• Korean System Dynamics Review
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• v.6 no.2
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• pp.73-93
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• 2005

This paper on an experiment, using System Dynamics, on the affect of increase in number of beds and medical instruments used for the care of premature infants, which constitute the physical requirements in quality of medical services, on changes in the survival rate of premature in ants that leads to demographic changes of Newborn infants. The model has four sectors: take-in capacity, survival rate of premature infants, demographics without newborn infants and demographics with newborn infants. The model simulates the changes in demographics of the newborn infants from 2002 to 2022. The study results show that the survival rate of premature infants can be increased by improving the physical aspects in the quality of medical services. An average of 1,900 premature infants can survive as a result of the physical quality improvements in medical services, adding up to an increase of 37,300 newborn infants by the year 2022.

• Journal of Korean Academy of Nursing
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• v.47 no.2
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• pp.277-288
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• 2017

Purpose: This study was performed to identify the experience of becoming a father of a high risk premature infant. Methods: Grounded theory was used for this research. The participants were 12 fathers who had premature infants lighter than 2,500g of birth weight, less than 37 weeks of gestational age and having stayed 2 weeks or longer in a NICU right after birth. Theoretical sampling was done to identify participants and indepth interviews were done for the data collection. For data analysis, the process suggested by Corbin and Strauss was used. Results: For these participants the core phenomenon of the experience of becoming a father of a high risk premature infant was 'striving through with belief and patience'. The phenomenon was 'being frustrated in an unrealistic shock'. Contextual conditions were 'uncertainty in the health status of the premature baby' and 'no one to ask for help' and intervening conditions were 'possibility in the health recovery of the premature baby' and 'assistance from significant others'. Action/interaction strategies were 'withstanding with belief in the baby' and 'enduring with willpower as head of the family' and the consequence was 'becoming a guardian of the family'. Conclusion: For the participants, the process of becoming the father of a high risk premature infant was striving through the situation with belief in their babies' ability to overcome the crisis and waiting for the babies' recovery with patience.

• Journal of Korean Academy of Nursing
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• v.42 no.7
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• pp.936-946
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• 2012

Purpose: This study was done to develop a video discharge education program focusing on mother-infant interaction to facilitate the development of maternal role confidence for mothers of premature infants. Methods: The process of the program was based on the Network-based Instructional System Design suggested by Jung (1999). For the content of the program, needs and concerns of mothers of premature infants found on web sites and existing literature were analyzed. Based on this content, the scenario and the video were developed. Nurses and mothers of premature infants participated in the process of testing the content validity, scenario development, and evaluation of final video production. The final video has two parts and lasts 21 minutes. The first part focuses on mother-premature infant interaction and the second part focuses on health management of infants. Results: Eleven mothers of premature infants participated in the evaluation of the appropriateness of the video as a teaching method and for educational content. They reported that the content on mother-infant interaction, maternal sensitivity, and maternal role confidence was especially beneficial. Conclusion: The findings indicate that video program is effective for education on maternal-premature infant interaction and the use of video in practical settings is strongly recommended.

• Child Health Nursing Research
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• v.15 no.3
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• pp.261-270
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• 2009

Purpose: The purpose of this study was to compare the result of one-way ANOVA with that of cross-correlation time series analysis in order to evaluate physiologic responses of premature infants to human voices. Methods: Four premature infants born prior to 32 weeks gestational age were included in the study. The Gould 4000TA Recording System recorded the preterm infant's heart and respiratory rate while they were listening to a pre-recorded voice recording. Each infant listened to both male and female voices (1 min each) at each testing session. Results: The results of both one-wayANOVA and cross-correlation time series analysis using heart and respiratory rate data were not consistent in some of premature infants. A cross-correlation time series analysis revealed that the responses of premature infant to vocal stimulation occurred at a varying number of seconds after the stimulus was presented and lasted for over 20-30 sec. Conclusion: The results indicate that a time series analysis can provide more detailed information on the rapidly changing physiologic status of premature infant to the auditory stimulus. In addition, the results provide an insight into an auditory responsitivity of premature infants to a naturally occurring sound, the human voice, in the neonatal intensive care unit.

• Journal of IKEEE
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• v.25 no.1
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• pp.212-217
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• 2021

Premature contraction arrhythmia is the most common disease among arrhythmia and it may cause serious situations such as ventricular fibrillation and ventricular tachycardia. Most of arrhythmia clasification methods have been developed with the primary objective of the high detection performance without taking into account the computational complexity. Also, personalized difference of ECG signal exist, performance degradation occurs because of carrying out diagnosis by general classification rule. Therefore it is necessary to design efficient method that classifies arrhythmia by analyzing the persons's physical condition and decreases computational cost by accurately detecting minimal feature point based on only QRS features. We propose method for personalized specific classification of premature contraction arrhythmia based on QRS features in smart healthcare environments. For this purpose, we detected R wave through the preprocessing method and SOM and selected abnormal signal sets.. Also, we developed algorithm to classify premature contraction arrhythmia using QRS pattern, RR interval, threshold for amplitude of R wave. The performance of R wave detection, Premature ventricular contraction classification is evaluated by using of MIT-BIH arrhythmia database that included over 30 PVC(Premature Ventricular Contraction) and PAC(Premature Atrial Contraction). The achieved scores indicate the average of 98.24% in R wave detection and the rate of 97.31% in Premature ventricular contraction classification.

• Journal of Preventive Medicine and Public Health
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• v.34 no.3
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• pp.191-199
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• 2001

Objective : In this study, we focused on estimating the burden of premature death in Korea caused by smoking using the YLL(years of life lost due to premature death) measurement. Methods : First, we determined parameters: such as age-specific standard life expectancy, age on death, sex, and cause of death by analyzing the national death certificate data and life table collected during 1997. These were provided by the National Statistical Office. Secondly, we estimated the age group- specific years of life lost due to premature death by employing the standard expected years of life lost(SEYLL) measurement. Thirdly, the burden of premature death caused by smoking was estimated using the YLLs measurement which was developed by the global burden of disease study group. Fourthly, We calculated the risk related to smoking using the population attributable risk. Results : The following results were obtained in this study: 1) Premature death that is attributable to smoking in males could be prevented in 60.9%(513,582 person-year) by non-smoking. 2) The burden of premature death by smoking for female was prevented to 17.7%(513,582 person-year) by non-smoking. Conclusion : We found that the YLL method employed in this study was appropriate in quantifying the burden of premature death. This provides a rational basis for planning a national health policy regarding premature deaths caused by smoking and other related risk factors.

• Advances in pediatric surgery
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• v.4 no.1
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• pp.34-38
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• 1998

Infantile hypertrophic pyloric stenosis(IHPS) is common in full-term babies, and relatively rare in prematures. The diagnosis of IHPS in premature infants may be obscured because of the lack of classic symptoms and signs and the absence of the standard criteria for ultrasonic diagnosis. The purpose of this study is to discover the clinical differences between premature and full-term infants with pyloric stenosis, and determine the appropriate diagnostic methods for early diagnosis in premature infants. The clinical records of 52 IHPS patients who had been operated upon from October, 1994 to April, 1997 were reviewed. The incidence of IHPS in premature infants was 25 %. The onset of symptom was 4.7 weeks of age in premature, and 2.9 weeks in full-term babies. Diagnosis was established by typical symptoms. signs. and diagnostic imaging studies. In two premature infants, diagnosis was confirmed by upper gastrointestinal(GI) series, because ultrasonography did not meet the diagnostic criteria. Two premature infants initially diagnosed as gastroesophageal reflux by esophagography. were found to have IHPS by upper GI series. For the diagnosis of IHPS, a new set of criteria for premature babies has to be developed.

• Journal of Nutrition and Health
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• v.23 no.2
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• pp.124-134
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• 1990

To investigate nutritional and growth status of premature infants, survey was conducted against 19 premature infants admitted to Nursery of Pediatrics, Young nam University Hospital from Jan. 1984 to July 1988. Variations in feeding patterns as analyzed through the five feeding phases of dextrose, dextrose/hyperal, dextrose/formula, dextrose/hyperal/formula and formula. During 30days from birth, dietary intake, feeding phase, selective anthropometric measurements, biochemical parameters and demograpic information of premature infants were as follows: Distributions of birth weight by gestational age and apgar score showed preamture infants below 1499g were 31 weeks, 4/7(1min/5min) and premature infants from 1500g to 1999g were 33 weeks, 8/9(1min/5min) and premature infants from 2000g to 2500g were 33 weeks, 8/9(1min/5min). Average calorie intakes of premature infants below 1499g, premature infants from 1500g to 1999g and premature infants from 2000g to 2500g were 102.0㎉/kg/day, 119.3㎉/kg/day and 101.7㎉/kg/day. The mean values Na, K, Ca, P for all premature infants remained within the normal level for full term infants throughtout the 25days of this study period. Percentages of inital weight loss showned premature infants below 1499g were 5.4%, premature infants from 1500g to 1999g were 6.4%, premature infants from 2000g to 2500g were 11.4%. Percentages of inital weight loss of the amino acid injection group and the amino acid control group were 9.4% and 9.0%.

• Journal of Institute of Control, Robotics and Systems
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• v.17 no.12
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• pp.1210-1218
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• 2011

GA (Genetic Algorithms) are efficient for searching for global optima but may have some problems such as premature convergence, convergence to local extremum and divergence. These phenomena are related to the evolutionary operators. As population diversity converges to low value, the search ability of a GA decreases and premature convergence or converging to local extremum may occur but population diversity converges to high value, then genetic algorithm may diverge. To guarantee that genetic algorithms converge to the global optima, the genetic operators should be chosen properly. In this paper, we analyze the effects of the selection operator, crossover operator, and mutation operator on convergence properties, and propose the sweeping method of mutation probability and elitist propagation rate to maintain the diversity of the GA's population for getting out of the premature convergence. Results of simulation studies verify the feasibility of using these sweeping operators to avoid premature convergence and convergence to local extrema.

• Journal of Veterinary Clinics
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• v.20 no.3
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• pp.403-405
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• 2003

A 11 month-old Shihtzu was referred to the Veterinary Medical Teaching Hospital, Seoul National University. Clinical signs of this patient were lameness, shortening limb, angular deformity, rotation of foot, subluxaion of elbow joint and restricted range of movement of left forelimb. For the evaluation of the abnormalities of left forelimb, radiographic examination was carried out. Radiographic findings were characteristics of premature closure of distal ulna such as closure of distal ulna growth plate and cranial bowing of radius. With radiographic signs and physical examination, it was diagnosed as premature closure of growth plate of the left forelimb. After osteotomy of the radius and ostectomy of the ulna, radiographic evaluation of limb about angulation of elbow joint was performed every 2-3 weeks for 3 months. In case of premature closure of distal growth plate of ulna, radiography was very useful for diagnositic method of premature closure of distal ulna and monitoring of healing process.