• Journal of Creative Information Culture
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• v.7 no.4
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• pp.225-234
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• 2021

Training SW talent can have a positive impact on social development by increasing the competitiveness of our society in the era of The 4th Industrial Revolution. In order to train SW talent, this study analyzed 436 students in 1st, 2nd, and 3rd grade at B High School in S-si, Gyeonggi-do, how SW education is perceived by students, and how the timing of SW education affects students' SW-related career orientation. This study shows that the expansion of SW education in public education was necessary and groups which got an SW education since elementary school have higher career orientation related to SW than other groups. As a result, it could be inferred that getting SW education at an early stage had a positive impact on students' career orientation. Studies will be needed to analyze how SW education in the early stages works specifically on SW-related career orientation.

• Journal of The Korean Society of Integrative Medicine
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• v.10 no.1
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• pp.1-11
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• 2022

Purpose : Obesity is a major public health burden in developed countries and a well-known risk factor for cardiovascular disease. Short sleep duration is associated with obesity, as well as diabetes, heart disease and death. In modern society, habitual sleep restrictions seem unavoidable due to social obligations and work schedules along with a tendency toward decreased sleep time. Therefore, the purpose of this study is to examine the effect of differences in sleep time between weekdays and weekends on body mass index (BMI). Methods : This study involved 4,234 Korean adults aged 20 to 64 years based on data obtained from the 7th national health and nutrition examination survey (2016). All subjects were classified into the weekend catch-up sleep group (weekend CUS group). and the non catch-up sleep group (non-CUS group). Results : The longer the average sleep time, the lower was the BMI, and the larger the difference in sleep time between weekdays and weekends, the lower was the BMI. Compared with those with an average sleep time of 8 hours or more, obesity was 1.6-fold higher when the average sleep time was less than 6 hours, and 1.2-fold higher in the case of sleep time of 7 hours or more and less than 8 hours. When the difference in sleep time between weekdays and weekends was 0 or less, more than 0 hours but less than 1 hour, and more than 1 hour and less than 2 hours, the risk of obesity was 1.2-fold, 1.1-fold and 1.1-fold higher, respectively, compared with the risk associated with a sleep time difference of 2 hours or greater between weekdays and weekends. However, the difference was not statistically significant. Conclusion : Short sleep duration is positively associated with obesity. In addition, weekend catch-up sleep affects BMI.

• The Journal of Korean Society for School & Community Health Education
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• v.24 no.4
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• pp.51-60
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• 2023

Objectives: This study attempted to examine the factors that affect the national health checkup rate of the elderly, analyze the impact of these factors, and discuss countermeasures to problems that may arise based on this. Methods: This study used the '8th National Health and Nutrition Examination Survey (2019-2021)', a nationwide survey, as the main data. The subjects of the study are seniors aged 65 years or older, the dependent variable is whether or not they underwent a national health checkup, and the independent variables are gender, marital status, residence, education level, income level, economic activity, type of medical coverage, private insurance subscription, subjective health, High blood pressure, diabetes, depression, stress, and weight change were selected. The statistical analysis package for data analysis is SPSS ver. 27.0 was used, and a p value of less than 0.05 was considered significant. Results: Of the 2,806 seniors aged 65 years or older, 2,074 (73.9%) took the national health screening over the past two years. In terms of marital status, married was 1.451 times higher than single (p<0.001), and in terms of residence, myeon was 1.240 times higher than dong (p<0.01). In terms of education level, college graduates were 2.053 times higher than elementary school graduates (p<0.001), and in terms of economic activity, the employed were 1.325 times higher than the unemployed (p<0.01). Private insurance was 1.883 times higher than non-subscription (p<0.001), weight change was 1.234 times higher for change than no change (p<0.05), and current smoking rate was 2.003 times higher for non-smokers than for former smokers. It was high (p<0.001). Conclusion: In conclusion, if differentiated promotion and health education are strengthened for the elderly who cannot participate in the national health screening, the participation rate of the elderly in the national health screening is expected to increase.

• International Journal of Computer Science & Network Security
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• v.24 no.1
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• pp.226-234
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• 2024

The frequent handover problem and playing ping-pong effects in 5G (5th Generation) ultra-dense networking cannot be effectively resolved by the conventional handover decision methods, which rely on the handover thresholds and measurement reports. For instance, millimetre-wave LANs, broadband remote association techniques, and 5G/6G organizations are instances of group of people yet to come frameworks that request greater security, lower idleness, and dependable principles and correspondence limit. One of the critical parts of 5G and 6G innovation is believed to be successful blockage the board. With further developed help quality, it empowers administrator to run many systems administration recreations on a solitary association. To guarantee load adjusting, forestall network cut disappointment, and give substitute cuts in case of blockage or cut frustration, a modern pursuing choices framework to deal with showing up network information is require. Our goal is to balance the strain on BSs while optimizing the value of the information that is transferred from satellites to BSs. Nevertheless, due to their irregular flight characteristic, some satellites frequently cannot establish a connection with Base Stations (BSs), which further complicates the joint satellite-BS connection and channel allocation. SF redistribution techniques based on Deep Reinforcement Learning (DRL) have been devised, taking into account the randomness of the data received by the terminal. In order to predict the best capacity improvements in the wireless instruments of 5G and 6G IoT networks, a hybrid algorithm for deep learning is being used in this study. To control the level of congestion within a 5G/6G network, the suggested approach is put into effect to a training set. With 0.933 accuracy and 0.067 miss rate, the suggested method produced encouraging results.

• Journal of The Korean Society of Grassland and Forage Science
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• v.19 no.1
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• pp.57-62
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• 1999

A field experiment was carried out to compare the growth characteristics, forage yield and nutritive value of four $sorghum{\times}sudangrass$ hybrids (Sorghum bicolor (L.) Moench) grown under application of animal manure in 1995. The application amount of animal manure were 40MT in cattle manure, 30MT/ha in swine and poultry manure. The four NLCF's recommended hybrids used in this study were Pioneer 988, TE-Haygrazer and NC+ 855 (heading type), and Jumbo(headless type). The plant height was ranged between average 219 and 234cm, regardless of animal manure type and cultivar. NC+ 855 was classified as early maturing cultivar(first heading date was 1st July), and then TE-Haygrazer(4th July), and 988 was latest maturing type(12th July) among the cultivars used. Jumbo was going on vegetative stage in this experiment. The dry matter(DM) yield of four $sorghum{\times}sudangrass$ hybrids were ranged between 11.27 and 13.92MT in cattle manure, 11.46 and 12.77MT in swine manure, and 9.70 and 13.52MT/ha in poultry manure. No significant differences in forage yield were found among the cultivars used, but the DM yield of NC+ 855(13.40 MT/ha) was slightly higher than those of 988(11.31MT), Jumbo(11.26MT) and TE-Haygrazer(11.77MT). The nutritive value of $sorghum{\times}sudangrass$ hybrids was very similar among the cultivars. The crude protein yields were 1,526kg in 988, 1,429kg in Jumbo, 1,502kg in TE-Haygrazer, and 1,659kg in NC+ 855. However, there were no significant differences in protein yield. In conclusion, there were no differences of forage yield and nutritive value among four recommended $sorghum{\times}sudangrass$ hybrids, although maturity was different among heading-type hybrids.

• Economic and Environmental Geology
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• v.40 no.6
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• pp.727-738
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• 2007

The present study investigation the geochemical characteristics of the stream sediments in the Unbong area was conducted to enable a understanding the natural background and a prediction the prospects of geochemical disaster as a result of that bed rocks(mylonitic granites, Kim et al., 1992). We systematically collected seventy three stream sediments samples by wet sieving along the primary channels. Major, trace and rare earth element(REE) concentrations, combined with mineralogical characteristics, were determined by XRD, XRF, ICP-AES and NAA analysis methods. Major element concentrations for the stream sediments in the Unbong area were $SiO_2\;36.94{\sim}65.39wt.%,\;Al_2O_3\;10.15{\sim}21.77wt.%,\;Fe_2O_3\;3.17{\sim}10.90wt.%,\;CaO\;0.55{\sim}5.27wt.%,\;MgO\;0.52{\sim}4.94wt.%,\;K_2O\;1.38{\sim}4.54wt.%,\;Na_2O\;0.49{\sim}3.36wt.%,\;TiO_2\;0.39{\sim}1.27wt.%,\;MnO\;0.04{\sim}0.22wt.%,\;P_2O_5\;0.08{\sim}0.54wt.%$. Trace and REE concentrations for the stream sediments were $Cu\;4.8{\sim}134ppm,\;Pb\;24.2{\sim}82.5ppm,\;Sr\;95.9{\sim}739ppm,\;V\;19.9{\sim}124ppm,\;Zr\;52.9{\sim}145ppm,\;Li\;25.2{\sim}3.3ppm,\;Co\;3.87{\sim}50.0ppm,\;Cr\;17.4{\sim}234ppm,\;Hf\;3.93{\sim}25.2ppm,\;Sc\;4.60{\sim}20.6ppm,\;Th\;3.82{\sim}36.9ppm,\;Ce\;45.7{\sim}243ppm,\;Eu\;0.89{\sim}2.69ppm,\;Yb\;1.42{\sim}5.18ppm$. According to the comparison of average major element concentrations, CaO, $Na_2O\;and\;K_2O$ contents are higher in stream sediments than in bed rocks(mylonitic granites, Kim et al., 1992) $Al_2O_3\;and\;SiO_2$ contents show good correlation both stream sediments and bed rocks(mylonitic granites, Kim et al., 1992). Yb and Eu in the stream sediments show a positive correlation with $SiO_2$. In contrast, the stream sediments display a negative correlation.

• Journal of Aquaculture
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• v.10 no.4
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• pp.449-456
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• 1997

This study was concuted to determine the optimal conditions for raising the freshwater rotifer, Brachinus calyciflorus. The authors presented some biological informatin obtained from incubation experiment under the various controlled temperatures. Lorica size of the rotifer was divided into two groups : the length and the width for the S-type was $141.0\pm16.7\mu m$($110.1-182.5\;\mu m, n=44$)and $107.0\pm20.3\mu m\;(75.3-152.3\mu m, n=44)$, and those for the L-type was $262.8\pm15.2\mu m\;(234.4-288.6\mu m,\;n=20)\;and\;182.6\pm13.4\mu m (159.8-207.0\mu m,\;n=20$), respectively. The number of eggs being attached on the female varied from 1 to 11 at various culture conditions. Egg type was divided into two groups, large and small. Large and small egg was measured in its major axis as 85a.7-107.8$\mu$m and 55.1-65.2$\mu$m for S-type, and 104.9-121.8 $\mu$m and 62.8-89.1$\mu$m for L-type respectively. The maximum density was reached at 4th day after incubation. The density was 583.9 rotifers/$m\ell$ for $25^{\circ}C$-experimental. group and 421.3 rotifers/$m\ell$ for $22^{\circ}C$-experimental. group respectively. In the case of $28^{\circ}C$-experimental. group, it suddenly decreased into 4.7 rotifers/$m\ell$ at 1st day after incubations and did not recover to its initial density. The maximum rate of increase of populatin per day was reached 0.802 for $22^{\circ}C$-experimental. group at day 2 and fluctuated thereafter. For $25^{\circ}C$-experimental. group it increased to 0.964 at day 3 of incubation and then declined. And the egg ratio of female was reached the maximum of 0.614 for 22$^{\circ}C$- at 3rd day and 0.772 for $25^{\circ}C$-experimental. group at 4th day of incubation.

• Parasites, Hosts and Diseases
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• v.21 no.2
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• pp.234-240
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• 1983

The pathogenicity of free-living amoeba, Waegleria fcwleri, is influenced according to the strain, cultural condition and host (Culbertson et at., 1968; Carter, 1970; Wong et at., 1975), Phillips (1973) demonstrated that Entamoeba histolytica became avirulent after more than 2 year maintenance in axonic culture in vitro. This study was carried out to compare the difference in pathogenicity between two strains of N. fowleri, one of a prolonged maintenance in arsenic medium and the other one obtained by serial brain passage in mice. The 0 strain was that N. fowleri had cultivated axenically more than 7 years in CGVS medium. The 2-1 strain was obtained from the brain of mouse inoculated intranasally with a strain, which was from the mouse brain infected with 0 strain, and cultured for 15 weeks until the beginning of this experiment. White male mice weighing 18-22 g were used. Mice were anesthetized by an intraperitoneal injection of about 1 mg secobarbital, and inoculated intranasally with $10{\times}$10^4 live N. fowleri trophoBoites in a $5{\;}{\mu}l$ cell suspension. Sluggish behaviour, nervousness, rotation and leg paralysis were developed earlier and more frequently in the 2-1 experimental group than the control 0 group. Pathological changes such as inflammatory and necrotic lesion were observed in the olfactory and anterior portion of brain, and these changes were more extensive in the 2-1 group. The edematous and inflammatory changes in lung were demonstrated in mice died after 13th day post-inoculation. The experimental mice of 2-1 group began to die suddenly from 7th day post-inoculation, and the survival time in 2-1 group mice was shorter than 0 group mice. The typical primary amoebic meningoencephalitis was developed in the mice inoculated intranasally with N. fowleri. The prolonged maintenance of N. fowleri amoebae in axonic CGVS medium was observed to have lost their original pathogenicity for mice, but their pathogenicity was restored by serial brain passage in mice.

• Journal of the Korean Applied Science and Technology
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• v.35 no.1
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• pp.223-234
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• 2018

The purpose of this study was to analyze the parent-related factors affecting obesity and overweight in school-aged children. The subjects of this study were 408 students of 4th~6th grade and their parents and examined the degree of obesity, obesity-related characteristics, eating habits and exercise habits of children and their parents. The data were analyzed using $x^2-test$, t-test, ANOVA and multiple logistic regression analysis. The results of this study were as follows: father's BMI OR=1.265(95% CI: 1.133-1.412, p<.001), mother's BMI OR=1.214(95% CI: 1.077-1.368, CI: 1.113-1.725, p= .001), the child's eating habit OR=0.953(95% CI: .909- .998, p= .042), the TV watching time OR=1.385(95% CI: 1.113-1.725, p= .004), the economic state OR=0.132(95% CI: .026- .676, p= .015) were factors related affecting obesity and overweight in school-aged children. Children's obesity was influenced by parent's genetic factors, eating habits and living environment factors. Therefore, it is important to motivate the children as well as the their parents and induce the active participation of the program in order to manage the child's obesity.

• Culinary science and hospitality research
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• v.22 no.2
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• pp.234-251
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• 2016

The purpose of this study is to verify the effects of service quality and usage review of smartphone Maiib application(apps) on satisfaction, and reuse intention, convenience sampling method was employed and survey was conducted during the 15th of September, 2015 to the 30th on October as perceived by smartphone Maiib app users. Total of 312 responses were collected, and 295 usable data were used for statistical analysis excluding missing data. Descriptive analysis, factor analysis, and SEM were used to verify the hypothesis. The results from this study are as follows: first, reliability, empathy, usefulness of service quality significantly impact on Majib app satisfaction except informativeness and mobility; second, review assentation of the usage review characteristics significantly impact on Majib app satisfaction but review usefulness of the usage review characteristics significantly did not influence on Majib app satisfaction; third, smartphone Majib app satisfaction critically influences on reuse intention. Based on these results, current study can contribute to verify useful information is very important antecedent to construct the effective marketing strategy by smartphone app.