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도서지역 청소년층의 체용적에 관한 연구 : 제주도 초 중 고교생을 중심으로
홍성무 한국보건통계학회 1982 한국보건정보통계학회지 Vol.7 No.1
A study on 2,692 primary, middle and high school students (1328 boys and 1344 girls) in rural areas of jeijuu Island was conducted from May 1 to May 30 in 1979 for assessing their physical growth and development in terms of physical indices, and the correlation between body weight and volume is obtained. Following are the results. A. Physical Growth and Development. Rapid growth of physical growth in terms of body height and weight has been observed among 15 year-old boys and girls. Growth in terms of physical growth and development turned out to be slower among students of higher ages, irrespective of male or female. The maximum annual growth rates were as follows; Body height; 7.73cm during the age 13-14 for boys. r.59cm during the age 12-13 for girls. Body weight; 5.02kg during the age 14-15 for boys. 4.83kg during the age 12-13 for girls. This indicates that girls enter a rapidly growing stage one year earlier than boys of the body height. ON the average girls were found to enter a rapidly growing stage two year earlier than the boys. The greatest individual differences in growth and development were observed during 10-14 years of age. The standards of growth of rescent Korean students show much improved than that of 1967. B. Relative Body Weight. The smallest values of relative body weight was obtained with both boys and girls aged 10 which was found to be increasing rather slowly there after with advancing ages. The crossing point of boys and girls appeared at age 10.5 at which girls surpassed boys and at 14.5 boys su passed girls. The maximum annual growth rates of relative body weight were 3.22 from 13 to 14 years of age in boys and 2.33 from 13 to 14 years of age in girls. C. Body Surface Area and Volume. The mean value of the surface area and body volume was calculated by indirect method from body height and body weight. Rapid growth of surface area was shown in both sex during the period from 10 to 16 years of age. The crossing point of boys and girls appeared at age 10.5 at which girls surpassed appeared at age 10.5 at which girls surpassed boys and at 14.5 boys surpassed girls. The maximum annual growth rates of boy surface area were 0.1407m^2 from 13 to 14 years of age in boys and 0.1021m^2 from 12 to 13 years of age in girls. This indicates that girls enter a rapidly growing stage one year earlier than boys of the suface area. Rapid growth of the body volume was shown in both sex during the period 10-16 years of age. The crossing point of boys and girls appeared at age 10.5 at which girls surpassed boys and at 14.5, boys surpassed girls. The maximum annual growth rates of body volume were 6.48ℓ from 13 to 14 years of age in boys and 4.65ℓ from 12 to 13 in girls. D. Correlation between Relative Body Weight and Body Volume by Age. The correlation coefficient and equation between body weight or relative body weight and body volume by age are as shown in Table 7 and 8.
A Study on Micro/Nano Pattern Replication Using a Hydroxyethyl Cellulose Polymer
홍성무,Bosik Kang,안석영,Myung Jae Lee,이상준,마용원,박찬,강문석,신보성 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.67 No.12
A micro/nano pattern was simply fabricated on the surface of a hydroxyethyl cellulose (HEC) thin film and its properties were investigated. HEC is easily dissolved in water and has excellent properties such as viscosity, transparency and stability. In this study, HEC was prepared by chemical processing with water-insoluble cellulose and water-soluble ether and was then cast as a flexible film. With the use of a micro patterned metal mold, the pattern was simply replicated on the solid-state HEC film. Micro/nano hybrid structured patterns consisting of micro-scale structures of about 10 μm and nano-scale fibrils of less than 10 nm were prepared, and the surface characteristics of the patterned HEC film were experimentally verified. Measurements showed that the micro/nano hybrid structure resulted in a higher water drop contact angle, but the contact angle decreased gradually with increasing wetting time.
STS316L 분말의 레이저 클래딩층 특성에 관한 연구
홍성무,오재용,김동섭,장승철,신보성,Hong, SungMoo,Oh, JaeYong,Kim, DongSeob,Chang, SeungCheol,Shin, BoSung 한국마이크로전자및패키징학회 2017 마이크로전자 및 패키징학회지 Vol.24 No.3
Laser cladding is a technique for forming beads by melt-sintering with a laser while directly feeding metal powder onto the base material through nozzles. This technique, which is applied in laser surface treatment technology, is useful for repairing broken or worn parts by allowing selective formation of the surface layer of the base metal material. In this paper, laser cladding process was performed on STS316L powder using high power continuous wave laser with IR wavelength and the cladding characteristics according to process conditions were experimentally analyzed.
홍성무,Poornima D. E. Weerasinghe-Mudiyanselage,강소희,문창종,신태균 한국통합생물학회 2023 Animal cells and systems Vol.27 No.1
Visual impairment is occasionally observed in multiple sclerosis (MS) and its animal model,experimental autoimmune encephalomyelitis (EAE). Although uveitis and optic neuritis havebeen reported in MS and EAE, the precise mechanisms underlying the pathogenesis of thesevisual impairments remain poorly understood. This study aims to identify differentiallyexpressed genes (DEGs) in the retinas of mice with EAE to identify genes that may beimplicated in EAE-induced visual impairment. Fourteen adult mice were injected with myelinoligodendrocyte glycoprotein35–55 to induce the EAE model. Transcriptomes of retinas with EAEwere analyzed by RNA-sequencing. Gene expression analysis revealed 347 DEGs in the retinas ofmice with EAE: 345 were upregulated, and 2 were downregulated (adjusted p-value < 0.05 andabsolute log2 fold change > 1). Gene ontology (GO) analysis showed that the upregulated genesin the retinas of mice with EAE were primarily related to immune responses, responses toexternal biotic stimuli, defense responses, and leukocyte-mediated immunity in the GObiological process. The expression of six upregulated hub genes (c1qb, ctss, itgam, itgb2, syk,and tyrobp) from the STRING analysis and the two significantly downregulated DEGs (hapln1and ndst4) were validated by reverse transcription-quantitative polymerase chain reaction. Inaddition, gene set enrichment analysis showed that the negatively enriched gene sets in EAEaffectedretinas were associated with the neuronal system and phototransduction cascade. Thisstudy provides novel molecular evidence for visual impairments in EAE and indicates directionsfor further research to elucidate the mechanisms of these visual impairments in MS.