• 생명과학회지
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• 제20권6호
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• pp.948-954
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• 2010

운동은 신경의 생성, 적응, 보호 기능을 통해 뇌 기능 및 생성에 긍정적인 영향을 미치며, 유산소운동은 뇌신경 성장인자(GH, IGF-1, estrogen, serotonin)를 변화시키는 것으로 보고되었다. 본 연구는 여자 아동의 뇌기능 발달 및 뇌세포 생성 유도인자의 유산소운동 효과를 알아보고자 유산소운동 프로그램에 따른 뇌신경 성장인자(GH, IGF-1, estrogen, serotonin)의 변화를 분석하여 다음과 같은 결론을 얻었다. 반복측정 분산분석에 의해 운동군과 대조군의 평균을 비교한 결과 유산소운동은 집단간 유의한 차이를 보이며 체중, BMI, 체지방량, 체지방률을 감소 시켰으며, 제지방률을 증가시켰다. 또한 뇌신경 성장인자인 serotonin을 감소시켰으며, GH와 IGF-1을 증가시켰다. 본 연구결과 유산소운동 프로그램이 아동의 체중, BMI, 체지방, 체지방률 감소와 제지방률 증가에 효과적이다. 또한 serotonin이 운동 후 감소된 결과를 볼 때 유산소운동 프로그램이 아동의 중추피로 감소에 효과적이며, GH, IGF-1의 운동 후 증가된 결과를 볼 때 유산소운동이 아동의 뇌기능 발달 및 뇌세포 생성 유도에 긍정적인 프로그램임을 알 수 있다.

• 한국결정성장학회지
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• 제19권3호
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• pp.116-124
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• 2009

Our computational studies for the physical vapor transport crystal growth of $Hg_2Cl_2-Cl_2$ system evidence suggests that the PVT growth process exhibits the diffusion-dominated behaviors for aspect ratios more than and equal to 10, which would provide purely diffusive transport conditions adequate to microgravity environments less than $10^{-3}g_0$. Also, the regimes of high temperature difference based on the fixed source temperature of $380^{\circ}C$, where ${\Delta}T$ is relatively large enough for the crystal growth of mercurous chloride, the transport rates do not keep increasing with ${\Delta}T$ but tend to some constant value of $2.12\;mole\;cm^{-2}s^{-1}$. For the aspect ratios of 5, 10, and 20, the transport rate is directly proportional to the total pressure of the system under consideration. For Ar = 5, the rate is increased by a factor of 2.3 with increasing the total pressure from 403 Torr to 935 Torr, i.e., by a factor of 2.3. For both Ar = 10 and 20, the rate is increased by a factor of 1.25 with increasing the total pressure from 403 Torr to 935 Torr.

• Journal of Microbiology and Biotechnology
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• 제4권1호
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• pp.36-40
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• 1994

A water sample was taken from a black smoker chimney of a deep-sea hydrothermal vent by using an unmanned submersible "Dolphin 3K". The temperature of the hydrothermal fluid from the black smoker was $276^{\circ}C$. After isolation by repeated serial dilutions, An extremely thermophilic bacterial strain was selected. The strain designated as DT1331, was an anaerobic, non-motile, coccoid shaped bacterium with about 0.5 to $1.0\;\mu\textrm{m}$ in diameter. The strain DT1331 could grow up to $93^{\circ}C$, but the optimum temperature of this strain was $80^{\circ}C$. The growth occurred in the pH range of 4.5 to 8.5 and the optimum pH was 6.0. The strain DT1331 required 1% to 5% NaCl for growth and cell lysis was observed below 1% NaCl concentration. The bacterium could grow on polypeptides such as tryptone, peptone, soytone and on proteins such as casein or gelatin. However, no growth was observed on single amino acids, sugar and organic acids. Hydrogen gas was detected slightly during growth. This bacterium obligately required elemental sulfur and hydrogen sulfide gas was produced during growth.

• 복식문화연구
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• 제13권2호
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• pp.255-268
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• 2005

The purpose of this study was to identify the physical characteristics of early adolescent girls by age. A total of 529 girls aged between 10 and 14 were measured and data were collected from 42 anthropometric and 41 photographic measurements per a person. SAS 8.1 was used in data analysis including means, standard deviations, t-test, Duncan test and frequency analysis. The results of this study are as follows. Most items related to height and length increased significantly at the age of $10\sim11$ and the growth slowed down at the age of $13\sim14$. As for items related to circumference, the growth rate was high at the age of $11\sim12$, and gradually slowed down afterward. Out of circumference items, hip circumference showed the highest growth rate. As for items related to thickness and width, thickness-related items grew quickly at the age of $10\sim12$, and among which bust thickness showed the highest growth rate. As for drop, the difference between hip circumference and waist circumference was most remarkable, but the difference between hip circumference and bust circumference was not large. The largest number of subjects had their menarche during the age of $11\sim12$ and, after menarche, their horizontal growth became active.

• 가정과삶의질연구
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• 제34권6호
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• pp.27-40
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• 2016

This study examined the mediating effects of irrational beliefs on the relationships of middle school students' autonomy of psychological growth environment and behavioral anger responses(impulsive reaction, verbal aggression, physical confrontation and indirect expression). A sample of 346 first and second year students of middle school participated in the autonomy of psychological growth environment scale, the irrational beliefs scale and behavioral anger responses scale. Pearson's correlation analysis and regression analysis were performed. The results showed that: ⑴ The relations among autonomy of psychological growth environment, irrational beliefs and behavioral anger responses were significant. The autonomy of psychological growth environment had negative correlations with irrational beliefs and behavioral anger responses. Irrational beliefs produced positive correlations with behavioral anger responses. There were positive correlations among the subtypes of behavioral anger responses. ⑵ There were mediating effects of irrational beliefs between autonomy of psychological growth environment and behavioral anger responses. The effects of autonomy of psychological growth environment on impulsive reaction, physical confrontation and indirect expression were fully mediated by irrational beliefs. However, the effect of autonomy of psychological growth environment on verbal aggression was partially mediated by irrational beliefs. This study demonstrated that irrational beliefs mediate the relationship between autonomy of psychological growth environment and behavioral anger responses.

• 한국자기학회지
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• 제25권5호
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• pp.144-148
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• 2015

스피넬 결정구조를 지니는 $CoMn_2O_4$ 박막을 증착하였으며 이들 박막의 물리적 특성을 후열처리 이전과 이후로 비교 조사하였다. 증착온도인 $720^{\circ}C$보다 낮은 $700^{\circ}C$에서의 후열처리 과정 이후, 열처리 이전의 불분명했던 tetragonal 결정구조가 분명하여졌으며 이는 곧 표면상태의 변화로도 관측되었다. 자성특성의 경우 약 100 K에서 다결정 형태의 벌크에서는 측정할 수 없었던 상전이가 관측되었다. 상전이온도 이상의 온도에서는 전형적인 강자성 특성을 보이는 반면 상전이온도 이하에서는 페리자성 특성을 보였다. 특히 열처리 이후에는 페리자성 특성은 매우 뚜렷하여졌다. 이와 같은 결과는 후열처리과정이 $CoMn_2O_4$ 박막의 물리적 특성을 결정짓는데 필수적임을 의미한다.

• 보건교육건강증진학회지
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• 제24권5호
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• pp.69-85
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• 2007

연구목적: 본 연구는 1999년과 2005년의 다른 코호트에 있는 아동과 청소년 집단의 신체발육 특징을 비교분석함으로써 한국 아동과 청소년 신체발육의 단기적 시대변화를 파악하고자 하였다. 연구방법: 1999년 서울시 고등학교에 재학한 16세 남학생 231명, 여학생 346명과 2005년 서울시 고등학교에 재학한 16세 남학생 171명과 여학생 400명을 대상으로 이들의 건강검사 기록을 통해 종단적 신체발육자료를 수집하여 비교분석하였다. 연구결과: 주요 연구결과는 다음과 같다. 첫째, 남학생과 여학생 6세에서 16세까지의 모든 학생들의 2005년도 신장, 체중, 좌고, 흉위가 1999년에 비하여 더 컸다. 따라서 비교적 짧은 기간 동안에도 발육과정에 긍정적인 변화가 있음을 알 수 있었다. 둘째, 체중의 발육속도는 peak age이전이나 이후 모두 2005년이 컸으나, 신장은 peak age 이후에만 유의하게 컸다. 셋째, 2005년의 남학생들은 1999년에 비하여 신장은 평균 0.28년, 체중은 1.02년, 좌고는 0.39년, 흉위는 0.93년 앞서 있는 것으로 나타났다. 여학생의 경우, 신장은 0.81년, 체중은 0.76, 좌고는 0.32, 흉위는 0.57년 2005년이 앞서있었다. 즉, 2005년의 남학생들은 1999년에 비해 0.28-1.02년, 여학생들은 0.32-0.81년 발육이 앞서 있었다. 넷째, peak velocity에서만 남학생, 여학생 모두 유의한 시대적 변화가 있었고, peak age에서는 시대적 변화가 발견되지 않았다. 다섯째, BMI, 체중, 좌고, 흉위관련 지표에서 시대적 변화가 발견되었다. 특히 남학생의 경우는 체중, BMI, 흉위 관련지표에서, 여학생은 체중, 좌고에서 2005년과 1999년 간 유의한 차이가 발견되었다.

• 보건교육건강증진학회지
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• 제9권1호
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• pp.88-102
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• 1992

The exact estimation of physical growth by Obesity level has important meaning to the health care and evaluation on adolescent girls. So this study tried to clear the relationship between weight and body fat by using data for the height, weight of 124 elementary school children and high school student in Seoul. Then this study tried to show the physical growth pattern and various characteristics by Obesity level by using longitudinal for the height, weight of 1113 high school students in Seoul, and it also tried to show what influencing factors on the physical growth of this aged population. The result could be summarized as follows. 1. The relationship between weight and body fat(%) has 0.81475(r) at age 9 and 0.69361(r) at age 18. Also the relationship between weight and lean body muscle(LBM %) has -0.81470(r) at age 9 and -0.64729(r) at age 18. 2. The weakness, normal and obesity groups were classified by Obesity level. In case of weakness group showed the very low Obesity level at age 8 to 11, in case of obesity group showed the high Obesity level at age 15 to 18. Also Rohrer index was decreasing tendency up to age 12 in weakness group and increasing tendency over age 14 in obesity group. 3. When the height and weight growth pattern was compared, height growth was superior to weight growth at age 9 to 14.5 in normal group. But weight growth was inferior to height growth at age 9 to 14.5 in normal group. In obesity group, weight growth was superior to height growth at age 7 to 18. On the other hand the height growth of weakness group was superior to the normal group and the obesity group except age 11 to 12. 4. On height velocity curve by PHV age obesity group showed the most growth amount per year(9.00Cm/yr), and the next is normal group(8.77Cm/yr), weakness group(8.70Cm/yr). Then the difference between PHV age and PWV age was within 1 year in these three groups. 5. In these three groups, height velocity curve by menarcheal age showed the PHV before 2~3 years of menarcheal age. And weight velocity curve by menarcheal age showed the remarkable PWV before 1 year of menarcheal age.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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• pp.336-337
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• 2006

During sintering of cemented carbides abnormal grain growth is often observed but cannot be understood from the classical LSW-theory. A model based on 2-D nucleation of new crystalline layers and a grain-size distribution function is formulated and the equations are solved numerically. Experimental studies and computer simulations show that the initial grain size distribution has a strong effect on the grain growth behavior. For example, a fine-grained powder can grow past a coarser powder.

• ALGAE
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• 제22권2호
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• pp.107-116
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• 2007

Annual growth segments of Ascophyllum nodosum (L.) Le Jolis (Fucales, Fucaceae) are denoted by air bladders that form each spring. By examining annual growth segments, it may be possible to infer information about the physical conditions during the growth period; however, it is uncertain whether the annual segments will expand in size after the initial growth. We examined A. nodosum segments from three populations in Nova Scotia, and statistically evaluated whether the annual growth (length, mass, and maximum diameter) of segments was independent of the age of the frond, whether the segments increased in size after the initial growth, and whether the segment lengths were correlated with mean water temperatures and mean air temperatures when the segments were formed. We found that the growth in length of A. nodosum is dependent on the age of the frond, but frond age explained less than 12 % of the overall variation in length. However, the mass and maximum diameter of segments were independent of the age of the frond. Differences occurred between the lengths of segments formed in different years, but there was no significant correlation with regional mean water or air temperatures. This study indicates that the length of A. nodosum segments may be an indicator of the annual physical characteristics of a site, but future studies are needed to identify which factors have the strongest influence on growth patterns.