• 대한치주과학회:학술대회논문집
• /
• 2003.11a
• /
• pp.63-63
• /
• 2003

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2007.11a
• /
• pp.373.1-373.1
• /
• 2007

See Full Text

• Journal of the East Asian Society of Dietary Life
• /
• v.14 no.1
• /
• pp.27-33
• /
• 2004

The objectives of the present study were to measure the content of iron, copper and zinc in human milk and to estimate the intake of iron, copper and zinc of breast-fed infants during the early period of lactation. Twenty-five lactating women who delivered in a hospital in Seoul volunteered for the study. Milk samples were collected at day 2, 3, 4, 5, 6, 7, 15 and 30 postpartum. The contents of iron, copper and zinc were determined using the atomic absorption spectrophotometer after wet digestion. The intakes of iron, copper and zinc of infants were estimated by multiplization with the infant milk intake reported in our laboratory. The content of iron was 0.58 $\mu\textrm{g}$/g in colostrum, 0.48 $\mu\textrm{g}$/g in transitional milk and 0.39 $\mu\textrm{g}$/g in mature milk while the estimated iron intake of infants was 271, 255 and 259 $\mu\textrm{g}$/day, respectively. The content of copper in the milk was 0.45 $\mu\textrm{g}$/g in colostrum, 0.43 $\mu\textrm{g}$/g in transitional milk and 0.33 $\mu\textrm{g}$/g in mature milk while the estimated copper intake of infants was 210, 229 and 220 $\mu\textrm{g}$/day, respectively. The content of zinc in the milk was 5.24 $\mu\textrm{g}$/g in colostrum, 3.70 $\mu\textrm{g}$/g in transitional milk, 2.93 $\mu\textrm{g}$/g in mature milk while the estimated zinc intake of infants was 2452, 1968, and 1949 $\mu\textrm{g}$/day, respectively. These results suggest that copper and zinc intake of infants are met to RDA but iron is not.

• Journal of the Korean Geotechnical Society
• /
• v.31 no.9
• /
• pp.29-38
• /
• 2015

In this study, track dynamic interaction characteristics caused by the vehicle running through transitional section such as bridge abutments were studied using the finite element analysis program. The geometric condition of track was generated by trigonometric function and allowable maximum track irregularity is determined by KORAIL track maintenance criteria. The sub-infrastructure under rail fastener system was modelled by 3D solid elements. To reduce computational cost only half track line is numerically considered and the roller boundary condition was applied to each side of model. In this study, the vehicle-track dynamic interaction analysis was carried out for standard Korean transition section of concrete track and the dynamic behaviors were investigated. The dynamic characteristics considered are wheel load variation, vertical acceleration at body, and maximum Mises stress at each part of transitional section.

• Applied Microscopy
• /
• v.33 no.3
• /
• pp.195-204
• /
• 2003

The Experimental calibration method has been investigated to correct d-spacing estimation and to identify phases in the electron diffraction data acquired by imaging plates. When the diffraction data from the imaging plate was corrected by the d-spacing calibration method with the radial intensity distribution plotting in this experiment, The accuracy of d-spacing estimation was significantly increased in errors of about 0.5%. The experimental calibration equation followed up the first order exponential decay function was derived from the trace of d-spacing deviation between the measured and the calculated values. It was applied to the analysis of d-spacing and the phase identification of the transitional phases formed from [001] gibbsite specimen by electron beam irradiation effect. In this case more accurate phase identification and d-spacing evaluation is possible for the transitional phases whose diffraction patterns are complicatedly superimposed. It is concluded that ${\chi}$-alumina, ${\gamma}$-alumina and ${\sigma}$-alumina are clearly identified as the major transitional phases formed from gibbsite by electron beam irradiation for 120 min.

• The Journal of the Korea Contents Association
• /
• v.13 no.12
• /
• pp.276-290
• /
• 2013

PURPOSE: This study compared the elderly falls and the intrinsic fall risk factors according to gender. METHODS: This descriptive cross-sectional study was a secondary analysis of the data collected for medical checkups for the Transitional Periods of Life supported from the National Health Insurance. The subjects examined were 255,505 people aged 66 years in Korea between January and December, 2008. RESULTS: The elderly people aged 66 when in the transitional periods of life experienced 10.6% of their first falls. The first falls of women (12.4%) was greater than that of men (8.5%) in the elderly. The risk factors for falls included dysuria with an odds ratio of 6.2 to 6.6, depression with an odds ratio of 1.5 to 1.8, gait disturbance with an odds ratio of 1.3 to 1.5, and blindness with an odds ratio of 1.3 to 1.4 in both elderly women and men. CONCLUSIONS: Effective fall prevention should focus on dysuria because it is a more important predictor of falls, even though many intrinsic fall risk factors can affect falls in elderly people.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.17 no.7
• /
• pp.518-528
• /
• 2016

It seems like many songs have the tonality of one key in jazz standards, but there are many cases in which more than one new key could be formed, despite being a short moment. Moreover, some songs contain keys of temporary changes many times in the event that keys are changed transitionally with the sequencing of cords many times, which is called 'Transitional Modulation with Sequences. The proceeding II-V-I of the major and minor keys are used as the sequencing of cords, and the most popular type in this sequencing pattern is the downward modulation in whole-steps or half-steps. The downward modulation in the interval of whole-steps is a useful technique; for example, there should be three compositions in the adjacency circumstances when it is used twice. We could express effectively a phenomenon that feelings go up to the climax and rapidly fall down. The downward modulation in half-steps must be more dramatic because a higher comparative aspect is made between the adjacent two keys.

• The Journal of Korean Academy of Prosthodontics
• /
• v.44 no.6
• /
• pp.722-733
• /
• 2006

Statement of problem. The use of small diameter implants having less than 3 mm in diameter were restricted because of lack of bonding strength to bone. Purpose. The purpose of this study was to observe how much resorbable blast media pin implants increase the binding force to the bone compared to machined transitional pin implants by measuring removal torque, and whether they can be used as final implants for replacement of small diameter teeth. Material and method. Fifteen rabbits were used in this study. Two kinds of implants (resorbable blast media pin implants and machined transitional pin implants) were inserted in each tibia bicortically. After healing time of 2, 4 and 8 weeks, the removal torque values were recorded and the rabbits were sacrificed for histological analysis. Linear finite element method analyses were conducted to compare bicortical fixation with monocortical fixation. Result and conclusion. Within the limitation of this in vivo study, the following conclusions were drawn: 1) The removal torque value of RBM pin implants showed statistically significant increase compared to machined pin implants at 2, 4, and 8 weeks respectively (p<0.05). 2) The removal torque value of RBM pin implants at 2, 4, and 8 weeks was increased statistically significantly with time (p<0.05). 3) Bicortical fixation showed better stress distribution compared with monocortical fixation in a linear finite element method analysis. 4) RBM pin implants are not recommended as transitional implants because they showed a lot of bone fracture in histologic specimens.

• Transactions of the Korean Society of Mechanical Engineers B
• /
• v.25 no.6
• /
• pp.786-798
• /
• 2001

This paper describes the phenomena of wake-induced transition of the boundary layers on a NACA0012 airfoil using measured phase-averaged data. Especially, the phase-averaged wall shear stresses are reasonably evaluated using the principle of Computational Preston Tube Method. Due to the passing wake, the turbulent patch is generated in the laminar boundary layer on the airfoil and the boundary layer becomes temporarily transitional. The patches propagate downstream with less speed than free-stream velocity and merge with each other at further down stream station, and the boundary layer becomes more transitional. The generation of turbulent patch at the leading edge of the airfoil mainly depends on velocity defects and turbulent intensity profiles of passing wakes. However, the growth and merging of turbulent patches depend on local streamwise pressure gradients as well as characteristics of turbulent patches. In this transition process, the present experimental data show very similar features to the previous numerical and experimental studies. It is confirmed that the two phase-averaged mean velocity dips appear in the outer region of transitional boundary layer for each passing cycle. Relatively high values of the phase-averaged turbulent fluctuations in the outer region indicate the possibility that breakdown occurs in the outer layer not near the wall.

• Korean Journal of Childcare and Education
• /
• v.11 no.3
• /
• pp.85-102
• /
• 2015

The purpose of this study is to investigate the variables that affect the problem behavior of children and to examine the relationships between problem behavior of young children in relation to the child's characteristics(temperament and ego-resiliency), the mother's characteristics(parenting stress and personality characteristics), and the teacher's characteristics(teacher-child relationship and emotional expressiveness). The researcher surveyed 314 parents and 56 teachers of young children in the transitional period from 32 early childhood institutes in Daejeon. The summaries of the results of the study are as seen below. First, the child's gender and mother's education were statistically significant variables in explaining the variance in problem behavior of young children. More boys than girls showed more problem behaviors and children of mothers who graduated university showed less problem behavior. Second, teacher-child relationship was the most predictive variable in problem behavior of young children. Children who had good relationships with their teachers showed less problem behavior and children who had poor relationships with their teachers showed more problem behavior. The results of this study can provide basic data for consulting and developing program to prevent and treat the problem behavior of young children to consider the development of children.