• Nuclear Engineering and Technology
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• v.54 no.9
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• pp.3452-3458
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• 2022

Our study adopted a big data analysis approach to determine whether there was a significant relationship between environmental radiation dose rates or age and cancer incidence rates in the Republic of Korea. The data for this analysis included environmental radiation dose rates, number of cancer patients, and age distributions of the residents from 2009 to 2016 in the administrative districts where environmental radiation monitoring posts were located. For this analysis, the environmental radiation dose rates were obtained from 171 monitoring posts located in 113 elementary administrative districts in the Republic of Korea. The number of cancer patients and the age distributions were obtained from the Central Cancer Information Center of the National Cancer Center of Korea and the Ministry of the Interior and Safety, respectively. Our findings indicated that there was no statistically significant relationship between the environmental radiation dose rate and the cancer incidence rate. However, age had a considerable influence on the cancer incidence rate of the monitored regions.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.17 no.3
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• pp.155-161
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• 2014

Purpose: Constipation is a common pediatric problem worldwide. This study aims to describe the clinical characteristics of pediatric constipation in south Jordan according to gender and age group. Methods: All patients with constipation managed at our pediatric gastroenterology service between September 2009 and December 2012 were included. Hospital charts were reviewed. Demographic data, clinical characteristics, and final diagnosis were recorded. Data were analyzed according to gender and the following age groups: infants, pre-school, school age, and adolescents. Results: During the study period, 126 patients were enrolled. The number (percentage) of patients according to age were the following infants: 43 (34.1%), pre-school: 55 (43.7%), school age: 25 (19.8%), and adolescents: 3 (2.4%). Males made up 54.8% of the study population. There were no statistical gender differences in any age group. The most common symptom in all age groups was dry, hard stool. Infrequent defecation was found in almost one-half of the patients. Fecal incontinence was more common in school-aged children compared to pre-school-aged children and adolescents. Abdominal pain was seen in almost 40% of the constipated children. Abdominal pain was more prevalent in girls and older children. Fecal mass in the rectum was the most common physical finding, with constipated boys exhibiting higher rates. Functional constipation was the most common etiology. Conclusion: Clinical characteristics of constipation in children vary according to age group and gender. Older children had less frequent bowel motions, a longer duration of symptoms, and a higher prevalence of long-standing constipation compilations (fecal incontinence and abdominal pain).

• Clinical Nutrition Research
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• v.13 no.2
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• pp.96-107
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• 2024

Malnutrition affect clinical outcomes in hospitalized old age patients, but the data on the related outcomes on the basis of different age categories are still limited. We aimed to investigate the interplay of associations among body mass index (BMI), falls risk, and mortality rate in different older adult patient age categories. This retrospective study included hospitalized patients aged ≥ 65 years who received artificial nutrition. Demographic, biochemical, and survival data were collected. BMI was evaluated using the World Health Organization BMI cutoffs for Asians, and patients were classified into high (≥ 23.0 kg/m²), normal (18.5-22.9 kg/m²), and low (< 18.5 kg/m²) BMI groups. The Morse Fall Scale was used to assess falls risk. By age categories, all patients (n = 4,642) were divided into the 65-74 (n = 2,649) and ≥ 75 (n = 1,993) years age groups. We found that the proportion of low-BMI and high risk of falls increased with age. Further, low-BMI was associated with increased falls risk in both age groups. Overall survival rate tended to be lower in the low-BMI and ≥ 75 years group than that in other patient groups, but did not differ significantly compared with the low-BMI and 65-74 years group. Low-BMI was associated with increased falls risk and mortality; however, the association depended on specific patient age groups.

• Korean Journal of Child Studies
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• v.17 no.1
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• pp.153-171
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• 1996

The purpose of this study was to examine children's social-cognitive modes of play in same-age and mixed-age kindergarten classrooms. The subjects were 45 children. in three classrooms of 4-year-olds, 69 children in three classrooms of 5-year-olds, and 60 children in three mixed-age classrooms of 4- and 5-year-olds. Observations were conducted by videotape recordings. Observation periods were of five-minutes duration. There were ten observations of each child's indoor free-play periods. Observational data were collected by the time sampling method with the social cognitive play behavioral checking list based on an adaptation of one devised by Rubin(1985). The data was analyzed by t-test with the SAS computer program. Four- and five-year-olds in mixed-age classrooms were more likely to engage in "complex" modes of play than 4- and 5-year-olds in same-age classrooms. Four-year-olds in same-age classrooms were more likely to engage in solitary-functional, parallel-functional, and group-functional play than 4-year-olds in mixed-age classrooms. However, 4-year-olds in mixed-age classrooms were more likely to engage in group-constructive, group-dramatic, solitary-game, and group-game play than 4-year-olds in same-age classrooms. Five-year-olds in same-age classes were more likely to engage in solitary-functional and parallel-functional play than 5-year-olds in mixed-age classes. Five-year-olds in mixed-age classes were more likely to engage in group-constructive, group-dramatic, and group-game play than their counterparts in same-age settings.

• Korean Journal of Human Ecology
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• v.6 no.2
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• pp.1-14
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• 1997

The purpose of this study was to find out middle age women's needs of the educare services. Furthermore this study was done to serve as the basic data for guidance and the preparation of effective educare services. For these purposes, the data were collected by using questionnare from to 305 middle age women living in T city. The data were analyzed by frequency, percentile, chi square analysis. The major findings of this research are as follows: 1. Most subjects of present study needs for the daycare center. Furthermore there were significant differences in the daycare management, caring agent, day care cost according to the school career. 2. They wantd nere home daycare center and part time daycare center. And there were no significant differences in general enviroment of daycare center according to the school career. 3. There were significant differences in 1)the standards of selection for teacher 2)teacher's educational level, 3)teacher's age according to the school level. And they wanted 'low school career but caring experiences' daycare teacher.

• The Journal of the Convergence on Culture Technology
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• v.8 no.6
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• pp.155-159
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• 2022

After artificial intelligence was trained with the data on the concentration of essential mineral elements in hair, the age was predicted by the concentration of mineral elements in the hair of the subject, and the result was compared with the actual age of the subject, and the correlation was investigated. The total number of hair data was 296, of which 2/3 were used for AI learning and 1/3 was used as the subject data. There was a correlation of 0. 678 between the actual age of the young subjects under the age of 25 and the age predicted by the AI. There was almost no correlation in the middle-aged subjects group, and there was a weak correlation of 0.522 in the elderly subject group. In order to secure the usefulness of artificial intelligence using hair mineral element concentration data, it is necessary to provide a larger number of data to the artificial intelligence.

• The Korean Journal of Health Service Management
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• v.10 no.2
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• pp.99-110
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• 2016

Objectives : The aim of the present study was to propose more substantial data for evaluating the quality of life of adults in terms of oral health as well as provide the basic data necessary to develop an effective oral health care program that improves the quality of life of adults by age group. Methods : Raw data were used from the sixth Korea National Health and Nutrition Examination Survey for the first and second years which was conducted from January 2013 to December 2014. Multiple regression analysis was conducted with the collected data by gender and age group to determine the impact of oral functions on the quality of life of adults. Results : It turned out that oral function has an impact on the quality of life of adults by age group as follows: young people (${\beta}$=.077), middle-age people (${\beta}$=.101), young-old elderly people (${\beta}$=.140), and old-old elderly people (${\beta}$=.143). It was shown that as people grow older, they have better quality of life only when they have good oral function. Conclusions : It is necessary to develop a proper oral health care program that prevents oral diseases and improves oral function by age group, which eventually will lead to good oral health. Continuous oral healthcare is also considered necessary.

• Korean Journal of Health Education and Promotion
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• v.11 no.1
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• pp.70-84
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• 1994

On the basis of the study intended to research by cross-sectional study keeped pace with semi-longitudinal study the growth accelerating phenomena that MGA(Maximum Growth Age) in teenager's body height. The duration of study is from Oct. 1st. 1991 to September 30 1992 and the data are analysed through computer. The body height and MGA of Koreans who had been for during the period from 1898 to 1973 proved transition of the growth accelerating phenomena by research data reported between 1913 and 1990. The results are as follows: 1. Maximum Growth Age The MGA's in body height of male are respectively the age 15.024 in 1913, 14.28 in 1940, 13.65 in 1959, 13.86 in 1967, 12.52 in 1983, 11.39 in 1987, 12.36 in 1990, while those of female are the age of 12.0 in 1940, 12.36 in 1959, 10.45 in 1969, 11.15 in 1985, 10.27 in 1988, 10.23 in 1990 ; these data show that the MGA of the Korean has been getting younger. 2. The correlation of the MGA's in body height are as below ; Male ; r = -0.448(p<0.01) Female ; r = -0.404(p<0.05) 3. The equation of linear regression of MGA's in body height are as below ; Male ; Y(MGA) = -0.0316X(the year)+75.297 Female ; Y(MGA) = -0.035X(the year)+79.986 4. The MGA's in body height are shown in Table 3. 5. From the transition of the growth accelerating phenomena, we can compute the fact that the MGA's has been getting younger by 0.3 year per 10 years. 6. The future growth accelerating phenomena in body height, the MGA's of male are respectively the age 12.25 in 1995, 12.09 in 2000, 11.94 in 2005, 11.78 in 2010, while those of female are the age of 10.16 in 1995, 9.98 in 2000, 9.81 in 2005, 9.64 in 2010, these data show that the MGA of female are more younger than that of male.

• Proceedings of the KSRS Conference
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• 2007.10a
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• pp.449-451
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• 2007

In the commercially managed timber lands, the information such as height, age, stand density, canopy closure and leaf area index need to be collected periodically. Stand volume is the most fundamental information in the valuation of timber, however, stand age information is the primary element of forest inventory and these two are highly correlated. Conventional method of collecting stand age information by field surveys such as ring count method is accurate; however, it is expensive, labor-intensive and time consuming. In the present study it was aimed to collect stand age information using modem techniques in a commercially managed timberland situated in Tennessee, USA. The Landsat Thematic Mapper (TM), Enhanced Thematic Mapper (ETM+) of three different periods, Shuttle Radar Topography Mission (SRTM), National elevation dataset (NED) and field inventory data were used. Normalized difference vegetation index (NDVI) and Tasselled Cap (TC) transformation techniques were applied on the TM and ETM+ data. The regression analysis was carried out to identify the correlation between stand age and NDVI, TC. In the present study about 2,469 datasets were analyzed. The $R^{2}$ value for stand age estimation was 0.713. The NDVI, TC2 and TC3 were found to produce accurate timber age information.

• Proceedings of the Korea Concrete Institute Conference
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• 2002.10a
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• pp.809-814
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• 2002

Recently, the properties of early-age concrete are increasingly important because these properties directly influence the behavior of early-age concrete structures including stress and cracking behavior. Nevertheless, the studies on early-age concrete are limited to strength and temperature development. The purpose of present study is to propose a simple and rational method which can predict the stress and strain behavior of young age concrete. A series of test have been done to measure the temperature development, strains and stresses in concrete members. The concept of equivalent age was used to define the degree of hydration and this degree of hydration was used to calculate the strength and elastic modulus. The critical degree of hydration and thermal expansion coefficient were calculated using experimental data. It is seen that the critical degree of hydration range from 0.05 to 0.11 based on the measuring method. The thermal expansion coefficient was calculated based on the measured non-mechanical strain and it is found that the coefficient decreases slightly with the increase of age. The consideration of critical degree of hydration in calculating stresses gives more accurate results. The present study provides useful method and data in evaluating early-age behavior of concrete structure.