• Clinical and Experimental Pediatrics
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• v.65 no.1
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• pp.10-20
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• 2022

The prevalence of developmental disabilities is increasing worldwide over time. Developmental issues in infancy or early childhood may cause learning difficulties or behavioral problem in school age, further adversely affecting adolescent quality of life, which finally lead to low socioeconomic status in family, increase in medical expenses, and other relevant issues in various ways. Early childhood has brain plasticity, which means there is a high chance of recovering from developmental issues by early detection and timely intervention. Pediatricians are placed an ideal position to meet with young children till 6 years of age, of which age range is the time applicable to early intervention. Determining child's developmental status can be made by 2 pathways such as developmental surveillance and developmental screening tests. For better results, pediatricians should update their knowledge about developmental issues, risk factors, and screening techniques through varying educational program or other relevant educating materials. This paper will update reports on the prevalence of developmental disabilities and review the recent results of the Korean developmental screening test and discuss relevant issues. Finally, it will be addressed the pediatrician's role in early detecting developmental issues and timely intervention.

• Korean Journal of Animal Reproduction
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• v.21 no.2
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• pp.103-109
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• 1997

The studies on the carried out to investigate to determine the optimum thawing temperature and equilibration time and 1 step straw method of frozen bovine embryos. The follicular oocytes were cultured in TCM-199 medium containing 10 IU/ml PMSG(Sigma, USA), 10 IU/ml hCG(Sigma, USA), 1 $\mu\textrm{g}$/ml $\beta$-estradiol(Sigma, USA) and 10% FCS for 24~48 hrs in incubator with 5% CO2 in air at 38.5$^{\circ}C$ and then matured oocytes were again cultured for 12~18 hrs with motile capacitated sperm by preincubation of heparin. The bovine embryos following dehydration by cryoprotective agents and various concentration of sucrose were directly plunged into liquid nitrogen and thawed in 3$0^{\circ}C$ water. Survival and in vitro developmental rate was defined as developmental rate on in vitro culture or FDA-test. The results are summarized as followes : 1. The equilibration time on in vitro developmental rates of bovine embryos was attained after short period of time(2.5~5 min.) in the freezing medium higher than long period of time (10~20 min.). 2. The temperature thawed at 3$0^{\circ}C$ after rapid freezing of bovine embryos resulted in a significantly higher in vitro developmental rate than did at 2$0^{\circ}C$ and 35$^{\circ}C$. 3. The thawing time on in vitro developmental rates of bovine embryos was attained after short period of time(1~5 min.) in the freezing mediuim higher than long period of time(10min.). 4. The in vitro developmental rates of bovine embryos after rapid frozen-thawing by 1 step straw method in the freezing medium added 1.5M, 2.0M glycerol, DMSO, propanediol and 0.25M, 0.50M, 0.75M, 1.00M sucrose were 12.5~19.4%, 10.0~15.6%, 9.1~13.8% and 6.7~12.9%, respectively.

• Journal of Family Resource Management and Policy Review
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• v.17 no.2
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• pp.75-91
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• 2013

This study is focused on the amount of time spent on child care by mothers with preschool children with developmental disabilities. It is designed to find out how much time mothers spend taking care of their children and to identify related factors. The subjects of this study are 162 mothers of children with developmental disabilities residing in Seoul. The findings are as follows: First, mothers with preschool children with developmental disabilities spent 6 hours and 50 minutes per day caring for their children during weekdays and 6 hours and 10 minutes on weekend days. This is double the amount of time spent by the average mother with preschool children. Second, mothers spent much more time caring for their disabled children than they do for their children without disabilities. Third, determinants of a mother's time for caring their disabled child during weekdays were mother's employment, the number of children, and gender of the disabled child. On weekend days, determinants of mother's care time were the number of children and husband's help for childrearing.

• Journal of Korea Multimedia Society
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• v.24 no.2
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• pp.328-335
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• 2021

In the era of 'Untact', virtual reality-based job training platforms are actively being used as part of non-face-to-face education for students with developmental disabilities. Because the people with developmental disabilities may lack sufficient cognitive abilities, it is difficult to conduct untact training seamlessly without the help of a third party. Therefore, it is necessary for training programs to identify the right timing to provide help so that the training can be continued. This research analyzed the visual attention of students with developmental disabilities in virtual reality-based job training program in order to determine the point of time when an intervention is required by the trainee. Results showed that students who completed the mission tended to have intense visual attention on a small number of objects for a certain period of time; the visual attention of the students who failed tended to shift erratically among multiple objects.

• Child Health Nursing Research
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• v.26 no.2
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• pp.131-139
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• 2020

Purpose: This study was conducted to identify factors related to developmental care performance among neonatal intensive care units (NICU) nurses. Methods: The participants were 139 nurses who had provided care to premature infants for more than 6 months and were recruited from the NICU of 8 hospitals. Data were collected from September 1 to December 1, 2017 through questionnaires that encompassed developmental care performance, developmental care perceptions, and the nursing work environment. Results: More than half (51.8%) of the participants responded that they had never received developmental care education, and for 89.6% of those who had received developmental care education, it was a one-time event. The average developmental care performance of NICU nurses was 0.81, with a range of 0.5~1 point. Multiple regression analysis, demonstrated that the nursing work environment (β=.27, p=.001) and developmental care perceptions (β=.23, p=.004) influenced developmental care performance, with a total explanatory power of 14%. Conclusion: Based on these results, developmental care education for the NICU nurses must be provided systematically. In addition, strategies to improve nurses' perceptions of developmental care and to provide appropriate support for the nursing work environment can promote developmental care performance.

• Physical Therapy Korea
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• v.6 no.1
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• pp.47-61
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• 1999

The purpose of this study was to investigate factors influencing on the early treatment of children with developmental disability. Data was collected from 102 mothers of children with developmental disability who were treated at 4 rehabilitation facilities in Kyunggi-Do and Kangwon-Do. The results were as follows: 1) Of a total of 102, 63 children began to receive rehabilitation therapy during the period 0~12 months (early treatment group), 38 children after 1 year of age (delayed early treatment group). 2) There were statistically significant differences between the early treatment group and delayed early treatment group for prematurity, low birth weight, the time to discover developmental abnormalities, the time of first diagnosis, and first treatment (p<0.05). 3) There were no statistically significant differences in the two groups for level of education, economic status, risk factors (except prematurity and birth weight), home care, family's cooperation and commuting time (p>0.05). Based on this study, the important factors for early treatment were early detection, early diagnosis and constant follow-up for high-risk babies.

• Journal of the Korean Home Economics Association
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• v.48 no.10
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• pp.89-103
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• 2010

The purpose of this study was to examine the developmental trajectories of adolescents' internalizing problem behaviors. The data came from 3,188 middle school students through their participation in the Korea Youth Panel Survey(KYPS). Adolescents with a high level of internalizing problem behaviors in the first year showed a rapid decline in these behaviors over time, whereas for adolescents with a low level of these behaviors in the first year the decline was slow. The predictors of the developmental trajectories were related to individual variables, such as gender, self-esteem, self-control, stress, self-stigmatization, and academic achievement. The developmental trajectories of adolescents' internalizing problem behaviors were classified into four groups. The predictors of the patterns of developmental trajectories in adolescents' internalizing problem behaviors appeared to be related to individual variables.

• Journal of Family Resource Management and Policy Review
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• v.18 no.2
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• pp.103-119
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• 2014

This study focuses on the relationship between time management behavior and parenting stress of mothers with developmentally disabled children. The participants of this study were 162 mothers whose children have developmental disabilities and attend pre-school and social welfare centers for early education. This study investigates the time management behaviors of the participants, and whether these behaviors have an effect on their time management satisfaction and parenting stress. The findings were as follows: 1) The time management behaviors of the participants were lower than average, scoring 2.87 out of 5. The order of dimensional scores from highest to lowest were sequencing, planning, recording habits, evaluating, and setting goals. 2) Time management satisfaction and parenting stress for the participants exhibited a negative correlation. 3) Adaptation behaviors of the children and time management behaviors of the mothers were factors that had significant effects on the mothers' parenting stress. These results showed the importance of time management for mothers with developmentally disabled children.

• Reproductive and Developmental Biology
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• v.28 no.1
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• pp.53-57
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• 2004

The study was carried out to investigate the effects of morphology, reproductive cycle, incubation time and activation of oocytes on in vitro maturation of cat oocytes and development of IVM/IVF embryos. The results were summarized as follows: 1. When recovered from ovaries collected at different stages of the reproductive cycle (inactive, follicular and luteal stage), the developmental rates of oocytes to GV and MI stage were 72.5% and 27.5%, 57.5% and 7.5%, 62.5% and 17.5%, respectively. 2. The developmental rates of oocytes with cumulus cells to GV and MI stage in different conditions of incubation (5% $CO_2$ , 95% $O_2$ and 10% $CO_2$, 90% $O_2$) were 70.0% and 27.5%, 52.5% and 20.0%, 55.0% and 12.5%, respectively. 3. The developmental rates to GV and MI oocytes when cultured at different time of incubation (17∼20, 21∼24, 25∼28 and 29∼32 h) were 67.5% and 20.0%, 67.5% and 30.0%, 62.5% and 22.5%, 65.0% and 15.0%, respectively. 4. The fertilization and cleavage rates of freshly collected oocytes with and without cumulus cells were 72.5% and 25.0%, 37.5% and 7.5%, respectively. The rates were greater in oocytes with cumulus cells than those without cumulus cells. 5. The fertilization and cleavage rates of oocytes recovered from ovaries collected at different stages of the reproductive cycle (inactive, follicular and luteal stage) were 75.0% and 25.0%, 40.0% and 7.5%, 50.0% and 15.0%, respectively.

• The Korean Journal of Zoology
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• v.30 no.2
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• pp.99-106
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• 1987

It is the purpose to investigate the physiological toxity and mutagenicity by heavy metal compounds such as potasium dichromate, sodium arsenite and selenium dioxide on the development of Drosophila melanogaster. These chemical compounds were highly toxic at every developmental stage of Drosophila. The relative values of fecundity, viability and developmental time obtained on food media containing 5 different levels of potasium dichromate (500, 600, 700, 800, and 900 ppm), also 5 different levels of sodium arsenite and selenium dioxide (10, 15, 20, 25 and 30 ppm). Resulting in the relative values of fecundity and viability generally decreased, on the contrary developmental time generally reduced as the concentration of chemicals in the food increased. A significant reduction in the fecundity was observed between 800 and 900 ppm (p<0. 01) on the potasium dichromate media, between 15 and 20 ppm (p<0. 05) on the sodium arsenite media, between 20 and 25 ppm (p<0. 02) on the selenium dioxide media. A significant reduction in the viability was observed between 700 and 800 ppm (p<0. 01) on the potasium dioxide media, between 25 and 30 ppm (p<0. 01) on the sodium arsenite media, between 20 and 25 ppm (p<0. 01) on the selenium dioxide media. The developmental time was significantly reduced between 800 and 900 ppm (p<0. 001) on the potasium dioxide media, between 15 and 20 ppm (p<0. 001) on the sodium arsenite media, and between 25 and 30 ppm (p<0. 01) on the selenium dioxide media.