• 한국결정성장학회지
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• 제20권3호
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• pp.125-132
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• 2010

For typical governing dimensionless parameters of Ar = 5, Pr = 1.16, Le = 0.14, Pe = 3.57, Cv = 1.02, $Gr_s=2.65{\times}10^6$, the effects of thermo physical properties such as a molecular weight, a binary diffusivity coefficient, a partial pressure of component B on solutally buoyancy-driven convection (solutal Grashof number $Gr_s=2.65{\times}10^6$) are theoretically investigated for further understanding and insight into an essence of solutal convection occurring in the vapor phase during the physical vapor transport of a $Hg_2Cl_2-N_2$ system. The solutally buoyancy-driven convection is significantly affected by any significant disparity in the molecular weight of the crystal components and the impurity gas of nitrogen. The solutal convection in a vertical orientation is found to be more suppressed than a tenth reduction of gravitational accelerations in a horizontal orientation. For crystal growth parameters under consideration, the greater uniformity in the growth rate is obtained for either solutal convection mode in a vertical orientation or thermal convection mode in horizontal geometry. The growth rate is also found to be first order exponentially decayed for $10{\leq}P_B{\leq}200$ Torr.

• Journal of applied mathematics & informatics
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• 제17권1_2_3호
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• pp.747-757
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• 2005

A physical variable is customarily thought of as a function. Another way of describing a physical variable is to specify it as a functional, whose special type is called a distribution. It turns out that the distribution concept provide a better mechanism for analyzing certain physical phenomena than does the function concept. By using wavelets with high regularity we give a resolution of functions with slow growth.

• 한국결정성장학회지
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• 제29권3호
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• pp.140-142
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• 2019

자외선 LED용 기판소재로 응용가능한 AlN(질화알루미늄) 단결정을 물리기상이동법(Physical Vapor Transport Method)으로 성장하기 위해 성장 거동을 조사하였다. 다결정의 종자결정을 사용하였으며, 직경은 3인치급이었고, 120시간 동안 성장공정을 수행하여 길이 약 4 mm의 다결정상을 얻었다. 본 연구에서는 성장 조건과 대형의 도가니를 사용하였을 경우의 성장 거동에 대하여 고찰하여 보고자 하였다.

• The Korean Journal of Physiology
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• 제4권1호
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• pp.29-46
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• 1970

Measurement and analysis of the physical status (height, body weight, breast girth, sitting height. length of leg, length of thigh, thigh girth, crural length, length of arm, brachial length, antebrachial girth and skinfold thickness), physical types and the growth were made to the 360 Korean middle and high school boys aged between 12 and 17 years in Taegu City. The physical status was evaluated and expressed as dispersion and the Physical type as percentage of each status to height, and the growth was analysed by the growth formula. The results are as follows; 1) The increase of the volumes of Physical status was slowest between 12 and 13 years and fastest between 13 and 14 years in general. 2) The increase of the volumes of thigh girth and antebrachial girth showed a linear pattern until 16 years. 3) The coefficient of variation was largest in skinfold thickness $(16.3{\sim}28.4%)$ followed by body weight $(10.0{\sim}14.3%)$, antebrachial girth $(4.8{\sim}19.60%)$ and length of thigh$(6.3{\sim}13.6%)$. The coefficients of variation in all the other status were similar $(4{\sim}7%)$. 4)The physical indices of body weight, breast girth, sitting height, length of thigh, thigh girth, antebrachial girth and skinfold thickness increased as age increased while the others decreased except the brachial length, which showed no significant change. 5) Ratio of growth quantity was largest in body weight followed by skinfold thickness, and the others were all similar. 6) Growth rate and specific growth rate decreased in the all the status analysed as age increased except in the skinfold thickness in which an increase was noted. 7) Growth gradient was increased along the increase of age in breast girth, sitting height, crural length, brachial length and in skinfold thickness. However a decrease was observed in the other status except in the body weight which was decreased until 15 years of age and increased thereafter.

• Journal of Dairy Science and Biotechnology
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• 제28권1호
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• pp.9-16
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• 2010

Adolescents grow rapidly and have lots of schoolwork for entrance examination, so good nutrition is very important to them. However, adolescents tend to have a poor dietary behavior including frequent consumption of empty calorie foods and skipping breakfast. In particular, frequency of drinking milk has been low among Korean adolescents, thus their dietary calcium intakes has been low. Undesirable dietary behavior of adolescents is a risk factor for poor nutrition, obesity and chronic disease of them. Milk is a good source for calcium, high quality of protein, vitamin and bioactive compounds including anti-obesity component, thus it has been reported that milk helps improvement of dietary nutrient adequacy and physical growth, increment of bone mineral density, and prevention of obesity and chronic diseases. Therefore, milk consumption of adolescents should be encouraged in order to help their nutritional status, physical growth and health.

• Child Health Nursing Research
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• 제12권1호
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• pp.104-113
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• 2006

Purpose: This study was conducted to develop and evaluate the effectiveness of a prenatal parental role education program. Methods: The participants were healthy primiparous women and their healthy newborn babies. 57 mother-infant diads(27 in the intervention group, 30 in the control group). For the intervention group, an additional 4 prenatal parental role education programs and 2 postnatal telephone calls(1st & 3rd week after birth) were provided. Data were analyzed by frequency, chi-square test, t-test and repeated measures ANOVA using SPSS PC+ 10.0 program. Results: Significant differences were found in self-confidence in maternal role performance, mother-infant interaction and infant physical growth between the two groups. This result indicate that the intervention program was effective in improving self-confidence in maternal role performance, mother-infant interaction and in facilitating infant physical growth. Conclusions: The prenatal parental role education program developed by the author was a very effective program in promoting maternal self-confidence, mother-infant interaction, and fostering infant's physical growth at 4 weeks after infant's birth.

• The Korean Journal of Ecology
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• 제16권4호
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• pp.417-428
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• 1993

백목련의 가지 생장유형은 두 가지의 생장전략에 의해 이루어지는 것으로 보인가. 하나는 환경 극복 전략이고 다른 하나는 생명 유지 전략으로 구분할 수 있는데, 이러한 전략은 한 그루의 나무 안에서도 같이 일어나고 있었다. 가지의 생장율은 조도에 밀접한 관련이 있었고(P<0.001) 물리적인 접촉의 유무와도 상당히 관련(P<0.01)되어 있는 반면에 방위별로는 우의차가 없었다. 상대 조도 1%미만의 경우는 주변 가지들과 거의 물리적인 접촉으로 대부분 생장이 제한되어 있었고, 10% 초과의 경우는 접촉에 의해 생장 제한이 거의 일어나지 않았다. 가지간의 물리적인 접촉의 유무는 분지율에 영향을 미치고 있었으나(P<0.05), 분지율은 조도에 무관하고, 방위별로도 유의차가 없었다. 생장 초기에는 주가지에서 부가지로의 물질 분배비가 크게 나타났으나 나무가 자라면서 환겨의 제한을 받게 됨에 따라 분배비는 다양하고 때로는 아주 적은 값을 보이기도 하였다. 이러한 다양한 생장율, 즉 물질의분배비의 다양(0.16~0.98)은 생장과 더불어 빚어지는 제약을 극복하여 태양 에너지를 최대한 효율적으로 흡수하기 위한 가지의 배치로 해석되며, 주어진 환경하에서 백목련이 택하는 최적의 생장 전략인 것으로 생각되다.

• 보건교육건강증진학회지
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• 제23권5호
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• pp.13-27
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• 2006

This study was performed to formulate the most recent traits of physical growth of youth, and to identify the need of youth for health promotion planning in modern Korea. Study participants were 171 boys and 400 girls in two senior high schools in Seoul, Korea. Health records were collected from the individual students in May 2005. Longitudinal data on stature and body weight from 6 to 16 years old were analysed. Significance tests on some measures were performed by t-test and ANOVA. Major conclusions were as follows: 1. Girls were taller than boys during the specific time of adolescence. However, this phenomenon was not found in the growth process investigated by peak age and in over-all mean growth process of body weight. 2. Peak age came later in boys than in girls in both stature and body weight. This meant that boys matured later in stature and body weight than girls. However, boys were larger in peak velocity than girls. 3. Peak ages distributed more widely in girls than in boys both for stature and body weight. 4. Even in such short growth process from 6 through 16 years old, growth spurt tended to appear in several times. 5. Growth spurt tended to appear more often in boys than in girls.

• Journal of Preventive Medicine and Public Health
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• 제11권1호
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• pp.31-40
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• 1978

저자는 1970년부터 1975년까지 6 년갑에 걸쳐 부산지역 국민학교 학생들의 신체발육상태를 평가하고져 무작위로 추출한 부산시 모 국민학교 학생 656명(남 374, 여 282)을 대상으로 그들의 실제 신체체격 측정을 통하여 과거 6 년 동안의 신체발육상태를 조사 분석하여 다음의 결론을 얻었다. (1) 신장의 연간 최대성장연령은 남자$7{\sim}8$세 (5.9cm), 여자 $10{\sim}11$세 (6.5cm)이었고 남녀 신장발육곡선은 $10{\sim}11$세에서 서로 교차하였다. (2) 체중의 연간 최대성장연령은 남자 $9{\sim}10$세(3.1kg), 여자 $10{\sim}11$세 (3.9kg)이었고 남녀체중발육 곡선은 $10{\sim}11$세에서 서로 교차하였다. (3) 흉위의 연간 최대성장연령은 남자 $8{\sim}9$세(3.1cm), 여자 $9{\sim}10$세 (2.9cm)이었고 전자와는 달리 남녀 융위발육곡선은 서로 교차하지 않았다. 4. 좌고의 연간 최대성장연령은 남녀 모두 $6{\sim}7$세 (남 3.3cm, 여 3.4cm)이었고 남너 좌고발육곡선은 $8{\sim}9$세에서 서로 교차하였다. (5) 각 지역간의 비교에는 각각의 신체계측치를 체격종합치 (Physical Integrated Ualue)로서 서로 비교하는 것이 매우 간편하고 바람직 하였으며 한국소아 신체표준발육치에 대한 부산지역 국민학교 학동들의 체격종합치 (Physical Integrated Value)는 남여 각각 신장 +0.30, +0.29, 체중 +0.33, +0.35 흉위 +0.65, +0.57, 좌고 +0.10, +0.20으로 서울을 제외한 타지역 (대구, 대전, 농촌지역)에 비하여 비교적 우수하였다.

• 생명과학회지
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• 제22권3호
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• pp.380-386
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• 2012

본 연구는 비만유아 7명과 정상체중유아 7명을 대상으로 유아체육프로그램이 신체조성, 체력, 혈중지질 및 성장관련인자의 변화를 분석하기 위해 실시되었다. 본 연구에서 실시한 유아체육프로그램이 체지방량을 감량시키는데 효과적인 결과를 얻지 못하였지만 비만군과 정상체중군 모두 체력은 향상되는 것으로 나타났다. 그리고 정상체중유아들의 경우 HDL-C와 제지방량의 증가는 본 연구에서 실시한 유아체육프로그램이 성인기의 비만과 성인병 예방 측면에서 정상체중유아들에게 권장될 수 있는 것으로 사료된다. 또한 성장관련인자 IGF-I은 성장을 촉진하는 활성 물질로 성장호르몬 분비의 증가에 따라 IGF-I 농도 역시 상승한다. 본 연구에서도 정상체중군에서 긍정적인 효과가 나타나 유아체육프로그램이 성장기 유아의 성장호르몬의 분비를 활성화시키고 성장을 촉진시키며 신체발달을 증진시키는데 도움을 줄 수 있을 것으로 생각한다.