hygiene care plane' in dental clinic were significantly higher than dental hospital(university) and general hospital(p<0.001). 'Remove of extrinsic stain' and 'Treatment of hypersensitivity tooth' in dental clinic and general hospital were significantly higher than dental hospital(university)(p<0.001). 'Preventive dental caries treatment' and 'Diet control' were shown the low frequency of job implementation. 2. Almost task elements of dental assistance duty shown that dental hygienists under the 24 years old were significantly higher dental hygienists over the 30 years old(p<0.05) and dental clinic and general hospital were significantly higher than dental hospital(university)(p<0.05) in frequency of job implementation. 3. 'Dental staff supervision', 'Patient management' and 'Dental chart arrangement' shown that dental hygienists over the 30 years old were significantly higher than dental hygienists under the 24 years old in frequency of job implementation(p<0.05). 'Infection control' of dental hygienists over 30 years old was significantly lower than dental hygienists under the 24 years old(p<0.001). Conclusions : The results of this study indicate that a scope of dental hygienists' job need to extend also in order to accomplish a job efficiently, is suggested that the effort is necessary to improve a quality of dental hygienist and to change of recognition of the dentist about dental hygienists' job.

• Journal of Medicine and Life Science
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• v.19 no.3
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• pp.103-108
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• 2022

In 2021,the incidence of newly notified tuberculosis in Jeju Province decreased by 23.0% compared to that in the previous year. This was the largest decline among the 18 municipalities studied. This study aimed to examine trends in the incidence of tuberculosis among different age and sex groups in Jeju Province between 2017 and 2021. This study observed the number of new cases in the annual report from 2017 to 2021, published by the Jeju Center for Infectious Diseases Control and Prevention. The average annual percentage change (AAPC; %) was calculated to determine the trend in crude incidence rates over the past 5 years by sex and age. While a P-value of <0.1 was considered marginally significant, aP-value of <0.05 was considered statistically significant. The AAPC of all age groups in Jeju Province had negative values. In men,there was a statistically significant decrease in ages 30-34, 40-44, 45-49, and 50-54 years and a marginally significant decrease in ages 35-59, 55-59, 60-64, 65-69, 75-79, and ≥80 years. In women, a statistically significant decrease was observed among patients aged 30-34, 35-39, and ≥80 years, and a marginally significant decrease was observed among patients aged 45-49, 50-54, 60-64, 65-69, and 75-79 years. A statistically significant decrease in tuberculosis was observed among patients in their 30s and 40s, and elderly patients aged ≥80 years comprised the group vulnerable to tuberculosis. Based on these findings, tuberculosis prevention and screening programs conducted in Jeju Province were effective.